JPS585795B2 - Manufacturing method of rough aluminum plate for offset printing - Google Patents
Manufacturing method of rough aluminum plate for offset printingInfo
- Publication number
- JPS585795B2 JPS585795B2 JP14179476A JP14179476A JPS585795B2 JP S585795 B2 JPS585795 B2 JP S585795B2 JP 14179476 A JP14179476 A JP 14179476A JP 14179476 A JP14179476 A JP 14179476A JP S585795 B2 JPS585795 B2 JP S585795B2
- Authority
- JP
- Japan
- Prior art keywords
- aluminum plate
- offset printing
- voltage
- plate
- electrolytic
- 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.)
- Expired
Links
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- Printing Plates And Materials Therefor (AREA)
- Electrochemical Coating By Surface Reaction (AREA)
Description
【発明の詳細な説明】
本発明は電解粗面化処理法によるオフセット印刷版材用
のアルミニウム粗面板の製造法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing an aluminum roughened plate for offset printing plate material by an electrolytic surface roughening treatment method.
一般にオフセット印刷においてアルミニウム板を原板に
用いることは従来から行なわれているが、感光膜の密着
性を良好にし非画線部に保水性を与えるためその表面を
粗面化処理しておくことが必要で、この粗面化処理は製
版工程における製版適性や製版後実際にオフセット印刷
を行なう場合に版材の印刷性能や耐刷力に大きな影響を
及ぼすことから版材製造用の重要な技術とされている。Generally, aluminum plates have been used as original plates in offset printing, but in order to improve the adhesion of the photosensitive film and provide water retention to non-image areas, it is necessary to roughen the surface. This roughening treatment is an important technology for plate manufacturing because it has a great effect on platemaking suitability during the platemaking process and on the printing performance and printing durability of the plate when actually performing offset printing after platemaking. has been done.
オフセット印刷用アルミニウム板の粗面化処理法として
はポール研摩法やブラッシング研摩法などの機械的処理
法が従来からあるが、塩酸や硝酸あるいはこれらを主体
として含む電解液で板面を電気化学的に腐食する電解粗
面化処理法がアルミニウム単板の処理のみならず、スト
リップ板の連続処理に適していることから近年注目され
てきている。Mechanical treatment methods such as pole polishing and brushing polishing have conventionally been used to roughen the surface of aluminum plates for offset printing. The electrolytic surface roughening treatment method that causes corrosion has attracted attention in recent years because it is suitable not only for the treatment of aluminum veneers but also for the continuous treatment of strip plates.
電解粗面化処理法では上記のように塩酸または硝酸ある
いはこれらを主体として含む電解液を使用し、電解槽内
において黒鉛材などの適当な材料を対極とするかあるい
はアルミニウム板同志を向い合せて交流電流によりアル
ミニウム板の電解処理を行なうのが普通である。In the electrolytic surface roughening treatment method, as mentioned above, hydrochloric acid or nitric acid, or an electrolytic solution containing these as a main ingredient, is used, and a suitable material such as graphite material is used as a counter electrode in an electrolytic cell, or aluminum plates are placed facing each other. It is common to electrolytically treat aluminum plates using alternating current.
硝酸またはこれを主体とする電解液を使用したときに得
られる粗面化面は電気化学的に腐食されて生ずるピット
面に更に極く微細なピットが存在する２重構造的なピッ
ト形状を示すが、そのピット深さが全体的に浅いのに対
し、塩酸またはこれを主体とする電解液を使用した場合
にはピット深さは一般に深いが、ピット面が比較的平滑
で、硝酸系の電解液を使用した場合のような複雑な凹凸
面とはならない。The roughened surface obtained when using nitric acid or an electrolyte mainly composed of nitric acid exhibits a double-layered pit shape in which extremely fine pits exist on the pit surface generated by electrochemical corrosion. However, the pit depth is generally shallow, whereas when using hydrochloric acid or an electrolyte mainly composed of hydrochloric acid, the pit depth is generally deep, but the pit surface is relatively smooth, and compared to nitric acid-based electrolytes. It does not create a complex uneven surface like when using liquid.
