EP0219719A1 - Composition de mouillage pour l'impression lithographique - Google Patents
Composition de mouillage pour l'impression lithographique Download PDFInfo
- Publication number
- EP0219719A1 EP0219719A1 EP86113359A EP86113359A EP0219719A1 EP 0219719 A1 EP0219719 A1 EP 0219719A1 EP 86113359 A EP86113359 A EP 86113359A EP 86113359 A EP86113359 A EP 86113359A EP 0219719 A1 EP0219719 A1 EP 0219719A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- dampening
- ppm
- dampening solution
- solutions
- 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.)
- Granted
Links
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
- the invention relates to dampening solutions or dampening solution concentrates for offset printing.
- So-called “fountain solution” is required in offset printing in order to keep the non-image areas of the printing plates free of printing ink during the printing process while the printing ink is being applied to the printing plates clamped on the printing cylinders. It is necessary for the quality of the print that the fountain solution or dampening solution wets the non-image areas of the printing plates well and furthermore properly emulsifies with the printing ink applied in the image areas.
- dampening solutions for offset printing essentially consist of water, to which small amounts of modifying additives such as pH-regulating substances, humectants, wetting agents, film formers, preservatives and, if appropriate, water-miscible organic solvents are added.
- modifying additives such as pH-regulating substances, humectants, wetting agents, film formers, preservatives and, if appropriate, water-miscible organic solvents are added.
- the fountain solution is usually prepared by the printer itself before the printing process, the modifying additives now being predominantly in the form of prefabricated fountain solution additives or dampening solution concentrates provided by the relevant specialist supply trade and only need to be added to water or diluted with water.
- dampening solutions of this type can lead to signs of corrosion on the parts of the printing press that come into contact with them, in particular on the printing cylinders, which are predominantly made of nickel metal or have a nickel coating.
- the signs of corrosion can show up in the dissolution of nickel metal on the cylinder surfaces up to severe cases of pitting, especially in the contact areas between the printing plates and printing cylinders.
- the consequences are dimensional changes that can have a negative impact on the quality of the printing result, shorter downtimes of the printing cylinders and shorter runs, as well as serious damage to the printing press.
- the dampening solutions were organic zinc salts such as zinc gluconate and zinc glucoheptonate, water-soluble inorganic polyphosphates, phenylarsone Acid and derivatives thereof, propargyl compounds, thiourea and derivatives thereof added as corrosion inhibitors.
- organic zinc salts such as zinc gluconate and zinc glucoheptonate
- water-soluble inorganic polyphosphates such as zinc gluconate and zinc glucoheptonate
- water-soluble inorganic polyphosphates such as zinc gluconate and zinc glucoheptonate
- phenylarsone Acid and derivatives thereof water-soluble inorganic polyphosphates
- propargyl compounds propargyl compounds
- thiourea and derivatives thereof added as corrosion inhibitors.
- the inhibitory effect of I-benzotriazole is only reasonably sufficient only in a relatively mildly acidic environment around pH 5 and higher, but is inadequate for dampening solutions with a lower pH.
- the invention thus relates to dampening solutions or dampening solution concentrates for offset printing which contain copper ions.
- the invention further relates to dampening solutions or dampening solution concentrates for offset printing, which also have a silicate content.
- the invention also relates to a method for preventing corrosion phenomena caused by dampening solutions on offset printing presses, in which copper ions are added to the dampening solutions used or their concentrates.
- a copper ion content of only 0.1 ppm in the ready-to-use dampening solution results in a reduction of the nickel removal by approx. 90% in comparison with a corresponding dampening solution which does not contain any corrosion inhibitors.
- Higher levels of copper ions in the ready-to-use fountain solution, for example in of the order of 1-10 ppm are even more effective. However, even higher concentrations are generally not economical.
- the removal of nickel is practically completely prevented if the dampening solution additionally contains silications, of the order of magnitude of 1-1000 ppm, preferably 10-500 ppm.
- the amounts of copper ions and, if necessary, of silications required to prevent corrosion can be added in the form of corresponding salts to the ready-to-use dampening solutions of the usual composition before the actual use in the printing process.
- all copper salts that are readily water-soluble and release copper ions in an aqueous medium are suitable.
