JPH0411090A - Method for making off-set printing paper - Google Patents

Abstract

PURPOSE:To provide off-set printing paper whose front and back surfaces can be printed with different inks, by preparing the paper so that the front surface is suitable for heat set off type inks and the back surface is suitable for cold set off type inks. CONSTITUTION:(B) A clear sizing agent comprising a natural adhesive or synthetic resin adhesive or a pigment sizing agent containing the adhesive agent as a main component and a pigment for coated paper in an amount of <=50% is coated on the surfaces A and B of (B) raw paper containing mechanical pulp and a filler in an amount of 3-20wt.% based on the absolutely dry weight of the raw paper in amounts of 0.1-2g/m<2> and <=0.6g/m<2>, respectively, followed by subjecting both the surfaces to matting treatments to provide the objective paper having the A surface suitable for heat set off print and the B surface suitable for print using penetration dry type inks.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はオフセット用印刷用紙の製造方法に関し、特に
オフセット輪転機で印刷する際に片面がヒートセットオ
フ型インキの使用による印刷に適し、反対面はコールド
セットオフ型インキの使用による印刷に適する如く表面
と裏面で異なる種類のインキが使用できる又は異なる印
刷方式での印刷が可能であるオフセット用印刷用紙の製
造方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for producing offset printing paper, and in particular, when printing on an offset rotary press, one side is suitable for printing using heat set-off type ink, and the other side is suitable for printing using heat set-off type ink. The present invention relates to a method for producing offset printing paper, which can be printed with different types of ink on the front and back sides, or can be printed with different printing methods, so as to be suitable for printing using cold set-off type inks.

〔従来の技術〕[Conventional technology]

近年、印刷仕上げ及び鮮明度に優れた印刷用紙の需要の
伸びは著しく、且用途も多方面に拡大している。特にカ
ラー化、ビジュアル化の傾向が強く、この傾向は大量の
部数を発行する新聞折り込み広告にも及んでおり、これ
らを印刷する輪転機の稼働率も上昇してきている。一般
に、これら印刷用紙の多色印刷は鮮明性が要求されるた
め酸化重合型のインキを用い、アフタードライヤーを装
備したヒートセット型輪転機を使用するが、稼働率の上
昇に伴いこのような輪転機を備えた印刷所が随時に利用
できない状況となって来ている。又、一方では、片面の
み高級な多色刷り印刷とし、反対面は一般の単色印刷物
で良いというニーズがある。In recent years, the demand for printing paper with excellent print finish and sharpness has increased significantly, and its uses have also expanded in a wide variety of fields. There is a particularly strong trend toward colorization and visualization, and this trend extends to newspaper insert advertisements that are printed in large numbers, and the operating rate of the rotary presses used to print them is also increasing. Generally, multicolor printing on these printing papers requires sharpness, so oxidative polymerization type ink is used, and a heat-set type rotary press equipped with an afterdryer is used, but as operating rates increase, such rotary presses Printing shops equipped with turning points are becoming increasingly unavailable. On the other hand, there is a need for high-quality multicolor printing on one side, and general monochrome printing on the other side.

多色印刷面は酸化重合型のインキを使用し、アフタード
ライヤーを装備したヒートセット型輪転機で印刷するこ
とにより良い印刷品質が得られる。しかし、反対面は要
求される印刷品質から或いは設備上の関係から浸透乾燥
型インキを使用することが一般的である。特に、新聞印
刷設備でこの印刷を行う場合は多色面よりも先に単色印
刷を行い、乾燥装置を通らずに多色印刷を実施すること
となるので、反対面のインキは乾燥が十分でない為イン
キのセットが不十分の状態となる。従って、印刷物は製
本又は折り込み及び輸送過程においてユーザーの手に渡
るまでの間に印刷面がこすられ、印刷物が損なわれる。Multicolor printing uses oxidative polymerization type ink and prints on a heat-set rotary press equipped with an afterdryer to achieve good print quality. However, for the opposite side, it is common to use penetrating ink due to the required printing quality or equipment considerations. In particular, when this printing is performed using newspaper printing equipment, single-color printing is performed before the multi-color side, and multi-color printing is performed without passing through the drying device, so the ink on the opposite side is not sufficiently dried. Therefore, the ink setting becomes insufficient. Therefore, during the binding or folding and transportation process, the printed surface of the printed material is rubbed and damaged before it reaches the user.

又、剥ぎ取られたインキが印刷面と重なり合った反対面
を汚すという重大な問題も発生する。In addition, a serious problem arises in that the stripped ink stains the opposite surface that overlaps the printed surface.

更に、印刷過程においても、通常のオフセット用印刷用
紙ではインキ乾燥性が両面とも同じである為アフタード
ライヤーを使用しない面の印刷に浸透乾燥型インキを使
用した場合、印刷面のインキが印刷機の圧胴に「裏移り
」　（セットオフ）し、印刷面が少しずつずれてしまう
「ダブリ」というトラブルを発生する。Furthermore, during the printing process, with normal offset printing paper, the ink drying properties are the same on both sides, so if penetrating drying ink is used to print on the side that does not use an afterdryer, the ink on the printing side will dry faster than the printing machine. ``Set-off'' occurs on the impression cylinder, causing a problem called ``doubling'' where the printed surface is slightly shifted.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

片面のみを高級な多色カラー印刷することは従来から実
施されており、又表裏差のある用紙も従来から多くの種
類が市販されている。それ等には感熱、感圧、ノンイン
パクトプリンター用のいわゆる情報記録紙関連に属する
もの、写真印画紙、磁気記録紙、感光原紙、複写用紙等
のいわゆる雑種紙、特殊用紙に属するもの及び片つやク
ラフト、カード、板紙、段ボール等の包装用紙を挙げる
ことができる。High-quality multicolor printing on only one side has been practiced for some time, and many types of paper with different front and back sides have been commercially available. These include information recording papers for heat-sensitive, pressure-sensitive, and non-impact printers, miscellaneous papers such as photographic paper, magnetic recording paper, photosensitive base paper, copying paper, special papers, and glossy paper. Wrapping papers such as kraft, card, paperboard, cardboard, etc. may be mentioned.

しかしながら、これらは両面印刷を目的とし積極的に表
裏差を大きくした用紙ではない。美麗な印刷物を得る目
的の為には塗布組成物を塗布・乾燥後にスーパーキャレ
ンダー等のっや掛け装置で処理した印刷用紙が適してお
り、印刷方式としては酸化重合型インキの如く比較的硬
い（粘性の高い）インキで印刷し、アフタードライヤー
で強制乾燥することが一般的に行われている。However, these are not sheets of paper that actively increase the difference between the front and back sides for the purpose of double-sided printing. In order to obtain beautiful printed matter, printing paper that has been coated with a coating composition, dried, and then treated with a rolling device such as a super calender is suitable. It is common practice to print with (highly viscous) ink and force dry it with an afterdryer.

つや掛けした印刷用紙は紙面が緻密となり平滑性が高い
のでインキの付着が均一となり易く、又紙面の緻密さに
よってインキの紙中への沈みが少ないことからより鮮明
な印刷物を得るのに効果的であると考えられる。インキ
としては粘性が高いものの方が多くのインキを紙に転移
することができより重厚な印刷物を得ることができる。Glossy printing paper has a dense paper surface and high smoothness, which makes it easier for ink to adhere evenly, and the dense paper surface prevents ink from sinking into the paper, making it effective for obtaining clearer printed matter. It is thought that. The more viscous the ink, the more ink can be transferred to the paper, making it possible to obtain thicker printed matter.

しかしながら、つや掛けした印刷用紙は前記の如く強制
乾燥装置を使用すれば美麗な多色印刷を得るのに適する
が、印刷直後から強制乾燥装置を通過するまでの間はイ
ンキの乾燥が殆ど皆無であり、その中間の過程に別の印
刷工程、紙の移送設備等が存在する場合にはそれらの部
品にインキが付着して最終的に印刷面並びに印刷機その
ものを汚してしまうトラブルを発生する。However, although glossy printing paper is suitable for producing beautiful multicolor prints if a forced dryer is used as described above, the ink hardly dries from the time it is printed until it passes through the forced dryer. However, if there are other printing processes, paper transport equipment, etc. in the intermediate process, ink will adhere to those parts and eventually stain the printing surface and the printing machine itself.

又、強制乾燥の前工程でこのような汚れトラブルを防止
する為には紙のインキ吸収速さ及び吸収力を大きくし、
さらにインキの種類を浸透乾燥型とする方式がある。In addition, in order to prevent such staining problems in the process before forced drying, increase the ink absorption speed and absorption power of the paper,
Furthermore, there is a method in which the type of ink is a penetrating drying type.