このような粗面化面のピット構造の違いは版材の印刷性
能や耐刷力に微妙な影響を及ぼし、塩酸系電解液による
粗面板より得られた版材は新聞、雑誌などの耐刷力を重
点とする印刷に適し、また硝酸系電解液で粗面化処理し
た版材は微細な画像を要求されるカレンダー類、カタロ
グ類などの商業美術印刷に適するが耐刷力の点では前者
より劣って印刷部数の比較的少ない印刷物が対象になる
といわれ、それぞれの適用範囲にある程度の限界があっ
た。These differences in the pit structure of the roughened surface have a subtle effect on the printing performance and printing durability of the plate material, and the plate material obtained from the roughened plate using a hydrochloric acid electrolyte has a long printing life for newspapers, magazines, etc. Suitable for printing that emphasizes strength, and plates roughened with nitric acid-based electrolyte are suitable for commercial art printing such as calendars and catalogs that require fine images, but in terms of printing durability, the former is It is said that the target is inferior printed matter with a relatively small number of copies printed, and there are certain limits to the scope of each application.
また、従来の交流電流による電解粗面化法の共通的な問
題として電解条件と電解液組成との間に強い相関性があ
って、均一な粗面板を安定して得ることができる好適電
解条件に対して適応できる電解液組成の範囲がせまく、
両者の関係から交流電解粗面化法では所要のピット形状
を生成し得る電解液組成と好適電解条件の組合せを見出
し得ない場合も多くあった。In addition, a common problem with conventional electrolytic surface roughening methods using alternating current is that there is a strong correlation between electrolytic conditions and electrolyte composition, and suitable electrolytic conditions that can stably obtain uniformly roughened plates. The range of electrolyte compositions that can be applied to
Due to the relationship between the two, it has often been impossible to find a combination of electrolyte composition and suitable electrolytic conditions that can produce the desired pit shape in the AC electrolytic surface roughening method.
発明者らは種々研究の結果、硝酸系電解液を使用してオ
フセット印刷用アルミニウム板の電解粗面化処理を施こ
す際に、交番波形電流を用いてその陽極時電圧■Ａが陰
極時電圧Ｖｏよりも大なるように槽電圧を印加し、陽極
時電気量ＱＡを陰極時電気量Ｑ。As a result of various studies, the inventors found that when electrolytically roughening an aluminum plate for offset printing using a nitric acid-based electrolyte, the anodic voltage (A) was changed to the cathode voltage by using an alternating waveform current. A cell voltage is applied so that it is larger than Vo, and the quantity of electricity QA at the anode is changed to the quantity of electricity Q at the cathode.
よりも大なるように通電量を調整してやるときは二重構
造的な微細凹凸面を有する均一な粗面板が極く短時間の
電解処理で効率的に得られることを見出した。It has been found that when the amount of current applied is adjusted to be greater than , a uniformly roughened plate having a double-structured finely uneven surface can be efficiently obtained in an extremely short electrolytic treatment.
この場合に陽極時間ｔＡを陰極時間ｔＣに等しいか、ま
たは短かくなるように設定することが重要であり、また
電圧調整によって与えられる陰陽極時の電気量とその比
率ＱＣ／ＱＡを適宜変化させることによりピットの径や
深さを任意に調整することができることを見出した。In this case, it is important to set the anode time tA to be equal to or shorter than the cathode time tC, and also change the amount of electricity at the cathode and anode and its ratio QC/QA as appropriate by adjusting the voltage. It has been found that the diameter and depth of the pit can be adjusted arbitrarily by this method.
こうして得られた二重構造的凹凸面を有するアルミニウ
ム粗面板はこのままでも使用も出来るが，さらに硫酸電
解液を用いた陽極酸化処理を施こし板面に硫酸陽極処理
特有の硬質多孔性の保護皮膜を形成さすことによって、
感光膜被着性、湿水保水性および耐摩耗性の一層改善さ
れた版材用粗面板とすることができる。The rough-faced aluminum plate with a double-structured uneven surface can be used as is, but it is further anodized using a sulfuric acid electrolyte to create a hard porous protective coating on the plate surface that is unique to sulfuric acid anodization. By forming
It is possible to obtain a rough plate for printing plates with further improved photosensitive film adhesion, wet water retention, and abrasion resistance.