- Suitable copper salts are, for example, copper sulfate, copper nitrate, copper acetate and copper chloride.
- Preferred silicate suppliers are, for example, alkali metal silicates such as sodium water glass and potassium water glass.
- dampening solution concentrates are usually concentrated aqueous solutions, but occasionally also solid, powder, tablet or pasty products, which contain the additives required for fountain solutions in offset printing.
- the ready-to-use dampening solutions are prepared from these concentrates by diluting or dissolving in water to about 1-10%, preferably 2-5%, solutions. Due to the locally differing and frequently varying process water quality and their experience with the dampening solution, which is difficult to calculate, it is advisable to use treated water, preferably demineralised water or water with a hardness of 8-12 ° dH, when preparing the dampening solution.
- the dampening solution concentrates generally contain, in mostly empirically determined, often different proportions, the most diverse substances controlling the properties of the dampening solution. They practically always contain pH regulators, which usually bring about a pH in the range of about 3-6, usually around pH 5. Citrate buffers are mainly used for this. Furthermore, these concentrates can contain humectants, mostly based on polyalcohols such as glycols, glycerol, sorbitol, hexitol or polyglycols, film formers such as gum arabic, wetting agents such as cationic, anionic, nonionic or amphoteric surfactants, preferably nonionic surfactants, and often also softeners, for example Complexing agents like EDTA.
- polyalcohols such as glycols, glycerol, sorbitol, hexitol or polyglycols
- film formers such as gum arabic
- wetting agents such as cationic, anionic, nonionic or amphoter
- these concentrates usually still contain commercially available preservatives which have an antimicrobial and / or antifungal effect.
- dampening solution concentrates also contain solubilizing substances such as water-compatible organic solvents, mostly alcohols such as methanol, ethanol or isopropanol, for the purpose of uniform dissolution of the different ingredients.
- such dampening solution concentrates with the necessary quanta of copper ions or, if necessary, also of silications can also be advantageously added to prevent corrosion.
- the copper ion content is about 0.1-1000 ppm, preferably 1-500 ppm
- the silicate content is 10-10000 ppm, preferably 100-5000 ppm.
- Typical dampening solution concentrates according to the invention contain, for example, 5-15% by weight, preferably around 10% by weight glycerol, 2-10% by weight, preferably around 5% by weight citrate buffer, 1-5% by weight, preferably approximately 3% by weight Gum arabic, about 1% by weight of preservative, 3-10% by weight, preferably about 5% by weight of isopropanol and 0.0001-0.05% by weight of copper nitrate (corresponding to about 1-500 ppm of copper ions) and optionally 0.01-0.5 wt .-% sodium silicate (corresponding to about 100-5000 ppm silications).
- a dampening solution concentrate is prepared The solution has a pH of 4.0. It is used in the form of a 4% aqueous solution (in demineralized water) as a fountain solution in a known manner in offset printing.
- a dampening solution concentrate is prepared
- the solution has a pH of 4.2. It is used in the form of a 4% aqueous solution (in demineralized water) as a fountain solution in a known manner in offset printing.
- a dampening solution concentrate was first prepared as in Example 1, but without copper nitrate. A series of dampening solutions in the form of 4% aqueous solutions were then produced from this. Corrosion inhibitors according to the invention and known corrosion inhibitors were then added to this dampening solution, partly in different concentrations.
- Nickel tubes of 3 cm in diameter were then immersed in these sample solutions to a depth of approximately 4 cm and exposed to the action of the respective solution in question for a relatively long time.
