EP0514556A1 - Additif pour solution humectante pour plaque lithographique, et solution humectante controlee - Google Patents

Additif pour solution humectante pour plaque lithographique, et solution humectante controlee Download PDF

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Publication number
EP0514556A1
EP0514556A1 EP92900891A EP92900891A EP0514556A1 EP 0514556 A1 EP0514556 A1 EP 0514556A1 EP 92900891 A EP92900891 A EP 92900891A EP 92900891 A EP92900891 A EP 92900891A EP 0514556 A1 EP0514556 A1 EP 0514556A1
Authority
EP
European Patent Office
Prior art keywords
additive
water
damping water
damping
dampening solution
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.)
Withdrawn
Application number
EP92900891A
Other languages
German (de)
English (en)
Other versions
EP0514556A4 (en
Inventor
Hajime Yoshida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nikken Chemical Laboratory Co Ltd
Original Assignee
Nikken Chemical Laboratory Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nikken Chemical Laboratory Co Ltd filed Critical Nikken Chemical Laboratory Co Ltd
Publication of EP0514556A1 publication Critical patent/EP0514556A1/fr
Publication of EP0514556A4 publication Critical patent/EP0514556A4/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N3/00—Preparing for use and conserving printing surfaces
    • B41N3/08—Damping; Neutralising or similar differentiation treatments for lithographic printing formes; Gumming or finishing solutions, fountain solutions, correction or deletion fluids, or on-press development

Definitions

  • damping water concentrate as used in this specification is defined as a liquid which is diluted twice or more with water to prepare damping water (to be fed to the printing plate) .
  • amount for formulation is expressed by weight unless otherwise indicated.
  • Lithographic printing is a system of printing which is based on the principle that water and oil are substantially immiscible with each other. It utilizes a printing plate which is made of an image area (or a lipophilic part (or an ink receptive part) which repels water but accepts oily ink) and a non-image area (or a hydrophilic part (or a water receptive part) which accepts water but repels oily ink).
  • the printing plate In lithographic printing, the printing plate is supplied with water which is customarily called damping water. It is necessary that damping water be fed to the printing plate in adequate proportion to ink so that it is uniformly distributed to the water receptive part and ink receptive part.
  • Damping water serves to prevent the scumming which would otherwise occur during printing.
  • the damping water concentrate which has been in common use is an aqueous solution containing chromate and phosphoric acid (or phosphate) and having an adequate viscosity adjusted with gum arabic or methyl cellulose.
  • damping water supply unit continues improvement in order to meet the recent requirements for higher printing quality and speed and better workability.
  • the improvement has not yet reached the stage at which no skill is required to feed damping water to the printing plate in adequate proportion to ink. Therefore, it is common practice to prepare damping water by incorporating a damping water concentrate with 20-25% of IPA.
  • the thus prepared damping water readily wets the non-image area and facilitates the balanced supplies of ink and damping water. In addition, it reduces the emulsification of ink into damping water. This leads to the improvement of printing quality, printing speed, and workability.
  • the first aspect of the present invention resides in an additive for damping water for lithographic printing, said additive comprising a water-soluble glycol monoalkyl ether selected from the group consisting of di- or tri-ethylene glycol monoalkyl ethers and di- or tri-propylene glycol monoalkyl ethers, and a nonionic surface active agent having a fluoroalkyl group.
  • the second aspect of the present invention resides in a damping water concentrate for damping water which contains said additive in an amount equal to 40-80 wt%.
  • the present invention produces the effect of obviating the necessity of IPA without posing problems in lithographic printing associated with the fill-in of dots in the image area, the scumming of non-image area, the excessive emulsification of ink by the surface active agent, and the foaming by the surface active agent.
  • nonionic surface active agent that can be used in the present invention. Those which are represented by the formula below are preferable. (where R denotes hydrogen or a C1 ⁇ 4 alkyl group.)
  • nonionic surface active agent examples include “Surflon S-145" made by Asahi Glass Co., Ltd. and “Florad FC-170” made by Sumitomo 3M Co., Ltd.
  • the nonionic surface active agent having a fluoroalkyl group lowers the surface tension of damping water even with a very small amount, without causing the emulsification of ink. It should be used in an amount of 0.1-1.0 part for 100 parts of glycol monoalkyl ester. With an amount less than 0.1 part, it does not lower sufficiently the surface tension of damping water. With an amount in excess of 1.0 part, it is liable to cause the emulsification of ink.
  • the additive for damping water which is composed of the above-mentioned glycol monoalkyl ether and specific nonionic surface active agent, is added to a commercial damping water concentrate which is diluted afterward to prepare damping water.
  • the amount of the additive should be 1.5-2.0% or more, which is enough for the FSE value to be not less than 40. Although there are no upper limits, an amount of 4.0-5.0% will be enough. An excess amount produces no additional effect but poses problems associated with anomalous emulsification. It was confirmed by the present inventors that the additive for damping water is as effective as IPA (in terms of FSE) with one-fourth to one-tenth the amount of IPA.

