JPH10251998A - Paper to which measure for preventing forgery is taken - Google Patents
Paper to which measure for preventing forgery is takenInfo
- Publication number
- JPH10251998A JPH10251998A JP5490297A JP5490297A JPH10251998A JP H10251998 A JPH10251998 A JP H10251998A JP 5490297 A JP5490297 A JP 5490297A JP 5490297 A JP5490297 A JP 5490297A JP H10251998 A JPH10251998 A JP H10251998A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- infrared light
- infrared
- forgery
- absorbing layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000758 substrate Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 14
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 230000003449 preventive effect Effects 0.000 claims 1
- 238000007639 printing Methods 0.000 abstract description 12
- 239000004372 Polyvinyl alcohol Substances 0.000 abstract description 7
- 229920002451 polyvinyl alcohol Polymers 0.000 abstract description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract description 6
- 230000002745 absorbent Effects 0.000 abstract description 5
- 239000002250 absorbent Substances 0.000 abstract description 5
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 abstract description 4
- 239000005751 Copper oxide Substances 0.000 abstract description 3
- 229910000431 copper oxide Inorganic materials 0.000 abstract description 3
- ANRHNWWPFJCPAZ-UHFFFAOYSA-M thionine Chemical compound [Cl-].C1=CC(N)=CC2=[S+]C3=CC(N)=CC=C3N=C21 ANRHNWWPFJCPAZ-UHFFFAOYSA-M 0.000 abstract description 3
- FOBPTJZYDGNHLR-UHFFFAOYSA-N diphosphorus Chemical compound P#P FOBPTJZYDGNHLR-UHFFFAOYSA-N 0.000 abstract 1
- 238000000034 method Methods 0.000 description 21
- 239000010408 film Substances 0.000 description 14
- 239000000975 dye Substances 0.000 description 12
- 239000011888 foil Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 239000006096 absorbing agent Substances 0.000 description 9
- -1 polyethylene terephthalate Polymers 0.000 description 7
- 239000000835 fiber Substances 0.000 description 6
- 238000002834 transmittance Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- 239000012209 synthetic fiber Substances 0.000 description 5
- 229920002994 synthetic fiber Polymers 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 239000011122 softwood Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N Methyl ethyl ketone Natural products CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000010009 beating Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000002932 luster Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- XURABDHWIADCPO-UHFFFAOYSA-N 4-prop-2-enylhepta-1,6-diene Chemical compound C=CCC(CC=C)CC=C XURABDHWIADCPO-UHFFFAOYSA-N 0.000 description 1
- JRLTTZUODKEYDH-UHFFFAOYSA-N 8-methylquinoline Chemical group C1=CN=C2C(C)=CC=CC2=C1 JRLTTZUODKEYDH-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 241000609240 Ambelania acida Species 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 240000000797 Hibiscus cannabinus Species 0.000 description 1
- 240000006240 Linum usitatissimum Species 0.000 description 1
- 235000004431 Linum usitatissimum Nutrition 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229920000881 Modified starch Polymers 0.000 description 1
- 239000004368 Modified starch Substances 0.000 description 1
- 229930192627 Naphthoquinone Natural products 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 229920002873 Polyethylenimine Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 239000001000 anthraquinone dye Substances 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- HGAZMNJKRQFZKS-UHFFFAOYSA-N chloroethene;ethenyl acetate Chemical compound ClC=C.CC(=O)OC=C HGAZMNJKRQFZKS-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- YWEUIGNSBFLMFL-UHFFFAOYSA-N diphosphonate Chemical compound O=P(=O)OP(=O)=O YWEUIGNSBFLMFL-UHFFFAOYSA-N 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical compound O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007646 gravure printing Methods 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 240000004308 marijuana Species 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000019426 modified starch Nutrition 0.000 description 1
- 150000002791 naphthoquinones Chemical class 0.000 description 1
- 150000002832 nitroso derivatives Chemical class 0.000 description 1
- WVJVHUWVQNLPCR-UHFFFAOYSA-N octadecanoyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC(=O)CCCCCCCCCCCCCCCCC WVJVHUWVQNLPCR-UHFFFAOYSA-N 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 239000005365 phosphate glass Substances 0.000 description 1
- DLYUQMMRRRQYAE-UHFFFAOYSA-N phosphorus pentoxide Inorganic materials O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 description 1
- 239000001007 phthalocyanine dye Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920005596 polymer binder Polymers 0.000 description 1
- 239000002491 polymer binding agent Substances 0.000 description 1
- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 150000003573 thiols Chemical class 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- ODHXBMXNKOYIBV-UHFFFAOYSA-N triphenylamine Chemical compound C1=CC=CC=C1N(C=1C=CC=CC=1)C1=CC=CC=C1 ODHXBMXNKOYIBV-UHFFFAOYSA-N 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、紙幣、株券、債
券、商品券、宝くじ等の有価証券類の偽造防止に関する
もので、さらに詳しくは、見た目には偽造防止策を施し
てあることが気づかず、電子複写機やカラースキャナ
ー、印刷機等を利用した偽造や改竄をしたときにはその
真偽判定が確実にできる、偽造防止策を施した用紙に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the prevention of counterfeiting of securities such as banknotes, stocks, bonds, gift certificates, lotteries, etc. More specifically, it has been noticed that counterfeiting prevention measures have been taken in appearance. More specifically, the present invention relates to a forgery-prevention sheet that can reliably determine the authenticity of a forgery or falsification using an electronic copying machine, a color scanner, a printing machine, or the like.