即ち、本発明はアルミニウム板を硝酸系電解液中で陽極
時電圧ＶＡが陰極時電圧Ｖｃより大なるよう槽電圧を調
整印加した交番波形電流を用い電解粗面化処理を施こし
、ついで硫酸電解液中で陽極酸化処理を施こすことによ
って硬質の保護皮膜を有する粗面化面を形成せしめるこ
とを特徴とするオフセット印刷用アルミニウム粗面板の
製造法である。That is, in the present invention, an aluminum plate is subjected to electrolytic surface roughening treatment in a nitric acid electrolyte using an alternating waveform current in which the cell voltage is adjusted and applied so that the anode voltage VA is larger than the cathode voltage Vc, and then subjected to sulfuric acid electrolysis. This is a method for producing an aluminum roughened plate for offset printing, characterized in that a roughened surface having a hard protective film is formed by performing anodization treatment in a liquid.
本発明における電解粗面化処理において使用される硝酸
系電解液とは０．５〜５重量％の範囲で硝酸単身を含む
水溶液電解液のほか、これに腐食抑制剤、安定化剤とし
て例えば硝酸亜鉛、硝酸アンモニウム、硝酸ナトリウム
などのＮＯ３を含む塩類、モノアミン、ジアミンなどの
アミン類、アルデヒド、ＥＩＤＴＡなどの有機剤、燐酸
、クロム酸、スルホサリチル酸などの酸類の僅かを添加
したものであっても差支えない。The nitric acid-based electrolytic solution used in the electrolytic surface roughening treatment in the present invention is an aqueous electrolytic solution containing nitric acid alone in the range of 0.5 to 5% by weight, as well as corrosion inhibitors and stabilizers such as nitric acid. Salts containing NO3 such as zinc, ammonium nitrate, and sodium nitrate, amines such as monoamines and diamines, organic agents such as aldehydes and EIDTA, and acids such as phosphoric acid, chromic acid, and sulfosalicylic acid may be added. do not have.
また、交番波形電流とは正負の極性を交互に交換せしめ
て得られる波形の電流であって、第１図にその電圧波形
図を例示する。Further, an alternating waveform current is a current having a waveform obtained by alternately exchanging positive and negative polarities, and an example of the voltage waveform diagram is shown in FIG.
第１図においてａは正弦波、ｂは矩形波、Ｃは台形波の
電圧波形を示すが、本発明の交番波電流は上記した電圧
波形のものに限るものではない。In FIG. 1, a shows a voltage waveform of a sine wave, b shows a rectangular wave, and C shows a trapezoidal wave, but the alternating wave current of the present invention is not limited to the voltage waveform described above.
本発明の電解粗面化処理においてはかかる電圧波形を示
す交番波形電流を用い、第１図に示すごとく陽極時電圧
ｖＡが陰極時電圧Ｖｏよりも大なるように槽電圧を印加
することによって陽極時電気量ＱＡが陰極時電気量Ｑ。In the electrolytic surface roughening treatment of the present invention, an alternating waveform current showing such a voltage waveform is used, and as shown in FIG. The amount of electricity at the time QA is the amount of electricity at the cathode Q.
より大なるように陽陰極時の通電量を調整しながらアル
ミニウム板の電解粗面化を行なうものであるが、これに
よって板材表面に極く短時間で均一かつ安定的に適切な
深さを持つ二重構造ピットを有する粗面化面を形成する
ような陽極時電気量ＱＡと陰極時電気量Ｑｃとの比率Ｑ
Ｃ／ＱＡは約０． ４ 〜０． ８の範囲である。The method is to electrolytically roughen the aluminum plate while adjusting the amount of current applied to the anode and cathode to make the surface roughen evenly and stably to the appropriate depth in a very short time. Ratio Q of the amount of electricity at the anode time QA and the amount of electricity at the cathode time Qc such that a roughened surface having double structure pits is formed
C/QA is approximately 0. 4 to 0. The range is 8.