浸透乾燥型インキを使用する印刷方式のう方凸版印刷と
オフセット印刷のどちらの場合もインキの吸収速さ及び
吸収力を大きくしてよほど乾燥を速くしなければ印刷時
のダブリ、印刷物のセットオフ、印刷面同士又は紙と手
のこすれによるインキ落ち（ラブオフ）という重大なト
ラブルを引き起こすこととなる。In both letterpress printing and offset printing, which are printing methods that use penetrating drying inks, unless the ink absorption speed and absorption capacity are increased to make the drying process much faster, there will be double printing and print set-off. This can cause serious problems such as ink falling off (rub-off) due to the rubbing of printed surfaces against each other or between the paper and the hand.

一方、多色印刷を行なう面の印刷品質を向上させる為に
塗布組成物を塗布する場合は通常反対面もほぼ同量に塗
布組成物を塗布し、さらにキャレンダー掛け又はスーパ
ーキャレンダー掛け処理をして紙面に平滑性及び光沢を
付与せしめるのが一般的であるが、その際反対面も同じ
ように平滑性及び光沢が出てしまい、結果的にインキは
浸透乾燥し難くなっているのが常である。On the other hand, when applying a coating composition to improve the print quality on the side that will be printed in multiple colors, the coating composition is usually applied in approximately the same amount to the opposite side, and then calendering or supercalendering treatment is applied. Generally, the paper surface is made to have smoothness and gloss, but in this case, the opposite side also becomes smooth and glossy, and as a result, it becomes difficult for the ink to penetrate and dry. Always.

以上のような理由から、既存の技術及びそれらの組み合
あせでは片面が従来のコート紙及び微塗工紙並のオフセ
ット印刷適性を有し、反対面は浸透乾燥型インキでの印
刷適性を有するという満足な紙はなく、このような新製
品が強く要望されていた。For the reasons mentioned above, with existing technologies and their combinations, one side has the suitability for offset printing on par with conventional coated paper and lightly coated paper, and the other side has suitability for printing with penetrating drying inks. There was no paper that was satisfactory, and there was a strong demand for a new product like this.

そこで、本発明は片面が酸化重合型インキを用いてヒー
トセット型印刷機により美麗な多色カラー印刷効果を発
現せしめ、反対面は浸透乾燥型インキを用いてコールド
セット型印刷機により単色印刷を行う表裏同時印刷が可
能な印刷用紙及びその製造方法を提供することを目的と
する。Therefore, in the present invention, one side uses oxidative polymerization type ink to produce a beautiful multicolor printing effect using a heat set type printing machine, and the other side uses penetrating drying type ink to perform monochrome printing using a cold set type printing machine. An object of the present invention is to provide a printing paper capable of simultaneous printing on both sides and a method for manufacturing the same.

〔課題を解決する為の手段〕[Means to solve problems]

本発明は機械パルプを含み、且つ填料を原紙の絶乾重量
当たり３〜２０重量％含む原紙に天然接着剤、合成樹脂
系接着剤の一種類又はそれ以上からなるクリヤーサイズ
液又は前記接着剤を主成分として塗布紙用顔料を５０％
以下含むピグメントサイズ液を原紙のＡ面には０．１ｇ
／ｍ２以上２ｇ／（ｌＩ２以下、Ｂ面には０．６ｇ／ｍ
２以下塗布し、Ａ面をＪＩＳ−Ｐ８１４２で測定した光
沢度が１８％以上とし且つＢ面をＲＩ印刷機で新聞オフ
輪墨インキ（ＴＶ＝３〜４相当）の浸透乾燥型オフセッ
トインキを用い、印刷濃度がコーサー濃度計で１．０±
０．１になるように印刷して１分後、この印刷面に白色
度８２±１．５％、光沢度６２±８％の市販Ａ、コート
紙を重ねてニップ幅１０ｍｆｆ１の圧力で圧着した時の
市販Ａ２コート紙へのインキの転写をコーサー濃度計で
測定した値（セットオフ値）が０．２８以下となる如く
つや掛け処理を行って、Ａ面にはヒートセットオフ印刷
に適する性質を持たしめ、Ｂ面には浸透乾燥型インキ使
用による印刷に適する性質を持たしめたことを特徴とす
るオフセット用印刷用紙の製造方法である。The present invention provides a base paper containing mechanical pulp and a filler of 3 to 20% by weight based on the absolute dry weight of the base paper, and a clear size liquid comprising one or more of natural adhesives and synthetic resin adhesives, or the above-mentioned adhesives. 50% pigment for coated paper as main ingredient
0.1g of pigment size liquid containing the following on side A of the base paper
/m2 or more 2g/(lI2 or less, 0.6g/m for B side
2 or less, the A side has a gloss level of 18% or more as measured by JIS-P8142, and the B side uses a penetrating dry offset ink of newspaper off-ring ink (TV = 3 to 4 equivalent) using an RI printing machine. , the print density is 1.0± with a courser densitometer.
0.1, and 1 minute later, commercially available A coated paper with a whiteness of 82 ± 1.5% and a gloss of 62 ± 8% was layered on the printed surface and pressed with a pressure of a nip width of 10 mff1. The A-side has properties suitable for heat set-off printing, and the A-side has properties suitable for heat set-off printing. This is a method for producing offset printing paper, characterized in that the B side has properties suitable for printing using penetrating ink.

本発明では塗布用原紙にクリヤーサイズ液、顔料を含有
するピグメントサイズ液等の塗布組成物を塗布し、乾燥
後、更にスーパーキャレンダー、ソフトキャレンダー、
グロスキャレンダー等のつや掛け装置で処理することが
必須である。本発明は前記した構成としたことからＡ面
には美麗な多色カラー印刷を得るため光沢度（白紙及び
印刷後の光沢度）が要求され、Ｂ面はインキの吸収速さ
及び吸収力で代表されるインキ吸収性（を油度）が重要
である。In the present invention, a coating composition such as a clear size liquid or a pigment size liquid containing a pigment is applied to a base paper for coating, and after drying, a coating composition such as a super calender, a soft calender,
It is essential to process with a polishing device such as a gloss calender. Since the present invention has the above-mentioned configuration, the A side is required to have high glossiness (glossiness on blank paper and after printing) in order to obtain beautiful multicolor printing, and the B side is required to have high ink absorption speed and absorption power. The representative ink absorbency (oil level) is important.

しかしながら、これら２つの適性は二律背反的な要素を
有しており、塗布量を多くするか或いはスーパーキャレ
ンダー等のつや掛け処理条件を強化するとＡ面及びＢ面
とも光沢度は向上するが、表面は緻密になりインキの吸
収性が悪化してしまう。逆に、塗布量を少なくするか或
いはスーパーキャレンダー等のりや掛け処理条件を緩和
するとＡ面及びＢ面ともインキの吸収性が向上し、代わ
りに光沢度が低下する。However, these two aptitudes have contradictory elements; increasing the coating amount or strengthening the polishing conditions using a super calender will improve the gloss of both sides A and B, but the surface becomes dense and ink absorption deteriorates. On the other hand, if the amount of coating is reduced or the conditions for gluing or applying with a super calender are relaxed, the ink absorbency of both sides A and B improves, but the gloss level decreases instead.

本発明はこの問題を解決する為種々検討した結果以下の
如き構成とすることによりこの困難を克服したものであ
る。As a result of various studies to solve this problem, the present invention has overcome this difficulty by adopting the following configuration.

即ち、 （１）原紙はインキ吸収性に優れ且塗布後の紙のつや掛
け処理に際し光沢度の向上効果が大きなバルブを選択し
て抄紙したものである。That is, (1) The base paper is made by selecting a valve that has excellent ink absorption and has a large effect of improving the gloss level during the glossing treatment of the paper after coating.

（２）　印刷用紙のＡ面及びＢ面の特性を差別化する為
塗布組成物の塗布量をＡ面は０．１〜２．０ｇ／１Ｔ１
２、Ｂ面は０〜０．６　ｇ／ｍ２とし、つや掛け処理条
件を選択して、Ａ面は所望の光沢度を得て、Ｂ面は塗布
量の減少により表面の緻密化が軽減され、インキ吸収性
の悪化を防止することができるようにした。(2) In order to differentiate the characteristics of side A and side B of printing paper, the amount of coating composition applied on side A was 0.1 to 2.0 g/1T1.
2. The B side was set at 0 to 0.6 g/m2, and the polishing treatment conditions were selected to obtain the desired gloss level for the A side, and to reduce the densification of the surface by reducing the amount of coating on the B side. This made it possible to prevent deterioration of ink absorbency.