【０００２】[0002]
【従来の技術】現在、紙は紙幣をはじめ、株券、債券、
商品券、宝くじ等々の財産的価値を有する有価証券とし
て幅広く使用されており、その様な有価証券類に用いら
れている用紙には容易に偽造又は変造出来ない様に、紙
自身にすかしを施したり、あるいはマイクロ文字や凹
版、隠し文字、蛍光印刷等の特殊な印刷を施したり、金
属光沢を有する箔やホログラム箔などを転写またはシー
ルで施してあるのが一般的である。2. Description of the Related Art At present, paper includes not only banknotes, but also stocks, bonds,
It is widely used as securities with property value such as gift certificates, lotteries, etc., and the paper used for such securities cannot be forged or falsified easily. In general, a special printing such as a micro letter, an intaglio, a hidden letter, a fluorescent printing, or the like, or a foil having a metallic luster, a hologram foil, or the like is transferred or sealed.
【０００３】これらの有価証券類を偽造する場合は主に
印刷による方法と電子複写機による方法があるが、今日
では電子複写機の解像度が格段に良くなり、電子複写機
さえあれば手軽に本物と見分けがつかないくらいの複写
が出来ることから、電子複写による偽造が増加してい
る。この場合、マイクロ文字や隠し文字といったパター
ン印刷法ではオリジナルとコピーを見分けることが困難
になっている。[0003] Forgery of these securities is mainly carried out by a printing method or an electronic copying machine. Today, however, the resolution of the electronic copying machine has been remarkably improved. Copying is indistinguishable, and forgery by electronic copying is increasing. In this case, it is difficult to distinguish the original from the copy by a pattern printing method such as a micro character or a hidden character.
【０００４】そこで、こういった電子複写機を用いた偽
造への対抗手段としては、金属光沢の鏡面反射を有する
箔やホログラム箔またはシールなどの利用が複写防止効
果が高いとして、一部の商品券や保証書などその他いろ
いろと採用されている。これらの手段が有効なのは、金
属光沢を有する箔やホログラムを複写すると、ほとんど
黒く複写されてしまうため一目見て複写物であることが
わかるためである。ところが、この金属光沢を有する箔
やホログラム箔は用紙の上に層を形成しているため、複
写物の該当する部分の上に使用済の箔またはシールを溶
剤等で上手に剥がして張り付けたり、極めて似た箔を作
って張り付けすると本物と見分けがつかないという問題
があった。一方、すかし用紙はそれ自体偽造することが
困難なように思えるが、紙をすくのは手すきでも可能な
ため、手すき用装置があれば手軽にできる。また、スレ
ッドを入れて抄紙する方法もあるがこれらも目に見える
ものは一見けん制の様に見えるが紙をすく技術を持って
いれば比較的容易にできてしまう問題があった。As countermeasures against counterfeiting using such electronic copying machines, the use of foils, hologram foils or seals having a metallic glossy specular reflection is considered to have a high anti-copying effect. Various other things such as tickets and guarantees have been adopted. These means are effective because, when a foil or hologram having a metallic luster is copied, the copy is almost black, so that it can be seen at a glance that the copy is a copy. However, since this metallic glossy foil or hologram foil forms a layer on the paper, the used foil or seal is peeled off with a solvent or the like on the corresponding part of the copy, and There was a problem that if a very similar foil was made and attached, it could not be distinguished from the real one. On the other hand, watermark paper itself seems to be difficult to forge, but since paper can be scooped by hand, it can be easily made with a hand-making device. In addition, there is a method of making paper by inserting a thread. However, even those which are visible at first glance seem to be a control, but there is a problem that it can be relatively easily made if there is a technique of scooping paper.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、以上のよう
な問題点に着目してなされたものであり、その課題とす
るところは、有価証券類がカラーコピーや印刷またはＤ
ＴＰなどでオリジナルと全く見分けがつかないほど精巧
に偽造されたとき及び紙自身から偽造された場合の問題
点を解決することで、真偽判定が確実に可能な用紙を提
供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a method in which securities are color-copied, printed, or printed.
It is an object of the present invention to provide a paper that can be reliably determined as authenticity by solving the problems when it is forged so precisely as to be completely indistinguishable from the original with a TP or when it is forged from the paper itself.
【０００６】[0006]
【課題を解決するための手段】前記目的を達成するた
め、本発明は、紙基材に赤外線領域には吸収性を有する
が可視領域には極めて吸収性の少ない赤外線吸収層をす
き入れることを特徴とする。In order to achieve the above object, the present invention provides a paper base material having an infrared-absorbing layer which has absorptivity in the infrared region but has very low absorptivity in the visible region. Features.