また、好ましい電圧範囲は陽極時電圧ｖＡを基準とする
とき１０〜５０Ｖの範囲であり、陰極時電圧Ｖａは勿論
陽極時電圧■えよりも小さい値をとるように印加する。Further, a preferable voltage range is a range of 10 to 50 V based on the anode voltage vA, and the cathode voltage Va is of course applied so that it takes a smaller value than the anode voltage (I).
また、上記交番波形電流における陽極時間籏は陰極時間
ｔＱとほぼ同一でもよいが、上記した電気量比ＱＣ／Ｑ
Ａの範囲内で陽極時間ｔ４より陰極時間ｔｃを長くする
ことによって電解粗面化処理に要する電気量を低減する
ことができるので、電力消費量や電解液消費量を節減す
ることができる。Further, the anode time period in the above alternating waveform current may be approximately the same as the cathode time tQ, but the above-mentioned electricity quantity ratio QC/Q
By making the cathode time tc longer than the anode time t4 within the range of A, the amount of electricity required for electrolytic surface roughening treatment can be reduced, so power consumption and electrolyte consumption can be reduced.
また、交番波形電流における周波数ｆについては通常の
交流周波数の範囲、すなわち５０Ｈｚないし６０Ｈｚに
限定されるものではないが、周波数を高くする程形成さ
れる粗面化面のピットが細密化する傾向がある。Furthermore, the frequency f of the alternating waveform current is not limited to the normal alternating current frequency range, that is, 50 Hz to 60 Hz, but as the frequency is raised, the pits on the roughened surface that are formed tend to become finer. be.
上記した電解粗面化処理を施こした二重構造的凹凸面を
有するアルミニウム粗面板に対し、さらに硫酸電解液中
で陽極酸化処理を施こす。The aluminum roughened plate having a double structure uneven surface which has been subjected to the electrolytic roughening treatment described above is further subjected to an anodizing treatment in a sulfuric acid electrolyte.
これによって板面に硫酸陽極酸化処理特有の硬質多孔性
の陽極酸化皮膜が形成され、これと前記した二重構造的
凹凸面の形成と相俟って製版処理に際しての感光膜被着
性とオフセット印刷に際しての湿し水保水性の一段の向
上と、耐摩耗性の改善による対刷性の向上をはかること
ができ、従って印刷性能、耐刷性共にすぐれたオフセッ
ト印刷用版材を得ることができる。As a result, a hard porous anodic oxide film unique to sulfuric acid anodization is formed on the plate surface, and this, together with the formation of the double-structure uneven surface described above, improves photoresist film adhesion and offset during plate-making processing. It is possible to further improve dampening water retention during printing and improve printing resistance by improving abrasion resistance, and therefore to obtain an offset printing plate material with excellent printing performance and printing durability. can.
なお硫酸電解液による陽極酸化処理条件は一般的な陽極
酸化処理条件が適用される。Note that general anodic oxidation treatment conditions are applied to the anodic oxidation treatment conditions using a sulfuric acid electrolyte.
次に本発明の実施例について述べる。Next, embodiments of the present invention will be described.
純度９９．５％のアルミニウム板（６００ｍｍｘ１ ５
０ ０ｍｍ×０． ３ｍｍ）を苛性ソーダ溶液で脱脂
洗浄した後、半連続電解装置を用い、濃度１４．１／ｌ
液温２１℃の硝酸電解液を使用し、周波数６０Ｈｚ．陽
極時間ｔ４と陰極時間ｔＱとの比率ｔｃ／ｔＡが２．３
３となるように調整した台形波交番電流を用い、陽極時
電圧ｖＡが１１．２Ｖ、陽極時電圧■ｃが５．Ｏｖの条
件で電解槽内の滞留時間が４０秒となる送り速度でアル
ミニウム板を移動させながら電解粗面化処理を行なった
。99.5% purity aluminum plate (600mm x 1 5
0 0mm x 0. 3mm) with a caustic soda solution, and then using a semi-continuous electrolyzer, the concentration was 14.1/l.