（３）つや掛け処理条件はスーパーキャレンダーの如く
ソフトロールと金属ロールを組み合わせた装置において
は金属ロールに接する紙面の光沢度が向上し、表面の緻
密性が増加するのに対し、ソフトロールに接する紙面の
光沢度及び緻密性の増加の度合は金属ロールに接する面
と異なり少ないので、本発明ではＡ面の金属ロールに接
する回数を多くし、Ｂ面の金属ロールに接する回数を皆
無或いは著しく少ない回数となる如くつや掛け処、理を
施すものである。(3) Regarding the glossing treatment conditions, in a device that combines a soft roll and a metal roll such as a super calender, the glossiness of the paper surface in contact with the metal roll improves and the density of the surface increases, whereas in a machine that combines a soft roll and a metal roll, Since the degree of increase in gloss and density of the paper surface in contact with the paper surface is small unlike that of the surface in contact with the metal roll, in the present invention, the number of times that the A side contacts the metal roll is increased, and the number of times that the B side contacts the metal roll is reduced to none or significantly. Polishing and treatment are applied to reduce the number of times.

本発明において用いられる塗布用原紙は加圧ストーング
ランドバルブ（ＰＧＷ）　、ストーングランドバルブ（
ＧＰ）、レファイナーグランドパルブ（ＲＧＰ）　、サ
ーモメカニカルバルブ（ＴＭＰ）等の機械パルプのうち
少なくとも１種を含有し、望ましくは２０〜８５重量％
の機械バルブを含有し、さらに望ましくはＰＧＷを含有
するものである。このＰＧＷは繊維に結束を含まず柔軟
性があり、繊維長分布はＧＰとＴＭＰよりも中間繊維を
多く含有し、しかもフィブリル化されているので、この
パルプを用いることにより原紙の平滑性及び表面粗さが
向上する。これによって、サイズ液を塗布する際の塗布
ムラが改善され、印刷用紙の光沢が向上し、さらに印刷
時のインキ着肉性が改善されるので、美麗で見映えの良
い印刷物を作ることが可能である。The coating base paper used in the present invention is pressurized stone ground valve (PGW), stone ground valve (
Contains at least one type of mechanical pulp such as GP), refiner gland pulp (RGP), thermomechanical valve (TMP), and preferably 20 to 85% by weight.
The mechanical valve contains a mechanical valve, and more preferably contains a PGW. This PGW has fibers that do not contain any binding and is flexible, has a fiber length distribution that contains more intermediate fibers than GP and TMP, and is fibrillated, so using this pulp can improve the smoothness and surface of the base paper. Roughness is improved. This improves uneven coating when applying the size liquid, improves the gloss of the printing paper, and improves ink adhesion during printing, making it possible to create beautiful and good-looking printed materials. It is.

ＴＭＰの繊維形状はプレスチーミングによって軟化され
たチップが加圧リファイニングされるので解繊が良好な
為繊維のカッティング及び結束繊維が少なくて、良好な
長繊維が得られるこの為、ＴＭＰを原紙に含有させると
、一般に密度が低く、嵩高な原紙となるので、吸油性が
向上しインキセットオフ値を小さくすることができる。The fiber shape of TMP is made by press-refining chips that have been softened by press steaming, which allows for good defibration, so there is less fiber cutting and binding fibers, and good long fibers can be obtained.For this reason, TMP can be used as a base paper. When it is included, the base paper generally has a low density and is bulky, so the oil absorption is improved and the ink set-off value can be reduced.

その他のＧＰＳＲＧＰもそれぞれパルプの有する特徴を
原紙に反映させることができ、さらに脱インキ古紙バル
ブ（ＤＩＰ）も使用することができる。Other GPSRGPs can also reflect the characteristics of pulp in the base paper, and deinking waste paper valves (DIPs) can also be used.

これらの機械バルブは８５重量％以上含有させると印刷
適性は向上するものの、紙の引張り、引裂、及び破裂強
度で代表される紙力が低下し、２０重量％以下では印刷
適性が発現し難くなるので本発明の為には不都合である
。その他のパルプとしては針葉樹及び広葉樹の漂白パル
プ及びセミ漂白パルプが機械パルプ及びＤＩＰと一緒に
使用できる。本発明で使用される塗布用原紙は前記パル
プを原料として従来公知の抄紙機においてバンド、ロジ
ンサイズ剤及びその他の助剤を用いて酸性紙としてまた
必要に応じてバンドを用いない中性紙として填料を原紙
灰分が３〜２０％になる如く添加して抄造されるもので
ある。本発明で使用する灰分を構成する物質としては炭
酸カルシウム及びクレー、ベントナイト、タルク等の珪
酸塩、二酸化チタン等があり、通常の抄紙機において公
知の方法でこれらの物質の一種以上が適宜選択されて紙
の中に含有せしめられる。灰分が３％以下ではＡ面の光
沢度を所望の値にまで上げることが困難であり、逆に、
灰分を高くすると原紙の緻密性が増すので、Ａ面の光沢
度は高くし易いが、Ｂ面のセットオフ値が悪化し、且つ
紙力及び表面強度が低下する傾向があるので、灰分を２
０％以下に調整することが望ましい。Although the printability of these mechanical valves improves when the content is 85% by weight or more, the paper strength represented by the tensile, tearing, and bursting strength of the paper decreases, and when the content is less than 20% by weight, the printability becomes difficult to express. Therefore, this is inconvenient for the present invention. Other pulps that can be used include softwood and hardwood bleached and semi-bleached pulps, along with mechanical pulps and DIP. The base paper for coating used in the present invention is made from the above-mentioned pulp as a raw material and produced in a conventional paper machine using a band, a rosin sizing agent, and other auxiliary agents to produce acidic paper, and if necessary, to produce neutral paper without using a band. Paper is made by adding filler so that the base paper ash content is 3 to 20%. Substances constituting the ash used in the present invention include calcium carbonate, silicates such as clay, bentonite, and talc, and titanium dioxide, and one or more of these substances is appropriately selected in a conventional paper machine using a known method. and contained in the paper. If the ash content is less than 3%, it is difficult to increase the gloss of side A to the desired value;
Increasing the ash content increases the density of the base paper, making it easier to increase the gloss of the A side, but this tends to worsen the set-off value of the B side and reduce paper strength and surface strength.
It is desirable to adjust it to 0% or less.

本発明において使用される塗布組成物は特に限定される
ものではなく、カゼイン、大豆蛋白、酵母蛋白、澱粉及
び酸化澱粉、エステル化澱粉、エーテル化澱粉、カチオ
ン化澱粉等の変性澱粉、セルロース誘導体等の天然接着
剤、スチレン・ブタジェン共重合体、メチルメタクリレ
ート、ブタジェン共重合体等の共役ジエン系共重合体ラ
テックス、アクリル及び／又はメタクリル酸エステルの
重合体又は共重合体等のアクリル系重合体ラテックス及
びエチレン・酢酸ビニル共重合体等の酢酸ビニル共重合
体ラテックスといったアルカリ非感応性あるいはアルカ
リ感応性の合成樹脂エルマジョン等の合成樹脂接着剤の
如き通常の印刷用紙用接着剤の一種類又は一種以上から
なるクリヤーサイズ液又は前記接着剤を主成分としてカ
オリン、クレー、重質炭酸カルシウム、軽質炭酸カルシ
ウム、水酸化アルミニウム、サテンホワイト、二酸化チ
タン、亜硫酸カルシウム、硫酸亜鉛等の無機顔料或いは
プラスチックピグメント及びプラスチックピグメントに
接着剤の性能を合わせ有しているバインダーピグメント
等の有機顔料を５０％以下を含むピグメントサイズ液が
本発明の目的とする紙品質に応じて用いられる。The coating composition used in the present invention is not particularly limited, and includes casein, soybean protein, yeast protein, starch and oxidized starch, modified starch such as esterified starch, etherified starch, and cationized starch, cellulose derivatives, etc. natural adhesives, conjugated diene copolymer latex such as styrene-butadiene copolymer, methyl methacrylate, butadiene copolymer, acrylic polymer latex such as acrylic and/or methacrylic acid ester polymer or copolymer. and alkali-insensitive or alkali-sensitive synthetic resins such as vinyl acetate copolymer latex such as ethylene-vinyl acetate copolymer, etc. One or more kinds of ordinary printing paper adhesives such as synthetic resin adhesives such as Elmazion. The clear size liquid consisting of the above or the adhesive as a main component, inorganic pigments or plastic pigments such as kaolin, clay, heavy calcium carbonate, light calcium carbonate, aluminum hydroxide, satin white, titanium dioxide, calcium sulfite, zinc sulfate, etc. A pigment size liquid containing 50% or less of an organic pigment such as a binder pigment that has both the performance of a plastic pigment and an adhesive is used depending on the paper quality targeted by the present invention.