Landscapes

  • Printing Plates And Materials Therefor (AREA)

Abstract

Additif pour solution humectante, comprenant un glycol monoalkyléther aisément hydrosoluble et une quantité minime d'un tensioactif fluoroalkylé non ionique. On peut préparer cette solution humectante en utilisant cet additif sans qu'il soit nécessaire d'employer de l'alcool d'isopropyle, avec un rendement égal à celui obtenu avec l'alcool d'isopropyle.
EP19920900891 1990-12-11 1991-12-04 Additive for dampening solution for lithographic plate and stock dampening solution Withdrawn EP0514556A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP40120290A JPH06206391A (ja) 1990-12-11 1990-12-11 平版印刷版の湿し水用添加剤及び湿し水原液
JP401202/90 1990-12-11

Publications (2)

Publication Number Publication Date
EP0514556A1 true EP0514556A1 (fr) 1992-11-25
EP0514556A4 EP0514556A4 (en) 1993-02-24

Family

ID=18511052

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920900891 Withdrawn EP0514556A4 (en) 1990-12-11 1991-12-04 Additive for dampening solution for lithographic plate and stock dampening solution

Country Status (4)

Country Link
EP (1) EP0514556A4 (fr)
JP (1) JPH06206391A (fr)
CA (1) CA2075045A1 (fr)
WO (1) WO1992010368A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1025991A1 (fr) * 1999-02-02 2000-08-09 Agfa-Gevaert N.V. Procédé de fabrication de plaques d'impression travaillant en positif
US6458510B1 (en) 1999-02-02 2002-10-01 Agfa-Gevaert Method for making positive working printing plates
CN103660667A (zh) * 2013-11-18 2014-03-26 蚌埠市英路光电有限公司 一种商业轮转润版液及其制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02209294A (ja) * 1989-02-10 1990-08-20 Dainippon Ink & Chem Inc 平版印刷用湿し水濃厚液
EP0411283A2 (fr) * 1989-07-22 1991-02-06 Prüfrex-Elektro-Apparatebau Inh. Helga Müller, geb. Dutschke Système de commande pour le carburateur d'une machine à combustion interne
EP0412455A1 (fr) * 1989-08-05 1991-02-13 Kao Corporation Solution de mouillage pour l'impression offset

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5525075B2 (fr) * 1972-05-18 1980-07-03
NL7606078A (nl) * 1975-06-12 1976-12-14 Dow Chemical Co Werkwijze voor het bereiden van een bevochti- gingsoplossing voor lithografische drukken.
CA1228204A (fr) * 1982-03-29 1987-10-20 Richard J. Burns Solution d'encrage
JPS62234992A (ja) * 1986-04-07 1987-10-15 Fuji Photo Film Co Ltd 平版印刷用処理液
JPS63134293A (ja) * 1986-11-27 1988-06-06 Fuji Photo Film Co Ltd 平版印刷版用不感脂化剤
JP2673604B2 (ja) * 1990-10-25 1997-11-05 富士写真フイルム株式会社 平版印刷用湿し水組成物

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02209294A (ja) * 1989-02-10 1990-08-20 Dainippon Ink & Chem Inc 平版印刷用湿し水濃厚液
EP0411283A2 (fr) * 1989-07-22 1991-02-06 Prüfrex-Elektro-Apparatebau Inh. Helga Müller, geb. Dutschke Système de commande pour le carburateur d'une machine à combustion interne
EP0412455A1 (fr) * 1989-08-05 1991-02-13 Kao Corporation Solution de mouillage pour l'impression offset

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPIL Section Ch, Week 9039, Derwent Publications Ltd., London, GB; Class A97, AN 90-295385 & JP-A-2 209 294 (DAINIPPON INK) *
See also references of WO9210368A1 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1025991A1 (fr) * 1999-02-02 2000-08-09 Agfa-Gevaert N.V. Procédé de fabrication de plaques d'impression travaillant en positif
US6458510B1 (en) 1999-02-02 2002-10-01 Agfa-Gevaert Method for making positive working printing plates
CN103660667A (zh) * 2013-11-18 2014-03-26 蚌埠市英路光电有限公司 一种商业轮转润版液及其制备方法
CN103660667B (zh) * 2013-11-18 2016-04-13 蚌埠市英路光电有限公司 一种商业轮转润版液及其制备方法

Also Published As

Publication number Publication date
JPH06206391A (ja) 1994-07-26
WO1992010368A1 (fr) 1992-06-25
CA2075045A1 (fr) 1992-06-12
EP0514556A4 (en) 1993-02-24

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