【０００７】また、本発明は、紙基材に、赤外線領域に
は吸収性を有するが可視領域には極めて吸収性の少ない
赤外線吸収層をすき入れ、前記赤外線吸収層がパターン
状であることを特徴とする。Further, according to the present invention, an infrared absorbing layer having an absorbing property in an infrared region but having a very low absorbing property is introduced into a paper base material, and the infrared absorbing layer is patterned. Features.
【０００８】[0008]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照にして詳細に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【０００９】図１は請求項１の発明を示した用紙１の断
面図で、図２はその平面図である。図面からも明らかな
ように、紙基材１及び紙基材２中に赤外線吸収層３が帯
状に形成されている。また、図３は請求項２の発明を示
した用紙５の断面図で、図４はその平面図を示したもの
である。この例では紙基材６及び紙基材７中に３条の赤
外線吸収層８が形成されている。FIG. 1 is a sectional view of a sheet 1 according to the first embodiment, and FIG. 2 is a plan view thereof. As is clear from the drawings, the infrared absorbing layer 3 is formed in a strip shape in the paper base material 1 and the paper base material 2. FIG. 3 is a sectional view of the sheet 5 according to the second aspect of the present invention, and FIG. 4 is a plan view thereof. In this example, three infrared absorbing layers 8 are formed in the paper base 6 and the paper base 7.
【００１０】上記紙基材は紙なら何でもよいが機械的に
強度のあるＯＣＲ用紙や証券用紙が最も適している。証
券用紙の場合、坪量５０〜２００ｇ／ｍ2 のものが使え
るが、この場合あまり厚いと紙中の赤外線吸収層の光透
過率の効果がなくなるので、好ましくは８０〜１２０ｇ
／ｍ2 のものが望ましい。紙基材の原料となる植物繊維
としては、針葉樹や広葉樹、イネ、エスパルト、バガ
ス、麻、亜麻、ケナフ、カンナビスから成るものと、ポ
リエチレンテレフタレート、ポリプロピレン、ポリアク
リレート、ポリ塩化ビニル等のプラスチックから作られ
た合成繊維などが採用できる。The paper base may be any paper, but OCR paper or securities paper having mechanical strength is most suitable. In the case of security paper, a paper having a basis weight of 50 to 200 g / m 2 can be used. In this case, however, if the thickness is too large, the effect of the light transmittance of the infrared absorbing layer in the paper is lost.
/ M 2 is desirable. The plant fiber used as the raw material for the paper base is made of softwood, hardwood, rice, esparto, bagasse, hemp, flax, kenaf, cannabis, and plastics such as polyethylene terephthalate, polypropylene, polyacrylate, and polyvinyl chloride. Synthetic fibers can be used.
【００１１】本発明に用いる紙基材は、前記した植物繊
維または合成繊維等を原料とし、水中にて叩解し抄いて
絡ませた後、脱水・乾燥させて作られる。この時紙基材
は原料であるセルロースの水酸基間の水素結合で繊維間
の強度が得られる。また、紙基材に用いるてん料として
はクレイ、タルク、炭酸カルシウム、二酸化チタン等が
あり、サイズ剤としてはロジン、アルキル・ケテン・ダ
イマー、無水ステアリン酸、アルケニル無水こはく酸、
ワックス等があり、紙力増強剤には変性デンプン、ポリ
ビニルアルコール、ポリアクリルアミド、尿素−ホルム
アルデヒド、メラミン−ホルムアルデヒド、ポリエチレ
ンイミン等があり、これらの材料をそれぞれ抄紙時に加
え、長網抄紙機や円網抄紙機を用いて抄造する。The paper base material used in the present invention is prepared by using the above-mentioned plant fiber or synthetic fiber as a raw material, beaten and entangled in water, dehydrated and dried. At this time, the strength between the fibers is obtained by the hydrogen bonding between the hydroxyl groups of the cellulose as the raw material. The filler used for the paper base is clay, talc, calcium carbonate, titanium dioxide, etc., and the sizing agent is rosin, alkyl-ketene dimer, stearic anhydride, alkenylsuccinic anhydride,
There are waxes and the like, and paper strength enhancers include modified starch, polyvinyl alcohol, polyacrylamide, urea-formaldehyde, melamine-formaldehyde, polyethyleneimine and the like. The paper is made using a paper machine.
【００１２】抄紙方法は、通常の植物繊維紙の製造に用
いられる方法でよく、例えば原料濃度０．３〜５％、好
ましくは０．５〜１．５％の水希薄原料で十分に膨潤さ
せた繊維をよく混練しスダレ・網目状のワイヤー等に流
して並べ、搾水後加温により水分を蒸発させて作られ
る。The paper-making method may be a method used in the production of ordinary plant fiber paper. For example, a sufficient water-saturated raw material having a raw material concentration of 0.3 to 5%, preferably 0.5 to 1.5% is swelled. It is made by kneading the fibers well, laying them out on a slender, mesh-shaped wire, etc., squeezing water and evaporating water by heating.
【００１３】また、植物繊維以外の例えば合成繊維を混
入した紙基材の場合は合成繊維間に水素結合などの結合
力を持たないため結着剤を必要とすることが多いので、
合成繊維比率と結着剤量は、紙基材の強度を落とさない
程度に適宜決めるのが望ましい。Further, in the case of a paper base material mixed with synthetic fibers other than vegetable fibers, for example, a binder is often required since the synthetic fibers do not have a binding force such as hydrogen bond.