又、一般に塗布組成物に配合される分散剤、流動変性剤
、消泡剤、防腐剤、潤滑剤、耐水化剤、保水剤、染料の
各種助剤は必要に応じて適宜配合される。目標とする表
面強度、インキ着肉、白紙光沢度、印刷後光沢度、平滑
度、白色度、不透明度等を得る為の配合及び塗布層の蒸
気透過性の低下を防ぐ為の配合は前記顔料、接着剤及び
補助薬品の種類及び添加量を変えて行われる。In addition, various auxiliary agents, such as dispersants, flow modifiers, antifoaming agents, preservatives, lubricants, waterproofing agents, water retention agents, and dyes, which are generally incorporated into coating compositions, may be appropriately incorporated as necessary. The formulation to obtain the target surface strength, ink adhesion, white paper gloss, gloss after printing, smoothness, whiteness, opacity, etc., and the formulation to prevent a decrease in the vapor permeability of the coating layer are the pigments mentioned above. , by changing the types and amounts of adhesives and auxiliary chemicals.

本発明のピグメントサイズ液の顔料含有比率を５０重量
％以下としたのは本発明の如く極めて少ない塗布量にお
いて印刷時のピッキングトラブル防止の為塗布表面に強
度を付与せしめる目的である。The reason why the pigment content ratio of the pigment size liquid of the present invention is set to 50% by weight or less is to impart strength to the coated surface in order to prevent picking troubles during printing when the coating amount is extremely small as in the present invention.

更に、所望されれば、サイズ液に合成サイズ剤及び／又
はポリアクリルアミド系等の合成紙力増強剤を添加し、
使用することもできる。Furthermore, if desired, a synthetic sizing agent and/or a synthetic paper strength enhancer such as a polyacrylamide system is added to the sizing liquid,
You can also use

塗布の方法についても特に限定されるものではなく、２
０−ルサイズプレス、ゲートロールサイズプレス、ブレ
ードメタリングサイズプレス、エアーナイフコーター、
ロールコータ−或いはパドル及びインバーター型のブレ
ードコーターでブレードがベベル及びベント型コーター
更にはビルブレード、ツインブレード、ショートドウエ
ル等の各種ブレードコーター等の通常の各種塗布装置が
適宜用いられる。There are no particular limitations on the method of application, and 2
0-le size press, gate roll size press, blade metaling size press, air knife coater,
Various conventional coating devices can be used as appropriate, such as a roll coater, a paddle and inverter type blade coater with a beveled or bent blade type coater, and various types of blade coaters such as a bill blade, twin blade, and short dwell type.

本発明では前記した塗布組成物を原紙のＡ面及びＢ面に
塗布する際その塗布量は塗布組成物の種類によって若干
具なるが、Ａ面の塗布量は０．１ｇ／ｍ２以上、２ｇ／
ｌ！１２以下、Ｂ面の塗布量は０．６ｇ／ｍ２以下の範
囲内で調整される。In the present invention, when the coating composition described above is applied to sides A and B of the base paper, the amount of application varies depending on the type of coating composition, but the amount of application on side A is 0.1 g/m2 or more, and 2 g/m2 or more.
l! 12 or less, and the coating amount on side B is adjusted within the range of 0.6 g/m2 or less.

塗布量は多くした方が表面強度は強くなり、光沢度、特
に印刷後光沢度が高くなるが、過度の塗布量の増加は塗
布ムラを生じ易くなったり、製造コストの高騰等の問題
があるので得策ではない。又、Ｂ面の塗布量が多い場合
にはセットオフ値が高くなり、このセットオフ値を所望
の水準にしようとスーパーキャレンダー等のつや掛け装
置の処理条件を緩和するとＡ面の光沢度が所望の水準に
達しないことになる。The larger the amount of coating, the stronger the surface strength and the higher the gloss, especially the gloss after printing, but excessive increase in the amount of coating tends to cause uneven coating and increases manufacturing costs. So it's not a good idea. Also, if the amount of coating on side B is large, the set-off value will be high, and if the processing conditions of the polishing device such as a super calender are relaxed in order to bring the set-off value to the desired level, the gloss level of side A will increase. The desired standard will not be reached.

一方、本発明ではＡ面はオフセット多色カラー印刷に適
する性質を持たしめる為Ａ面の光沢度をＪＩＳ−Ｐ８１
４２で測定した値で１８％以上必要である。１８％以下
では本職発明の目的とする美麗なカラー印刷が得難いか
らである。Ｂ面は通常浸透乾燥型インキを使用するが、
凸版印刷及びオフセット印刷のどちらの場合もインキの
吸収速さ及び吸収力即ち吸油性が要求され、この要求が
満足されないとインキが紙面に半乾燥状態で残され、セ
ットオフやラブオフに起因する汚れトラブルを発生する
。このトラブルを解消するにはＢ面の塗布量は少ない方
が都合が良い。On the other hand, in the present invention, the glossiness of side A is set to JIS-P81 in order to give it properties suitable for offset multicolor printing.
It is necessary to have a value of 18% or more as measured at 42. This is because if it is less than 18%, it is difficult to obtain beautiful color printing, which is the object of the present invention. For the B side, penetrating drying ink is usually used.
In both letterpress printing and offset printing, ink absorption speed and absorption power (oil absorption) are required, and if these requirements are not met, the ink will remain on the paper surface in a semi-dry state, resulting in stains caused by set-off and rub-off. cause trouble. To solve this problem, it is better to use a smaller amount of coating on side B.

インキの汚れを判断する指標として一般にセットオフ値
が用いられるが、これは浸透乾燥型インキを使用し印刷
した時の印刷面が印刷していない面をインキで汚す度合
を示し、米国テキサス州に存在するコーサーコーポレー
ションで開発された新しいコンピューターシステムを応
用した濃度計コーサー６１Ｊを用いて印刷面から印刷さ
れていない面へ転写されたインキの濃度を光の反射率か
ら算出したコーサー濃度値のことをいい、コーサー濃度
ｄは ｄ＝１ｏｇｌ／Ｒ，但しＲ：反射率 で示される。The set-off value is generally used as an index to judge ink smearing, but it indicates the degree to which the printed surface smears the unprinted surface when printing with penetrating drying ink. The Cosar density value is the density of ink transferred from the printed surface to the non-printed surface calculated from the reflectance of light using the Cosar 61J densitometer, which is a densitometer that applies a new computer system developed by Cosar Corporation. The causer density d is d=1ogl/R, where R: reflectance.

第１表はコーサー濃度と反射率の関係を示すものである
。Table 1 shows the relationship between causer density and reflectance.

第　　１ 表 通常浸透乾燥型インキを使用して問題を発生していない
新聞用紙の場合、セットオフ値は０．２２〜０．２８の
範囲にあり、本発明のＢ面のセットオフ値も０．２８以
下である必要がある。Table 1 In the case of newsprint that does not cause problems when using normal penetrating drying inks, the set-off value is in the range of 0.22 to 0.28, and the set-off value of side B of the present invention is also 0. Must be .28 or less.

セットオフ値が０．２８を越える場合、インキの紙への
吸収が遅い為、印刷面のインキが印刷機の圧胴に裏移り
する「汚れ」及び印刷面が少しづつずれてしまう「ダブ
リ」というトラブルを発生するので本発明では好ましく
ない。If the set-off value exceeds 0.28, the absorption of ink into the paper is slow, resulting in "stains" in which the ink on the printing surface transfers to the impression cylinder of the printing press, and "doubling" in which the printed surface gradually shifts. This is not preferred in the present invention because it causes such trouble.

この様に本発明のＢ面のセットオフ値を小さくしてイン
キの吸収性を大きくするとは浸透乾燥型インキを使用す
る場合大変重要である。本発明による印刷用紙のＢ面に
おけるインキの吸収を早める好ましい方法の一つにクリ
ヤーサイズ液、ピグメントサイズ液を塗布した印刷用紙
に印刷を施行する前にスーパーキャレンダー等でつや掛
け処理を行い、その際にニップ圧を軽減して印刷用紙の
密度の増加を抑制することが考えられる。この方法では
特にＢ面側のみの密度増加を選択的に抑制することでイ
ンキの吸収を早めるものである。In this way, it is very important to reduce the set-off value of the B side of the present invention and increase the ink absorbency when using a penetrating drying type ink. One of the preferred methods of accelerating the absorption of ink on the B side of printing paper according to the present invention is to perform a polishing treatment using a super calender or the like before printing on the printing paper coated with clear size liquid or pigment size liquid. At that time, it is conceivable to reduce the nip pressure to suppress an increase in the density of the printing paper. In this method, the ink absorption is accelerated by selectively suppressing the increase in density only on the B side.