Using a nitric acid electrolyte with a liquid temperature of 21°C, the frequency was 60Hz. The ratio tc/tA of anode time t4 and cathode time tQ is 2.3
Using a trapezoidal wave alternating current adjusted to be 3, the anode voltage vA is 11.2V, and the anode voltage ■c is 5. The electrolytic surface roughening treatment was carried out while moving the aluminum plate at a feed rate such that the residence time in the electrolytic cell was 40 seconds under the condition of Ov.
なお、電流密度は陽極時が８０．ＯＡ／ｄｍ″、陰極時
が２０、ＯＡ／ｄｍ’であった。In addition, the current density is 80. OA/dm'', 20 OA/dm' at the cathode.
次いで水洗後、濃度３０％、温度５５℃の硫酸溶液中に
５分間、浸漬して表面に付着したスマットを除去した後
水洗し、この板を濃度１ ７． ８ ｇ／ｌ、液温１９
゜Ｃの硫酸電解液を用い電流密度ＩＡ／ｄｉで６分４０
秒間直流による陽極酸化処理を施こし水洗乾燥した。Next, after washing with water, the board was immersed in a sulfuric acid solution with a concentration of 30% and a temperature of 55° C. for 5 minutes to remove smut attached to the surface, and then washed with water. 8 g/l, liquid temperature 19
Using sulfuric acid electrolyte at °C and current density IA/di for 6 minutes 40
It was anodized using direct current for seconds, washed with water, and dried.
このようにして得られた粗面板は表面アラサ３．５μ（
Ｈｍａｘ）で全面均一な二重構造的凹凸面を有し、陽極
酸化皮膜の厚みは約２μであった。The roughened plate thus obtained had a surface roughness of 3.5μ (
Hmax), the surface had a uniform double-structure uneven surface over the entire surface, and the thickness of the anodic oxide film was approximately 2 μm.
このようにして得られた粗面板にジアゾ系感光液を用い
て製版処理を施こし、これを用いてオフセット印刷を行
なったところ従来法の硝酸系浴を用いて交流により電解
粗面化処理を行ない以後同様に陽極酸化および製版処理
を施こしたものに較べて湿し水の管理が容易で刷り易く
、画線細部の表現がすぐれた印刷物が得られ、耐刷性も
良好であって５万部の印刷を行なっても何ら変化なく良
好な印刷物が得られた。The thus obtained roughened plate was subjected to a plate-making process using a diazo-based photosensitive liquid, and when offset printing was performed using this, an electrolytic surface roughening process was performed using an alternating current using a conventional nitric acid-based bath. Compared to those that were subjected to the same anodizing and plate-making processes, the dampening water was easier to manage, the prints were easier to print, the details of the lines were better expressed, and the printing durability was also good. Good printed matter was obtained without any change even after 10,000 copies were printed.
以上述べた如く本発明法によるときは、従来印刷性につ
いては良好な実用性があるものの、耐刷力において若干
劣ることのあった硝酸系電解液を使用して、砂目深さの
より深い均一な粗面板を極く短時間の電解処理で効率的
に得ることができ、またそのピット深さも適当な電解条
件を選ぶことによって任意に調整することができるので
、印刷性能および耐刷力の両者を満足するオフセット印
刷用のアルミニウム粗面板を容易に得ることができる上
に、ストリップ板の高速連続処理に適していてまた経済
的効果も大きい。As mentioned above, when using the method of the present invention, a nitric acid-based electrolyte, which has conventionally had good practicality in terms of printability but had a slight inferiority in printing durability, is used to produce deeper grains. A uniformly roughened plate can be efficiently obtained with an extremely short electrolytic treatment, and the depth of the pits can be adjusted arbitrarily by selecting appropriate electrolytic conditions, improving printing performance and printing durability. It is possible to easily obtain a rough aluminum plate for offset printing that satisfies both requirements, and it is also suitable for high-speed continuous processing of strip plates and has great economic effects.