It is desirable that the synthetic fiber ratio and the amount of the binder are appropriately determined so as not to reduce the strength of the paper base material.
【００１４】抄紙工程では、一層のみでは地合いの良い
紙基材や坪量が均一な紙基材ができないので、その場合
は通常抄紙機を２基以上並べてすく方法を用いる。そし
て、抄合わせ法や場合によっては混合抄紙法などによ
り、赤外線領域には吸収性を有するが可視領域には吸収
性の極めて少ない赤外線吸収層を帯状にまたはパターン
状に紙基材の中に抄き込む。In the paper making step, a paper base having a good texture and a paper base having a uniform basis weight cannot be obtained with only one layer. In this case, a method of arranging two or more paper machines is usually used. Then, an infrared-absorbing layer having an absorbing property in the infrared region but having an extremely low absorbing property in the visible region is formed into a paper base in a band shape or a pattern shape by a papermaking method or a mixed papermaking method in some cases. Get in.
【００１５】赤外線領域には吸収性を有するが可視領域
には吸収性の極めて少ない赤外線吸収層４，８は、抄紙
時に直接、例えば抄合わせる一層目と二層目の間に適当
な粉体用フィーダーを用いて連続的にのせることで帯状
に入れることができるし、細い透明な薄いフィルム上に
公知の印刷方法で印刷したものをすき込むこんで入れる
ことができるが、この場合はフィルムのある部分が紙基
材より盛り上がるためそこに何かあることが察知されて
しまうためあまり好ましくない。そこで、後で詳述する
ように、ポリビニルアルコールから成るフィルムのよう
な水溶性フィルム支持体の一方に赤外線領域には吸収性
を有するが可視領域には吸収性の極めて少ない赤外線吸
収層をパターン状に印刷して、それを前記と同様に一層
目と二層目の間に入れて抄紙する。この様にすると抄紙
工程中に水中でフィルムが溶解しパターン層部分のみが
残ることになり、前記したような盛り上がりが無くな
る。The infrared-absorbing layers 4 and 8, which have an absorptivity in the infrared region but have a very low absorptivity in the visible region, can be used directly in papermaking, for example, between the first and second layers. It can be put in a strip by continuously putting it using a feeder, or it can be put in by inserting a thing printed by a known printing method on a thin transparent thin film, in this case, It is not so preferable that a certain portion rises above the paper base material so that something is detected there. Therefore, as will be described in detail later, an infrared absorbing layer having an absorbing property in the infrared region but having a very low absorbing property in the visible region is patterned on one side of a water-soluble film support such as a film made of polyvinyl alcohol. , And put it between the first and second layers in the same manner as above to make paper. By doing so, the film dissolves in water during the paper making process, leaving only the pattern layer portion, and the swelling as described above is eliminated.
【００１６】上記の赤外線吸収層を構成する赤外線吸収
剤としては、無機系のものや有機系のものを用いること
ができる。無機系のものとしては、例えば、五二酸化リ
ンを主成分とし、酸化鉄及び／または酸化銅を１．０重
量％以上含むが、好ましくは五二酸化リンを重量％で３
５．０〜８０．０％、酸化鉄及び酸化銅をそれぞれ０〜
３．０％含むものが利用できる。更に、上記リン酸塩ガ
ラスには必要に応じ、以下の化合物を含有し、これを粉
末化したものを用いてもよい。As the infrared absorbing agent constituting the above-mentioned infrared absorbing layer, inorganic or organic infrared absorbing agents can be used. Examples of the inorganic type include phosphorus pentoxide as a main component and iron oxide and / or copper oxide in an amount of 1.0% by weight or more.
5.0 to 80.0%, iron oxide and copper oxide are each 0 to
Those containing 3.0% can be used. Furthermore, the above-mentioned phosphate glass may contain the following compounds, if necessary, and powdered ones thereof may be used.
【００１７】 Ａｌ2Ｏ3 ２．０〜１０．０重量部 Ｂ2Ｏ3 １．０〜３０．０重量部 ＭｇＯ ３．０〜１０．０重量部 ＺｎＯ ０〜 ３．０重量部 Ｋ2Ｏ ０〜１５．０重量部 Ｂａｏ ０〜１００ 重量部 Ｓｒｏ ０〜 １０ 重量部 Ｎｉ，Ｃｏ，Ｓｅ 微量Al 2 O 3 2.0 to 10.0 parts by weight B 2 O 3 1.0 to 30.0 parts by weight MgO 3.0 to 10.0 parts by weight ZnO 0 to 3.0 parts by weight K 2 O 0-15.0 parts by weight Bao 0-100 parts by weight Sro 0-10 parts by weight Ni, Co, Se trace amount
【００１８】また、有機系の赤外線吸収剤としては、ニ
トロソ化合物、ポリメチン（シアニン）系色素、スクア
リリウム系色素、チオールニッケル錯塩、フタロシアニ
ン系色素、トリアリルメタン系色素、インモニウム系色
素、ジインモニウム系色素、ナフトキノン系色素、アン
トラキノン系色素、アズレニウム系色素、トリフェニル
アミン系色素、トリスアゾ系等があり、本発明に適用で
きる赤外線吸収剤としては、特定の波長のみを吸収する
選択吸収色素でもよいが、可視光領域に吸収性が極めて
少ない色素を選択する必要がある。Examples of organic infrared absorbers include nitroso compounds, polymethine (cyanine) dyes, squarylium dyes, thiol nickel complex salts, phthalocyanine dyes, triallylmethane dyes, immonium dyes, and diimmonium dyes. There are naphthoquinone dyes, anthraquinone dyes, azulenium dyes, triphenylamine dyes, trisazo dyes, and the like, and the infrared absorber applicable to the present invention may be a selective absorption dye that absorbs only a specific wavelength. It is necessary to select a dye having extremely low absorption in the visible light region.