この目的は例えば、つや掛け装置としてスーパーキャレ
ンダーを使用する場合、本発明による印刷用紙のＡ面が
スーパーキャレンダーの金属ロール（チルドロール）へ
の接触回数が多くなる如く、そして、逆にＢ面は金属ロ
ールへの接触回数が皆無或いは著しく少なくなる如く、
つまりスーパーキャレンダー〇全段数を使用せずバイパ
スして通紙することにより達成できる。The purpose of this is, for example, when using a supercalender as a polishing device, so that side A of the printing paper according to the invention contacts the metal roll (chilled roll) of the supercalender more often, and vice versa. The surface contacts the metal roll at no or very few times,
In other words, this can be achieved by bypassing and passing paper without using all stages of the super calendar.

バイパスして通紙する場合も、上出しで上段のロールを
使用する方が（第２−ｂ図参照）下出し下段ロールを使
用するより（”Ｊ２−ａ図参照）Ｂ面側の密度の抑制を
一層強化することができる。その理由はロールの自重の
多寡がロールニップ面への影響を及ぼすからである。Even when paper is passed by bypass, it is better to use the upper roll for top feed (see figure 2-b) than to use the lower roll for bottom feed (see figure J2-a). The suppression can be further strengthened because the weight of the roll affects the roll nip surface.

本発明ではＡ面の光沢度は１８％以上であることが必須
要件であるので、かような処理によるＢ面の緻密性増加
を抑制しようとしても、スーパーキャレンダー処理条件
には自ずと制約があり、そして全ニップ圧は使用するつ
や掛け装置の種類によっても相違するが、スーパーキャ
レンダーでは３ニツプ処理で１６０〜５００　ｋｇ／ｃ
Ｉｌｌの範囲、１２段１１ニツプ通紙処理で１２００ｋ
ｇ　／　ＣＩ＋において、Ａ面とＢ面の塗布量差が余り
大きくない場合でもＡ面には必要最小限の光沢度を付与
しながらＢ面の緻密性の増加を防止し、セットオフの悪
化を最小限に留めることができる。In the present invention, it is an essential requirement that the glossiness of the A side be 18% or more, so even if it is attempted to suppress the increase in density of the B side due to such processing, there are naturally restrictions on the supercalender processing conditions. , and the total nip pressure varies depending on the type of polishing equipment used, but in the case of a super calender, it is 160 to 500 kg/c with 3 nips.
Ill range, 1200k with 12 stages and 11 nips paper passing process
g/CI+, even if the difference in the amount of coating between side A and side B is not very large, it provides the necessary minimum level of gloss to side A while preventing an increase in the density of side B, thereby preventing deterioration of set-off. can be kept to a minimum.

〔実施例〕〔Example〕

以下に実施例をあげて本発明をより具体的に説明するが
、本発明は勿論これらに限定されるものではない。尚、
本明細書で用いる％は全で重量％である。The present invention will be described in more detail with reference to Examples below, but the present invention is of course not limited to these. still,
All percentages used herein are percentages by weight.

実施例１ 原紙を構成するバルブ組成は、ＮＢＫＰ（６８０ｒｄ　
Ｃ，Ｓ、Ｆ）　２０％、ＴＭＰ　（１００ｍｆＣ１Ｓ、
　ｌ　５０％、ＲＧＰ　（１００ｍ１Ｃ，Ｓ、Ｐ、＞１
０％、ＰＧＷ　（７５ｍｉ’　Ｃ，Ｓ、Ｆ、）よりなる
パルプに、原紙中の灰分が８％となる如く内添用タルク
を添加し、更に、内添用紙力増強剤としてカチオン化澱
粉（玉子ナショナル社製、ケート３２１０）をバルブ当
り１．０％及びサイズ剤（荒ｊ化学社製、５ＰＧ）を０
．３％、硫酸バンドを１、［）％添加して、中質紙、グ
ラビア印刷用紙及び新聞用紙が抄紙可能な抄紙機を用い
絶乾坪量３８．５ｇ／ｍ”の紙を製造した（原紙Ａと呼
称する）。Example 1 The valve composition constituting the base paper was NBKP (680rd
C, S, F) 20%, TMP (100mfC1S,
l 50%, RGP (100m1C,S,P,>1
0%, PGW (75 mi' C, S, F,), talc for internal addition was added so that the ash content in the base paper was 8%, and cationic starch (75 mi' C, S, F,) was added as an internal paper strength enhancer. Kate 3210 (manufactured by Tamago National Co., Ltd.) was added at 1.0% per bulb, and sizing agent (manufactured by Araj Kagaku Co., Ltd., 5PG) was added to 0.
．． 3% and 1% of band sulfate were added to produce paper with an absolute dry basis weight of 38.5 g/m'' using a paper machine capable of producing medium-quality paper, gravure printing paper, and newsprint (base paper). (referred to as A).

一方、酸化変性澱粉（玉子コンスターチ社製。On the other hand, oxidized modified starch (manufactured by Tamago Cornstarch).

玉子エースＡ）を２５重量％スラリーとして、商業ベー
スの装置において２　ｋｇ／ｃｍ２（１４５℃）の生蒸
気を吹き込み９５℃で６０分間保持して蒸煮し、塗布液
を作成した。Egg Ace A) was made into a 25% by weight slurry, and steamed in a commercially based device with 2 kg/cm 2 (145° C.) of live steam and held at 95° C. for 60 minutes to prepare a coating solution.

該塗布液を固形分濃度３％に調整し、実験室テスト用ブ
レードコーター（玉子王宮社製）を用い、ブレードチュ
ーブ圧１．５　ｋｇ　／　Ｃａｌ＋で原紙Ａの一方の面
（Ａ面）に０．３５　ｇ／ｍ”塗布し、実験用ドラム乾
燥機（熊谷理機社製）で塗布面を乾燥した。The coating liquid was adjusted to a solid content concentration of 3%, and a blade coater for laboratory tests (manufactured by Tamako Okyu Co., Ltd.) was used to coat one side (A side) of base paper A with a blade tube pressure of 1.5 kg/Cal+. .35 g/m'' and dried the coated surface using an experimental drum dryer (manufactured by Kumagai Riki Co., Ltd.).

次に、この塗布液を塗布して乾燥した塗布紙の塗布して
いない面（Ｂ面）に固形分濃度を０．４重量％に調整し
た塗布液を０．１ｇ／ω２塗布し、Ａ面と同じように乾
燥した。Next, 0.1g/ω2 of the coating liquid with a solid content concentration of 0.4% by weight was applied to the uncoated side (Side B) of the coated paper that had been coated with this coating liquid and dried. Dry as well.

次に、この印刷用紙を以下の条件で実験室用スーパーキ
ャレンダー（玉子王宮社製）により処理した。Next, this printing paper was processed using a laboratory super calender (manufactured by Tamagookyu Co., Ltd.) under the following conditions.

処理条件　通紙　速　度　　　　４ｍ／分ボトムニップ
圧　　　４０ｋｇ／ｃｍ 通紙　Ａ面二金属ロール　　１回 Ｂ面：コツトンロール１回 該印刷用紙の物性試験を行った結果、Ａ面の光沢度は１
９．１％、Ｂ面のセットオフ値は０．２６で印刷面は両
面とも表面強度も含めて良好であった。Processing conditions Paper passing speed 4 m/min Bottom nip pressure 40 kg/cm Paper passing A side: 1 time with two metal rolls B side: 1 time with cotton roll As a result of physical property tests of the printing paper, the glossiness of the A side was 1
9.1%, and the set-off value of side B was 0.26, and the printed surfaces were good on both sides, including the surface strength.

実施例２ Ａ面塗布量を０．１０　ｇ／ｒｎ２、Ｂ面塗布量を０．
５０ｇ／＋ｎ”とした以外は実施例１と同一条件として
塗布紙を製造した。該塗布紙のＡ面の光沢度は１８．８
％、Ｂ面のセットオフ値は０．２７で印刷面は両面とも
表面強度を含めて良好であった。Example 2 The A side coating amount was 0.10 g/rn2, and the B side coating amount was 0.10 g/rn2.
A coated paper was produced under the same conditions as in Example 1 except that the coating was adjusted to 50g/+n''.The glossiness of side A of the coated paper was 18.8.
%, and the set-off value for side B was 0.27, and the printed surfaces on both sides were good, including the surface strength.