第１図は交番波形電流として得られる電流の電圧波形図
である。
ａ：正弦波、ｂ：矩形波、Ｃ：台形波。FIG. 1 is a voltage waveform diagram of a current obtained as an alternating waveform current. a: sine wave, b: square wave, C: trapezoidal wave.
Claims (1)
が陰極時電圧より犬なるように槽電圧を印加した交番波
形電流によって電解粗面化処理を施したのち、硫酸電解
液中で陽極酸化処理することを特徴とするオフセット印
刷用アルミニウム粗面板の製造法。 ２ 交番波形電流における陽極時間が陰極時間と等しい
か、或は小としたことを特徴とする特許請求の範囲第１
項記載のオフセット印刷用アルミニウム粗面板の製造法
。[Scope of Claims] 1 An aluminum plate is subjected to electrolytic surface roughening treatment using a nitric acid electrolyte and an alternating waveform current applied with a cell voltage such that the voltage at the anode is higher than the voltage at the cathode, and then subjected to an electrolytic surface roughening treatment using a sulfuric acid electrolyte. A method for producing a rough-surfaced aluminum plate for offset printing, which is characterized by anodizing treatment in a medium. 2 Claim 1 characterized in that the anode time in the alternating waveform current is equal to or smaller than the cathode time.
A method for producing a rough aluminum plate for offset printing as described in Section 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14179476A JPS585795B2 (en) | 1976-11-27 | 1976-11-27 | Manufacturing method of rough aluminum plate for offset printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14179476A JPS585795B2 (en) | 1976-11-27 | 1976-11-27 | Manufacturing method of rough aluminum plate for offset printing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5367507A JPS5367507A (en) | 1978-06-16 |
| JPS585795B2 true JPS585795B2 (en) | 1983-02-01 |
Family
ID=15300288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14179476A Expired JPS585795B2 (en) | 1976-11-27 | 1976-11-27 | Manufacturing method of rough aluminum plate for offset printing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS585795B2 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5628893A (en) * | 1979-08-16 | 1981-03-23 | Fuji Photo Film Co Ltd | Carrier for lithography plate and manufacture of said carrier |
| JPS55137993A (en) * | 1979-04-13 | 1980-10-28 | Fuji Photo Film Co Ltd | Production of support member for lithographic printing plate |
| JPS55142695A (en) * | 1979-04-24 | 1980-11-07 | Fuji Photo Film Co Ltd | Manufacture of lithograph supporting base |
| JPS55158299A (en) * | 1979-05-30 | 1980-12-09 | Fuji Photo Film Co Ltd | Manufacture of support for lithographic plate |
| JPH0798430B2 (en) * | 1988-03-31 | 1995-10-25 | 富士写真フイルム株式会社 | Method for producing aluminum support for printing plate |
| JP2627563B2 (en) * | 1989-09-18 | 1997-07-09 | 富士写真フイルム株式会社 | Method for producing support for photosensitive lithographic printing plate |
| US5221442A (en) * | 1991-03-07 | 1993-06-22 | Fuji Photo Film Co., Ltd. | Method and apparatus for electrolytic treatment |
| US5779824A (en) | 1994-08-05 | 1998-07-14 | Fuji Photo Film Co., Ltd. | Aluminum alloy support for planographic printing plate and method for producing the same |
| US5773194A (en) | 1995-09-08 | 1998-06-30 | Konica Corporation | Light sensitive composition, presensitized lithographic printing plate and image forming method employing the printing plate |
| US6514668B1 (en) | 1996-12-26 | 2003-02-04 | Mitsubishi Chemical Corporation | Photosensitive lithographic printing plate |
| US6264821B1 (en) | 1997-12-16 | 2001-07-24 | Fuji Photo Film Co., Ltd. | Process for producing aluminum support for lithographic printing plate |
| US20090110832A1 (en) | 2005-11-01 | 2009-04-30 | Konica Minolta Medical & Graphic, Inc. | Planographic printing plate material, planographic printing plate, planographic printing plate preparing process and printing process employing planographic printing plate |
-
1976
- 1976-11-27 JP JP14179476A patent/JPS585795B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5367507A (en) | 1978-06-16 |
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