【００１９】さらにこれらの赤外線吸収剤を紙基材中に
すき込み、赤外線吸収層を形成する際に用いるフィルム
としては、カルボキシメチルセルロース、メチルセルロ
ース、ポリビニルアルコール、ポリアクリル酸ソーダ、
ポリエチレンオキシド等から成るものを用いることがで
きる。これらの樹脂は、例えば１０〜１００μｍの厚さ
にしてフィルムにするが、薄すぎるとフィルム強度が低
くて抄紙工程中に切れる恐れがあり生産効率が悪く、逆
に厚すぎると工程中にフィルムが溶けきれず抄紙後用紙
になったときその部分が厚くなって何かあることが察知
されてしまうので好ましくは１５〜２５μｍのフィルム
を用いる。Furthermore, these infrared absorbers are incorporated into a paper substrate to form an infrared absorbing layer. Examples of the film used include carboxymethylcellulose, methylcellulose, polyvinyl alcohol, sodium polyacrylate,
What consists of polyethylene oxide etc. can be used. These resins are formed into a film having a thickness of, for example, 10 to 100 μm. If the film is too thin, the film strength is low, and the film may be cut during the papermaking process, resulting in poor production efficiency. When the paper cannot be completely melted and becomes paper after papermaking, the portion becomes thick and it is detected that there is something. Therefore, a film of 15 to 25 μm is preferably used.
【００２０】赤外線吸収層形成に当っては、前記無機系
や有機系の赤外線吸収剤を、例えば塩化ビニル酢酸ビニ
ル系樹脂、飽和ポリエステル樹脂、ポリウレタンエラス
トマー等の適当な高分子バインダーと添加剤、溶剤から
なる混合物中に分散してインキ化したものを、上記ポリ
ビニルアルコールの様な水溶性フィルム上に、オフセッ
ト印刷法、スクリーン印刷法、グラビア印刷法等の印刷
法で文字或いは絵柄として印刷すればよい。In forming the infrared absorbing layer, the inorganic or organic infrared absorbing agent may be added to a suitable polymer binder such as vinyl chloride vinyl acetate resin, saturated polyester resin, polyurethane elastomer and the like, an additive, a solvent, and the like. What was dispersed in a mixture consisting of and made into an ink, on a water-soluble film such as the polyvinyl alcohol, may be printed as characters or patterns by a printing method such as an offset printing method, a screen printing method, or a gravure printing method. .
【００２１】この様にして形成された赤外線吸収層４，
８は、赤外領域の光を照射したときに該赤外線を吸収す
るので、それが無い部分に比べ透過率が低くなり赤外の
領域ではすかしがあるように見える。この層は抄紙時に
抄紙方向に対して帯状にすき入れてもいいが、特にバー
コードや２次元コード文字、数字、マークなどといった
パターンを入れたい場合は一度フィルム上に印刷してか
らフィルムごとすき入れることで得られることができ
る。The infrared absorbing layer 4 thus formed
No. 8 absorbs the infrared rays when irradiated with light in the infrared region, so that the transmittance is lower than that of the portion without the infrared rays, and it looks like there is a watermark in the infrared region. This layer may be inserted in a band shape in the papermaking direction during papermaking, but if you want to insert patterns such as barcodes, two-dimensional code letters, numbers, and marks, etc. It can be obtained by putting.
【００２２】以上の様な構成の本発明の偽造防止策を施
した用紙は、株券、債券、小切手、通帳、商品券、ギフ
ト券、といった証券類の他、伝票、宝くじ、乗車券、定
期券などの証券関連商品に適用できる。The paper having the above-described countermeasures against forgery according to the present invention includes securities such as stock certificates, bonds, checks, passbooks, gift certificates, gift certificates, as well as slips, lotteries, tickets, and commuter passes. And so on.