実施例３ ＮＢＫＰ　（５６０ｍ１ＩＣ，Ｓ、Ｆ、）　　２０％、
ＰＧＷ（７５ｍ１ＩＣ０Ｓ、Ｆ、）　５０％及びＴＭＰ
　（１００ｒＲ１Ｃ，Ｓ、Ｆ、）　　３０％よりなるバ
ルブに原紙中の灰分が１３％となる如く内添用タルクを
添加する以外は実施例１と同じ条件で絶乾坪量３８．５
ｇ／ｍ２の紙を製造した（原紙Ｂと呼称する）。Example 3 NBKP (560m1IC,S,F,) 20%,
PGW (75m1 IC0S, F,) 50% and TMP
(100rR1C, S, F,) Absolute dry basis weight 38.5 under the same conditions as Example 1 except that talc for internal addition was added to the bulb made of 30% so that the ash content in the base paper was 13%.
g/m2 paper was produced (referred to as base paper B).

一方、実施例１で作成した酸化変性澱粉塗布液を固形分
濃度５％に調整後、アニオン系紙力増強剤（荒用化学社
製、ボリマセッ）　６００）を絶乾澱粉光たり５０重量
％混合して、原紙Ｂの一方の面（Ａ面）へ０．４５ｇ／
ｍ２、他方の面（Ｂ面）へ０．３０ｇ／ｍ２塗布した。On the other hand, after adjusting the oxidized modified starch coating liquid prepared in Example 1 to a solid concentration of 5%, 50% by weight of anionic paper strength enhancer (manufactured by Aurayo Kagaku Co., Ltd., Bolimaset 600) was mixed with bone-dry starch Hikari. Then, add 0.45g/to one side (side A) of base paper B.
m2, and 0.30 g/m2 was applied to the other side (side B).

紙への塗布方法及びスーパーキャレンダー処理条件は実
施例１と同一である。該塗布紙の物性試験を行った結果
、Ａ面の光沢度は１９．３％、Ｂ面のセットオフ値は０
．２８で印刷面は両面とも表面強度を含めて良好であっ
た。The method of coating the paper and the conditions of supercalender treatment are the same as in Example 1. As a result of physical property tests of the coated paper, the glossiness of the A side was 19.3%, and the set-off value of the B side was 0.
．． No. 28, the printed surfaces on both sides were good including the surface strength.

実施例４ 原紙中の灰分が２０％となる如く内添用タルクを添加し
た以外は実施例３と同一条件で紙を製造したく原紙Ｃと
呼称する）。Example 4 A paper was produced under the same conditions as in Example 3, except that talc for internal addition was added so that the ash content in the base paper was 20% (referred to as base paper C).

実施例３で使用したものと同一の塗布液を原紙Ｃの一方
の面（Ａ面）へ０．３５　ｇ　／ｃｏ２、他方の面（Ｂ
面）へ０．２４　ｇ　／ｍ２塗布した。紙への塗布方法
及びスーパーキャレンダー処理条件は実施例１と同一と
した。The same coating liquid used in Example 3 was applied to one side (A side) of base paper C at 0.35 g/co2, and the other side (B side)
0.24 g/m2 was applied to the surface). The method of coating the paper and the conditions of supercalender treatment were the same as in Example 1.

該塗布紙の物性試験を行った結果、Ａ面の光沢＆は２０
．２％、Ｂ面のセットオフ値は０．２８で印刷面は両面
とも表面強度を含めて良好であった。As a result of the physical property test of the coated paper, the gloss of the A side was 20.
．． 2%, and the set-off value of side B was 0.28, and the printed surfaces on both sides were good including the surface strength.

実施例５ ポリビニルアルコール（日本合成化学社製。Example 5 Polyvinyl alcohol (manufactured by Nippon Gosei Kagaku Co., Ltd.)

コーセナールＴ−３３０８）を固形分３％濃度としてた
塗布液を作成し、該塗布液を原紙Ｂの一方の面（Ａ面）
へ０．５０ｇ／ｍ２、他方の面（Ｂ面）へ０．１２　ｇ
／ｍ’塗布した。紙への塗布方法及びスーパーキャレン
ダー処理条件は実施例１と同一とした。A coating liquid containing Corsenal T-3308) with a solid content of 3% was prepared, and the coating liquid was applied to one side (side A) of base paper B.
0.50 g/m2 to the other side (Side B), 0.12 g to the other side (Side B)
/m' was applied. The method of coating the paper and the conditions of supercalender treatment were the same as in Example 1.

該塗布紙の物性試験を行った結果、Ａ面の光沢度は１８
．４％、Ｂ面のセットオフ値は０．２７で印刷面は両面
とも表面強度を含めて良好であった。As a result of the physical property test of the coated paper, the gloss level of side A was 18.
．． 4%, and the set-off value for side B was 0.27, and the printed surfaces on both sides were good, including the surface strength.

実施例６ 原紙Ｂの一方の面（Ａ面）にのみ実施例１で作成した酸
化変性澱粉を含有する固形分濃度３％の塗布液を０．４
５ｇ／ｍ’塗布し、他方の面（Ｂ面）には塗布液を塗布
しないで塗布紙を製造した。紙への塗布方法及びスーパ
ーキャレンダー処理は実施例１と同一とした。Example 6 Only on one side (side A) of base paper B, 0.4% of the coating liquid containing the oxidized modified starch prepared in Example 1 and having a solid content concentration of 3% was applied.
A coated paper was manufactured by applying 5 g/m' of the coating liquid and not applying the coating liquid to the other side (side B). The method of coating the paper and the super calender treatment were the same as in Example 1.

該塗布紙の物性試験を行った結果、Ａ面の光沢度は１８
．５％、Ｂ面のセットオフ値は０．２６で印刷面として
は両面とも良好であった。表面強度についてはＡ面に比
べて、Ｂ面は塗布液を塗布していない為若干劣っていた
が問題となる程度ではなかった。As a result of the physical property test of the coated paper, the gloss level of side A was 18.
．． 5%, and the set-off value for side B was 0.26, indicating that both sides were good as printing surfaces. Regarding the surface strength, compared to side A, side B was slightly inferior because no coating liquid was applied, but it was not to the extent that it became a problem.

実施例７ 原紙Ｂの一方の面（Ａ面）へのみスチレンブタジェン系
共重合体であるプラスチックピグメントに接着能力を担
持せしめたバインダーピグメント（日本合成ゴム社製、
　ＢＰ−０６４０）と酸化変性澱粉（実施例１で作成し
たもの）との固形分重量比が１＝１となる如く混合して
、更に固形分濃度を１０重量％に希釈して作成した塗布
液を一方の面（Ａ面）に１．２０　ｇ　／ｍ”塗布し、
他方の面（Ｂ面）には塗布液を塗布しないで、塗布紙を
製造した。紙への塗布方法及びスーパーキヤレンダー処
理は実施例１と同じとした。Example 7 A binder pigment (manufactured by Japan Synthetic Rubber Co., Ltd., made by Nippon Gosei Rubber Co., Ltd.) in which a plastic pigment, which is a styrene-butadiene copolymer, had adhesive ability was applied only to one side (side A) of base paper B.
Coating liquid prepared by mixing BP-0640) and oxidized modified starch (prepared in Example 1) such that the solid content weight ratio was 1 = 1, and further diluting the solid content concentration to 10% by weight. Coat 1.20 g/m” on one side (Side A),
A coated paper was manufactured without applying the coating liquid to the other side (side B). The method of coating the paper and the supercalender treatment were the same as in Example 1.

該塗布紙の物性試験を行った結果、Ａ面の光沢度は１９
．４％、Ｂ面のセットオフ値は０．２６で、印刷面とし
ては両面とも良好であった。表面強度についてはＢ面は
Ａ面に比べ若干劣っていたが問題となる程度ではなかっ
た。As a result of a physical property test of the coated paper, the gloss level of side A was 19.
．． 4%, and the set-off value of side B was 0.26, and both sides were good as printing surfaces. Regarding the surface strength, side B was slightly inferior to side A, but it was not to the extent that it became a problem.

実施例８ 原紙Ｂの一方の面（Ａ面）に実施例７で使用した塗布組
成液に塗工用顔料の一種であるカオリン（***国エンゲ
ルハード社製、エクシロン）を配合し、塗布液とした。Example 8 Kaolin (manufactured by Engelhard, West Germany, Exilon), which is a type of coating pigment, was blended with the coating composition liquid used in Example 7 on one side (side A) of base paper B, and the coating liquid and did.

この配合重量比は固形分としてバインダーピグメント３
二酸化変性澱粉５：カオリン２の割合とし、固形分濃度
３重量％に希釈調整して０．３５ｇ／ｍ”塗布した。This blending weight ratio is the binder pigment 3 as solid content.
The ratio was 5:2 of kaolin modified starch dioxide, diluted to a solid concentration of 3% by weight, and applied at 0.35 g/m''.