【００２３】[0023]
【作用】本発明の用紙においては、従来、印刷法で偽造
防止が施されていたため、カラーコピー機やスキャナー
で画像を取り込まれて出力されたり、スキャナーで色分
解して印刷機を用いて印刷して偽造されたり等の問題が
あったところを、紙基材間に可視領域には吸収性が極め
て少なく赤外線領域には吸収性を有する赤外線吸収層を
入れたので、目視ではそれが有ることが全く気づかずに
前記方法で似た様な用紙を使って偽造しても、赤外線を
照射して透過濃度の差を見ることで確実に真偽判定が可
能となる。また、紙自身をすいて偽造した場合も同様な
効果が期待できることは明らかである。In the paper of the present invention, forgery prevention has conventionally been applied by the printing method. Therefore, an image is captured and output by a color copier or a scanner, or printed using a printer after color separation by a scanner. Although there was a problem such as forgery due to the fact that there was an infrared absorption layer between the paper base material that absorbs very little in the visible region and has an absorption in the infrared region, so there is visual inspection However, even if a forgery is performed using a similar sheet by the above method without noticing at all, the authenticity can be reliably determined by irradiating infrared rays and observing the difference in transmission density. It is clear that a similar effect can be expected when the paper itself is forged.
【００２４】また、紙基材中のパターン画像（赤外線吸
収層）は、例えばタングステンハロゲンや半導体レーザ
ーによる７５０ｎｍ，７８０ｎｍ，８１０ｎｍ，８３０
ｎｍ，９０５ｎｍ等の光を透過しないため光の透過率が
低くなって認識できる。従って、このパターン部分と非
パターン部の光の透過率の違いにおいて機械的な読みと
りが可能になる。The pattern image (infrared absorbing layer) in the paper base material is, for example, 750 nm, 780 nm, 810 nm, 830 by tungsten halogen or a semiconductor laser.
Since light having a wavelength of 905 nm or 905 nm is not transmitted, the transmittance of the light is low and the light can be recognized. Therefore, mechanical reading can be performed based on the difference in light transmittance between the pattern portion and the non-pattern portion.
【００２５】[0025]
【発明の実施の形態】以下、本発明の具体的な実施例を
挙げ、詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, specific examples of the present invention will be described in detail.
【００２６】〈実施例１〉実施例１として図１の構成の
ものを以下に説明する。針葉樹パルプを水中で叩解後、
長網式抄紙機を用いてすき合わせ法で第一層目の紙基材
２を５０ｇ／ｍ2 （乾燥時）にすき、第二層目の紙基材
３を５０ｇ／ｍ 2 （乾燥時）にすいたが、この際第一層
目と第二層目間に下記の赤外線吸収剤から成る赤外線吸
収層４を２０ｍｍの幅、５ｇ／ｍ2 ですき入れ、用紙１
を作成した。 赤外線吸収剤 ブリルブライト粉砕品*)（旭ガラス
（株）製）*) ブリルブライト粉砕品は下記組成からなる Ａｌ2Ｏ3 ５．２（重量％） Ｐ2Ｏ5 ７８ ＭｇＯ ５．４ Ｂａｏ ９．０ ＣｕＯ １．７ ＳｒＯ １．０５<Embodiment 1> As Embodiment 1, the configuration of FIG.
These are described below. After beating the softwood pulp in water,
First layer paper base material by lamination method using fourdrinier paper machine
2 at 50 g / mTwo(When dried), the second layer of paper substrate
3 to 50 g / m Two(At the time of drying)
Infrared absorbent consisting of the following infrared absorbent between the eye and the second layer
The collecting layer 4 has a width of 20 mm and 5 g / m.TwoPour paper 1
It was created. Infrared absorbing agent Brill Bright crushed product*)(Asahi glass
(Made by Corporation)*) The crushed brill bright product has the following composition AlTwoOThree 5.2 (% by weight) PTwoOFive 78 MgO 5.4 Bao 9.0 CuO 1.7 SrO 1.05
【００２７】〈実施例２〉実施例２として図３の構成の
ものを以下に説明する。厚さ１５μｍのポリビニルアル
コールフィルムからなる支持体上に下記の構成からなる
３条の赤外線吸収層８をグラビア法により塗布厚約２μ
ｍにて形成した。針葉樹パルプを水中で叩解後、円網式
抄紙機を用いてすき合わせ法で第一層目の紙基材６を７
０ｇ／ｍ2 （乾燥時）にすき、第二層目の紙基材７を５
０ｇ／ｍ 2 （乾燥時）にすいたが、この際第一層目と第
二層目の間に上記で得られたフィルムをすき入れて乾燥
後１２０ｇ／ｍ2 の用紙５を作成した。 赤外線吸収剤 シアニン系赤外線吸収色素ＣＹ−１０
（日本化薬（株）製） ＣＹ−１０ ２．０（重量％） ＢＲ−６０（アクリル樹脂） １９．８ メチルエチルケトン ４０ トルエン ４０<Embodiment 2> As Embodiment 2, the configuration shown in FIG.
These are described below. 15 μm thick polyvinyl alcohol
Consists of the following composition on a support made of coal film
The three infrared absorbing layers 8 are coated by a gravure method with a coating thickness of about 2 μm.
m. After beating softwood pulp in water
The first-layer paper base material 6
0 g / mTwo(During drying), and the second-layer paper
0 g / m Two(At the time of drying).