反対の面（Ｂ面）には前記塗布組成物を固形分濃度１％
に希釈調整して０．１０　ｇ　／ＩＩ＋２塗布した。On the opposite side (side B), the coating composition was applied at a solid content concentration of 1%.
The solution was diluted to 0.10 g/II+2 and applied.

紙の塗布方法及びスーパーキヤレンダー処理は実施例１
と同一とした。The paper coating method and supercalender treatment are as in Example 1.
was made the same as

該塗布紙の物性試験を行った結果、Ａ面の光沢度は２０
．４％、Ｂ面のセットオフ値は０．２８で、印刷面とし
ては両面とも良好であった。表面強度については実施例
１より若干劣るが、問題となる程度ではなかった。As a result of the physical property test of the coated paper, the gloss level of side A was 20.
．． 4%, and the set-off value for side B was 0.28, and both sides were good as printing surfaces. Although the surface strength was slightly inferior to that of Example 1, it was not a problem.

実施例１〜実施例８の試験結果を第２表に示す。The test results of Examples 1 to 8 are shown in Table 2.

実施例９ 原紙Ｂの一方の面（Ａ面）に実施例１のものと同じ塗布
組成物で固形分濃度を４％に希釈して調整した塗布液を
商業ベースのオンマシンブレードコーターで１０００ｍ
　／分の速度で０．３５　ｇ／ｍ２塗布し、他方の面（
Ｂ面）には塗布液を塗布しなかった。Example 9 A coating solution prepared by diluting the same coating composition as in Example 1 to a solid content concentration of 4% was applied to one side (A side) of base paper B using a commercially based on-machine blade coater for 1000 m
Apply 0.35 g/m2 at a speed of /min, and apply on the other side (
No coating liquid was applied to side B).

次に、該塗布紙を以下の条件でスーパーキャレンダー（
***クライネウニ−ハース社製）において処理した。Next, the coated paper was placed in a super calender (
(manufactured by Kleineune Haas, West Germany).

処理条件 通紙速度　　　５００ｍ／分 ボトムニップ圧　　　　１８０　ｋｇ／　ｃｍ全ニップ
圧　　　１６０ｋｇ／ｃｍ 通　　紙 上段の３ニツプ（第２−ｂ図参照） 原紙　上出しく第１図参照） Ａ面：金属ロール　３回：コツトンロール　０回接触 Ｂ面：金Ｉ！ロール　０回：コットンロール　３回接触 全ニップ圧とは紙に加重される各ロールのニップ圧の累
計をいう。Processing conditions Paper passing speed: 500 m/min Bottom nip pressure: 180 kg/cm Total nip pressure: 160 kg/cm Paper passing: 3 nips at the top (see Figure 2-b) Base paper (see Figure 1) Side A: Metal roll 3 times :Kotton roll 0 times contact B side: Gold I! Roll 0 times: Cotton roll 3 times contact Total nip pressure refers to the cumulative total of the nip pressures of each roll applied to the paper.

該塗布紙の物性試験を行った結果、Ａ面の光沢基は１９
．６％、Ｂ面のセットオフ値は０．２７で印刷面は両面
とも表面強度を含めて良好であった口 比較例１ 原紙の一方の面（Ａ面）への塗布量を０．１０ｇ／＋ｙ
＋２、他方の面（Ｂ面）への塗布量を０．６０ｇ／ｌｒ
＋”に変更した以外は実施例１と同一条件で塗布紙を製
造した。As a result of the physical property test of the coated paper, the glossy group on the A side was 19
．． 6%, and the set-off value for side B was 0.27, and the printed surfaces were good on both sides, including the surface strength. Comparative Example 1 The coating amount on one side (side A) of the base paper was 0.10 g/ +y
+2, coating amount on the other side (B side) 0.60g/lr
A coated paper was produced under the same conditions as in Example 1 except that the condition was changed to "+".

該塗布紙の物性試験を行った結果、塗布紙のＡ面の光沢
度は１８．６％、Ｂ面のセットオフ値は０．３０でＡ面
の印刷適性は良好であるが、Ｂ面は浸透乾燥型インキに
よる印刷は不適である。As a result of a physical property test of the coated paper, the glossiness of the A side of the coated paper was 18.6%, and the set-off value of the B side was 0.30, indicating that the printability of the A side was good, but the B side was Printing with penetrating inks is unsuitable.

表面強度は問題となる程度ではなかった。The surface strength was not a problem.

比較例２ 塗布量のみを原紙の一方の面（Ａ面）を０．５３ｇ／［
１１２、他方の面（Ｂ面）を０．３０ｇ／ａ＋”に変更
した以外は実施例４と同一条件で、塗布紙を製造した。Comparative Example 2 Only the coating amount was 0.53 g/[ on one side (A side) of the base paper.
No. 112, coated paper was produced under the same conditions as in Example 4 except that the other side (B side) was changed to 0.30 g/a+''.

該塗布紙の物性試験を行った結果、塗布紙のＡ面の光沢
度は１９．１％、Ｂ面のセットオフ値は０．３１でＡ面
の印刷適性は良好であるが、Ｂ面は浸透乾燥型インキに
よる印刷は不適である。As a result of a physical property test of the coated paper, the glossiness of the A side of the coated paper was 19.1%, and the set-off value of the B side was 0.31, indicating that the printability of the A side was good, but the B side was Printing with penetrating inks is unsuitable.

表面強度は問題となる程度ではなかった。The surface strength was not a problem.

比較例３ 塗布量のみを原紙の一方の面（Ａ面）を０．５０ｇ　／
　ｍ　２、他方の面（Ｂ面）を０．５０ｇ／＋ｍ２に変
更した以外は実施例５と同一条件で、塗布紙を製造した
。Comparative Example 3 Only the coating amount was 0.50g/1 side (A side) of the base paper.
Coated paper was manufactured under the same conditions as in Example 5 except that the other side (Side B) was changed to 0.50 g/+m2.

該塗布紙の物性試験を行った結果、塗布紙のＡ面の光沢
度は１８．４％、Ｂ面のセットオフ値は０．３２でＡ面
の印刷適性は良好であるが、Ｂ面は浸透乾燥型インキに
よる印刷は不適である。As a result of a physical property test of the coated paper, the glossiness of the A side of the coated paper was 18.4%, and the set-off value of the B side was 0.32, indicating that the printability of the A side was good, but the B side was Printing with penetrating inks is unsuitable.

表面強度は良好であった。Surface strength was good.

比較例４ 原紙中の灰分が２５％となる如く内添用タルクの添加量
を変更した（原紙りと呼称する）以外は実施例６と同一
条件で塗布紙を製造した。Comparative Example 4 A coated paper was produced under the same conditions as in Example 6, except that the amount of internally added talc was changed so that the ash content in the base paper was 25% (referred to as base paper).

該塗布紙の物性試験を行った結果、塗布紙のＡ面の光沢
度は２０．５％、Ｂ面のセットオフ値は０．２８で塗布
紙は両面とも印刷適性は所望の水準に到達したが、原紙
り中の灰分が多いことから塗布組成物を塗布しないＢ面
の表面強度が弱く印刷には不適である。As a result of physical property tests of the coated paper, the glossiness of the A side of the coated paper was 20.5%, the set-off value of the B side was 0.28, and the printability of both sides of the coated paper reached the desired level. However, due to the high ash content in the base paper, the surface strength of the B side, which is not coated with the coating composition, is weak, making it unsuitable for printing.

比較例５ 原紙Ｂの一方の面（Ａ面）のみに実施例１のものと同じ
組成物で固形分濃度４％に希釈して調整した塗布液を商
業ベースのオンマシンブレードコーターで１０００ｒｎ
　／分の速度で０．３５ｇ／ｆｆＩ２塗布し、他方の面
（Ｂ面）には塗布液を塗布しなかった。Comparative Example 5 A coating solution prepared by diluting the same composition as in Example 1 to a solid content concentration of 4% was applied to only one side (side A) of base paper B using a commercial on-machine blade coater for 1000 rn.
The coating was applied at a rate of 0.35 g/ffI2/min, and no coating liquid was applied to the other side (side B).

次に、該塗布紙を以下の条件でスーパーキャレンダ−（
米国クライネウェハース社製）において処理した。Next, the coated paper was placed in a super calender (
(manufactured by Kleine Wafers, USA).