Pour the film obtained above between the second layer and dry
After 120g / mTwoPaper 5 was prepared. Infrared absorber Cyanine-based infrared absorbing dye CY-10
(Manufactured by Nippon Kayaku Co., Ltd.) CY-10 2.0 (% by weight) BR-60 (acrylic resin) 19.8 Methyl ethyl ketone 40 Toluene 40
【００２８】〈比較例１〉比較例１として図５の構成の
ものを作成した。図５に示す用紙１１は、図１に示す用
紙１とほぼ同じ構成であるが、すき込まれた層の構成部
材が異なっている。即ち、図１の赤外線吸収層４は、赤
外線領域には吸収性を有するが可視領域には極めて吸収
性の少ない部材で構成されているが、図５中の層はカー
ボンブラックで構成されている。<Comparative Example 1> As Comparative Example 1, the one having the structure shown in FIG. The paper 11 shown in FIG. 5 has substantially the same configuration as the paper 1 shown in FIG. 1, but differs in the constituent members of the layer inserted. That is, the infrared absorbing layer 4 shown in FIG. 1 is made of a member having an absorbing property in the infrared region but having a very low absorbing property in the visible region, but the layer in FIG. 5 is made of carbon black. .
【００２９】〈比較例２〉比較例２として図６の構成の
ものを作成した。図６に示す用紙は、図３に示す用紙５
とほぼ同じ製造方法で作られたものであるが、赤外線吸
収層の構成部材、形成方法が若干異なっている。即ち、
図３の赤外線吸収層８は前述のように、ポリビニルアル
コールフィルムからなる支持体上に赤外線吸収層から成
るパターンを設けたものをすき入れて構成したもので、
抄紙された時には支持体は用紙中に同化され、赤外線吸
収層８のみが、紙基材間に位置している。一方、図６の
赤外線吸収層１８は、ポリエチレンテレフタレートフィ
ルムから成るポリエチレンテレフタレート層１９上に赤
外線吸収剤から成るパターンを設けたものをすき入れて
構成したもので、抄紙後もポリエチレンテレフタレート
層１９は赤外線吸収層１８とともに紙基材間に同化され
ずに残っている。<Comparative Example 2> As Comparative Example 2, one having the structure shown in FIG. The sheet shown in FIG. 6 is the sheet 5 shown in FIG.
Although it is made by the same manufacturing method as that of the above, the constituent members and the forming method of the infrared absorbing layer are slightly different. That is,
As described above, the infrared absorbing layer 8 in FIG. 3 is formed by squeezing a substrate provided with a pattern made of an infrared absorbing layer on a support made of a polyvinyl alcohol film.
When the paper is made, the support is assimilated into the paper, and only the infrared absorbing layer 8 is located between the paper bases. On the other hand, the infrared absorbing layer 18 shown in FIG. 6 is formed by piercing a polyethylene terephthalate layer 19 made of a polyethylene terephthalate film provided with a pattern made of an infrared absorbing agent. It remains without being assimilated between the paper substrates together with the absorbing layer 18.
【００３０】これらの実施例１，２と比較例１，２の用
紙にタングステンハロゲンの光を当ててラッテン１０６
フィルター（イーストマン・コダックス社製）及びピー
ク波長が９０５ｎｍの赤外フィルターを通してその透過
率を測定した比較結果を表−１に示す。 透過率（％）＝（透過した光量）／（全光量）The paper of Examples 1 and 2 and Comparative Examples 1 and 2 were exposed to tungsten halogen light to
Table 1 shows the comparison results obtained by measuring the transmittance through a filter (manufactured by Eastman Kodax) and an infrared filter having a peak wavelength of 905 nm. Transmittance (%) = (transmitted light quantity) / (total light quantity)
【００３１】[0031]
【発明の効果】比較例１では、機能的には実施例１〜２
と何ら変わらない機能を持つが、すき込んだ層がカーボ
ンブラックから成るために見た目に何かあることが一目
みてわかり、それが何であるか解析されて偽造されるお
それがある。更に、比較例２にしても同様でスレッドの
部分のみが盛り上がるため比較例１と同様な危険にさら
されるといった問題があることは明白である。一方、本
発明の用紙は、いままで容易に偽造または変造ができな
い様に、紙自身にすかしを施したり、あるいはマイクロ
文字や凹版、隠し文字、蛍光印刷等の特殊な印刷を施し
たり、金属光沢を有する箔やホログラム箔などを転写ま
たはシールで施してあったのが、紙基材に、赤外線領域
には吸収性を有するが可視領域には極めて吸収性の少な
い赤外線吸収層をすき入れたため、見た目には偽造防止
策が施されていることが全く察知されないで真偽判定が
容易になり、偽造や変造することが難しくなった。ま
た、上記赤外線領域には吸収性を有するが可視領域には
極めて吸収性の少ない赤外線吸収層をパターン化するこ
とで、機械読み取り可能な固定情報を入れることができ
るようになり、例えば搬送装置を具備するリーダーに対
する機械読み取り作業も可能となることが実施例１〜２
からわかる。According to Comparative Example 1, functionally, Examples 1 to 2
Although it has the same function as the above, it can be seen at a glance that there is something visually because the buried layer is made of carbon black, and there is a risk of being analyzed and forged. Further, it is apparent that the same problem occurs in the comparative example 2 that only the thread portion is swelled, so that the same risk as in the comparative example 1 is posed. On the other hand, the paper of the present invention may be provided with a watermark on the paper itself, or may be subjected to special printing such as micro-characters, intaglio, hidden characters, fluorescent printing, etc., so that it cannot be easily forged or falsified. Glossy foils and hologram foils were transferred or sealed, but because the paper base material had an infrared-absorbing layer that had absorption in the infrared region but had very little absorption in the visible region. However, it is easy to judge the authenticity without apparently detecting that forgery prevention measures are taken, and it becomes difficult to forge or falsify. Further, by patterning an infrared absorbing layer having an absorbing property in the infrared region but having a very low absorbing property in the visible region, it becomes possible to store machine-readable fixed information. Embodiments 1 and 2 show that a machine reading operation for a reader provided can be performed.