処理条件 通紙速度　　　５００ｍ／分 ボトムニップ圧　　　　１８０ｋｇ／ｃｍ全ニップ圧　
　１２００　ｋｇ／ｃｍ 通　紙　　　　　　　　　１２段１１ニツプ（第２−Ｃ
図参照） 該塗布紙の物性試験を行った結果、塗布紙のＡ面の光沢
度は２１．８％、Ｂ面のセットオフ値は０．４２でＡ面
の印刷適性は良好であったが、スーパーキャレンダー処
理条件が厳しい為Ｂ面のセットオフ値は所望の水準に到
達せず、又Ｂ面の表面強度が弱い為印刷には不適である
。Processing conditions Paper passing speed 500m/min Bottom nip pressure 180kg/cm Total nip pressure
1200 kg/cm paper 12 stages 11 nips (2nd-C
(See figure) As a result of physical property tests of the coated paper, the glossiness of the A side of the coated paper was 21.8%, the set-off value of the B side was 0.42, and the printability of the A side was good. The set-off value of the B side did not reach the desired level due to the severe supercalender processing conditions, and the surface strength of the B side was weak, making it unsuitable for printing.

比較例１〜４の物性試験の結果を第３表に、実施例９〜
比較例５の物性試験の結果を第４表に示す。The results of the physical property tests for Comparative Examples 1 to 4 are shown in Table 3, and the results for Examples 9 to 4 are shown in Table 3.
The results of the physical property test for Comparative Example 5 are shown in Table 4.

第　　３ 表 第　　４ 表 第２表〜第４表に記載の品質及び物性試験結果は下記の
試験方法に基づき評価したものである。The quality and physical property test results listed in Tables 3 and 4 were evaluated based on the following test methods.

試験方法 （１）光沢度 村上式グロスメーターで測定した。入射角７５度で測定
を行なうもので試料に光を照射し試料の光沢に応じて反
射光を受光器に受けて測定する。数値の大きいものほど
光沢性は良い。Test method (1) Glossiness Measured using a Murakami gloss meter. The measurement is performed at an incident angle of 75 degrees, and the sample is irradiated with light and the reflected light is received by a light receiver depending on the gloss of the sample. The higher the number, the better the glossiness.

（２）　セットオフ値 印刷濃度がコーサー濃度計で１．０±０．１となる様に
ＲＩ印刷機で新聞オフ輪墨インキ（ＴＶ＝３〜４相当）
の浸透乾燥型オフセットインキを用い印刷して１分後、
この印刷面と米坪１５７ｇ／ｍ２、白色度８２±１．５
％、光沢度６２±８％、厚さ１３２μ山の市販Ａ、コー
ト紙を重ねてニップ輻１０ｍｍの圧力で圧着した時の市
販Ａ。(2) Newspaper off ring ink (equivalent to TV = 3 to 4) using an RI printing machine so that the set-off value printing density is 1.0 ± 0.1 with a courser densitometer.
One minute after printing using the penetrating dry offset ink,
This printed surface and the square meter area are 157g/m2, and the whiteness is 82±1.5.
%, gloss level 62±8%, thickness 132μ pile, and commercially available A when coated paper is stacked and pressed with a nip width of 10 mm.

コート紙へのインキの転写をコーサー濃度計で測定し、
その値をセットオフ値とした。数値の小、さいもの程良
い。The transfer of ink to coated paper is measured using a courser densitometer.
This value was taken as the set-off value. The smaller the number, the better.

（３）ＲＩ表面強度 ＲＩ印刷適性試験機（明製作所製、ＲＩ−２型）を用い
て塗布紙を次の印刷条件で印刷し、印刷物の表面の繊維
の毛羽立ち及び繊維の剥がれ状態を評価した。(3) RI surface strength The coated paper was printed using an RI printability tester (manufactured by Mei Seisakusho, Model RI-2) under the following printing conditions, and the fuzziness of the fibers on the surface of the printed matter and the state of peeling of the fibers were evaluated. .

印刷条件 インキの種類　　　　　ポリブテンインキインキのタッ
ク　　　　１８相当 インキ量　　　　　　　　１．ｏ− 印刷速度　　　　　　　３０ｍ／分 表面強度の評価は目視により次の３段階で行った。Printing conditions Ink type Polybutene ink Ink tack 18 equivalent ink amount 1. o- Printing speed: 30 m/min Surface strength was evaluated visually in the following three stages.

○：織繊維剥がれが１〜３個以下のものロ：３個以上繊
維の剥がれはあるが、全面には発生していないもの △：織繊維剥がれが全面に発生しているか又は剥がれの
一つ一つが大きいもの 〔発胡の効果〕 本発明は機械バルブを含有する原紙にクリヤーサイズ液
、ピグメントサイズ液等の塗布組成物を塗布し、且つや
出し装置の条件を原紙の一方の面（Ａ面）の光沢度が大
きくなる如く選定して処理し、オフセット多色印刷に適
せしめ、Ａ面と反対のＢ面は浸透乾燥型インキでの印刷
に適せしめた為新聞印刷用の印刷設備等の高速輪転機で
片面を単色印刷とし、もう一方の面を第１図は本発明で
用いられるスーパーキャレンダー処理のおけるロールの
繰り出しの状態を示す図、第２−ａ図はスーパーキャレ
ンダー処理における下段の３ニツプに通紙する状態を示
す図、第２−ｂ図は同じく上段の３ニツプに通紙する状
態を示す図、第２−ａ図は同じく全段に通紙する状態を
示す図である。○: 1 to 3 or less woven fibers have peeled off B: 3 or more fibers have peeled off, but not on the entire surface △: Woven fibers have peeled off on the entire surface or one of them has peeled off One is larger [Effect of Hatsu] In the present invention, a coating composition such as a clear size liquid, a pigment size liquid, etc. is applied to base paper containing mechanical valves, and the conditions of the polishing device are changed to one side of the base paper (side A). ) was selected and processed to increase the glossiness, making it suitable for offset multicolor printing, and side B, opposite side A, was made suitable for printing with penetrating drying ink, making it suitable for printing equipment such as newspaper printing. One side is printed in a single color using a high-speed rotary press, and the other side is printed in a single color. Figure 1 shows the state of the roll being fed out in the super calender process used in the present invention, and Figure 2-a shows the state in which the roll is fed out in the super calender process. Figure 2-b is a diagram showing a state in which paper is passed through the three nips in the lower stage, Figure 2-b is a diagram showing a state in which paper is passed through the three nips in the upper stage, and Figure 2-a is a diagram showing a state in which paper is passed through all stages. It is.

Claims (1)

【特許請求の範囲】[Claims] １、機械パルプを含み、且つ填料を原紙の絶乾重量当た
り３〜２０重量％含む原紙に天然接着剤、合成樹脂系接
着剤の一種類又はそれ以上からなるクリヤーサイズ液又
は前記接着剤を主成分として塗布紙用顔料を５０％以下
含むピグメントサイズ液を原紙のＡ面には０．１ｇ／ｍ
＾２以上２ｇ／ｍ＾２以下、Ｂ面には０．６ｇ／ｍ＾２
以下塗布し、Ａ面をＪＩＳ−Ｐ８１４２で測定した光沢
度が１８％以上とし且つＢ面をＲＩ印刷機で新聞オフ輪
墨インキ（ＴＶ＝３〜４相当）の浸透乾燥型オフセット
インキを用い、印刷濃度がコーサー濃度計で１．０±０
．１になるように印刷して１分後、この印刷面に白色度
８２±１．５％、光沢度６２±８％の市販Ａ＿２コート
紙を重ねてニップ幅１０ｍｍの圧力で圧着した時の市販
Ａ＿２コート紙へのインキの転写をコーサー濃度計で測
定した値（セットオフ値）が０．２８以下となる如くつ
や掛け処理を行って、Ａ面にはヒートセットオフ印刷に
適する性質を持たしめ、Ｂ面には浸透乾燥型インキ使用
による印刷に適する性質を持たしめたことを特徴とする
オフセット用印刷用紙の製造方法。1. A clear size liquid consisting of one or more types of natural adhesives, synthetic resin adhesives, or the above adhesives is applied to base paper containing mechanical pulp and 3 to 20% by weight of filler based on the absolute dry weight of the base paper. Pigment size liquid containing 50% or less pigment for coated paper as a component is applied to side A of the base paper at 0.1 g/m
^2 or more and 2 g/m^2 or less, 0.6 g/m^2 for B side
The following coating was applied, and the A side had a gloss level of 18% or more as measured by JIS-P8142, and the B side was coated with a penetrating dry offset ink of newspaper off-ring ink (TV = 3 to 4 equivalent) using an RI printing machine. Print density is 1.0±0 with courser densitometer
．． 1, and after 1 minute, commercially available A_2 coated paper with a whiteness of 82 ± 1.5% and a gloss of 62 ± 8% was layered on the printed surface and pressed with a pressure of a nip width of 10 mm. A_2 A polishing process is performed so that the value (set-off value) measured with a courser densitometer is 0.28 or less for ink transfer to coated paper, and side A is given properties suitable for heat set-off printing. . A method for producing offset printing paper, characterized in that the B side has properties suitable for printing using penetrating drying ink.