Understand from.
【００３２】[0032]
【図１】本発明の一例を示す断面図である。FIG. 1 is a sectional view showing an example of the present invention.
【図２】図１の平面図である。FIG. 2 is a plan view of FIG.
【図３】本発明の他の例を示す断面図である。FIG. 3 is a sectional view showing another example of the present invention.
【図４】図３の平面図である。FIG. 4 is a plan view of FIG. 3;
【図５】本発明の一比較例の断面図である。FIG. 5 is a sectional view of a comparative example of the present invention.
【図６】本発明の他の比較例の断面図である。FIG. 6 is a cross-sectional view of another comparative example of the present invention.
１，５‥‥本発明の用紙 ２，３，６，７，１２，１３，１６，１７‥‥紙基材 ４，８，１８，‥‥赤外線吸収層 １４‥‥カーボンブラック層 １９‥‥ポリエチレンテレフタレート層 1,5 Paper of the present invention 2,3,6,7,12,13,16,17 Paper base 4,8,18, Infrared absorbing layer 14 Carbon black layer 19 Polyethylene Terephthalate layer
Claims (2)
が可視領域には極めて吸収性の少ない赤外線吸収層をす
き入れたことを特徴とする偽造防止策を施した用紙。An anti-counterfeiting paper characterized in that an infrared-absorbing layer which absorbs in the infrared region but has very low absorptivity in the visible region is inserted into a paper substrate.
が可視領域には極めて吸収性の少ない赤外線吸収層をす
き入れ、該赤外線吸収層がパターン状であることを特徴
とする偽造防止策を施した用紙。2. A forgery characterized in that an infrared absorbing layer having an absorption in the infrared region but having a very low absorption in the visible region is inserted into a paper base material, and the infrared absorbing layer is patterned. Preventive paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5490297A JPH10251998A (en) | 1997-03-10 | 1997-03-10 | Paper to which measure for preventing forgery is taken |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5490297A JPH10251998A (en) | 1997-03-10 | 1997-03-10 | Paper to which measure for preventing forgery is taken |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10251998A true JPH10251998A (en) | 1998-09-22 |
Family
ID=12983547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5490297A Pending JPH10251998A (en) | 1997-03-10 | 1997-03-10 | Paper to which measure for preventing forgery is taken |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10251998A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004142175A (en) * | 2002-10-23 | 2004-05-20 | Tokushu Paper Mfg Co Ltd | Thread having truth or falsehood determining function and forgery preventive sheet using the same |
| JP2007153984A (en) * | 2005-12-02 | 2007-06-21 | Dainippon Ink & Chem Inc | Infrared absorbing printing ink composition |
| JP2008045231A (en) * | 2006-08-14 | 2008-02-28 | National Printing Bureau | Multi-layered sheet and method for determining true or false |
| WO2010089943A1 (en) * | 2009-02-04 | 2010-08-12 | 富士フイルム株式会社 | Printing ink or toner containing dihydroperimidine squarylium compound, printed matter, method for detection of information, and method for ascertaining the genuineness of articles or substrates |
| WO2014030542A1 (en) * | 2012-08-20 | 2014-02-27 | 共同印刷株式会社 | Watermarked forgery-proof printing medium |
-
1997
- 1997-03-10 JP JP5490297A patent/JPH10251998A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004142175A (en) * | 2002-10-23 | 2004-05-20 | Tokushu Paper Mfg Co Ltd | Thread having truth or falsehood determining function and forgery preventive sheet using the same |
| JP2007153984A (en) * | 2005-12-02 | 2007-06-21 | Dainippon Ink & Chem Inc | Infrared absorbing printing ink composition |
| JP2008045231A (en) * | 2006-08-14 | 2008-02-28 | National Printing Bureau | Multi-layered sheet and method for determining true or false |
| WO2010089943A1 (en) * | 2009-02-04 | 2010-08-12 | 富士フイルム株式会社 | Printing ink or toner containing dihydroperimidine squarylium compound, printed matter, method for detection of information, and method for ascertaining the genuineness of articles or substrates |
| JP2010180308A (en) * | 2009-02-04 | 2010-08-19 | Fujifilm Corp | Printing ink and toner containing dihydroperimidine squarylium compound and method for detecting information using the same |
| WO2014030542A1 (en) * | 2012-08-20 | 2014-02-27 | 共同印刷株式会社 | Watermarked forgery-proof printing medium |
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