Landscapes
- Printing Plates And Materials Therefor (AREA)
- Rotary Presses (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3536485 | 1985-10-12 | ||
DE19853536485 DE3536485A1 (de) | 1985-10-12 | 1985-10-12 | Feuchtmittel fuer den offsetdruck |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0219719A1 true EP0219719A1 (fr) | 1987-04-29 |
EP0219719B1 EP0219719B1 (fr) | 1990-01-17 |
Family
ID=6283462
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86113359A Expired - Lifetime EP0219719B1 (fr) | 1985-10-12 | 1986-09-29 | Composition de mouillage pour l'impression lithographique |
Country Status (4)
Country | Link |
---|---|
US (1) | US4798627A (fr) |
EP (1) | EP0219719B1 (fr) |
JP (1) | JPS6295292A (fr) |
DE (2) | DE3536485A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998051512A1 (fr) * | 1997-05-13 | 1998-11-19 | Dc Druck Chemie Gmbh | Agent d'humidification pour l'impression offset |
CN108819452A (zh) * | 2018-05-15 | 2018-11-16 | 何治伟 | 一种印刷润版液 |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3830467A1 (de) * | 1988-09-08 | 1990-03-15 | Hoechst Ag | Feuchtmittel fuer den offsetdruck |
US4935058A (en) * | 1989-04-14 | 1990-06-19 | Core-Guard Industries, Inc. | Coating composition to prevent corrosion on metals |
JP2662828B2 (ja) * | 1990-10-25 | 1997-10-15 | 富士写真フイルム株式会社 | 平版印刷用湿し水組成物及び平版印刷方法 |
US5366784A (en) * | 1991-02-26 | 1994-11-22 | Herbison Paul R | Corrosion inhibiting offset printing blanket |
JPH0796344B2 (ja) * | 1991-03-22 | 1995-10-18 | 東洋インキ製造株式会社 | 平版印刷湿し水用添加剤およびその用途 |
DE4220550A1 (de) * | 1991-07-04 | 1993-01-14 | Hostmann Steinberg Gmbh | Feuchtmittelkonzentrat und feuchtmittel und deren verwendung beim offset-druckverfahren |
US5256190A (en) * | 1992-03-16 | 1993-10-26 | Barth Thomas M | Universal chemical system for offset printing |
US6488754B2 (en) | 2000-11-29 | 2002-12-03 | Grain Processing Corporation | Lithographic dampening solution and method for dampening a lithographic plate |
DE10238874A1 (de) * | 2002-08-24 | 2004-03-04 | Koenig & Bauer Ag | Verfahren und Vorrichtung zur Befeuchtung des Plattenzylinders, insbesondere bei alkoholarmen oder alkoholfreiem Druck |
DE102004017054A1 (de) * | 2004-04-07 | 2005-10-27 | Koenig & Bauer Ag | Verfahren und Vorrichtung zur Befeuchtung des Plattenzylinders, insbesondere bei alkoholarmen oder alkoholfreiem Druck |
JP5343575B2 (ja) * | 2009-01-20 | 2013-11-13 | 凸版印刷株式会社 | オフセット印刷用湿し水定量希釈装置 |
JP5571009B2 (ja) * | 2011-01-28 | 2014-08-13 | 三菱製紙株式会社 | 感熱型平版印刷版の印刷方法 |
EP3354476B1 (fr) | 2015-04-28 | 2019-07-03 | Sicpa Holding Sa | Solution de mouillage écologique pour procédé d'impression offset humide et un tel procédé |
TW201708435A (zh) | 2015-07-01 | 2017-03-01 | 西克帕控股有限公司 | 用於濕式平版印刷製程的環境友善油墨與潤版液以及濕式平版印刷製程 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3257941A (en) * | 1960-04-04 | 1966-06-28 | Anken Chemical And Film Corp | Method and means of making planographic printing plates |
US3908547A (en) * | 1968-02-22 | 1975-09-30 | Hoechst Ag | Hydrophilizing solution for electrophotographic images |
US4340509A (en) * | 1978-03-24 | 1982-07-20 | Michael A. Canale | Composition, concentrate and fountain solution for lithographic printing operations |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2250508A (en) * | 1936-06-15 | 1941-07-29 | John S Thompson | Treating zinc with organic acids |
US2219977A (en) * | 1936-09-16 | 1940-10-29 | Firm Mannesmann Stahlblechbau | Process for producing coatings on zinc and galvanized articles |
US2412200A (en) * | 1941-09-12 | 1946-12-10 | Jr Robert D Blum | Hectograph mass |
US2978361A (en) * | 1954-03-19 | 1961-04-04 | Degussa | Process for the surface treatment of metals |
US3284249A (en) * | 1963-06-28 | 1966-11-08 | Anaconda American Brass Co | Decorative finish for copper |
JPS53104301A (en) * | 1977-02-22 | 1978-09-11 | Ricoh Kk | Treating solution for lithographic printing |
EP0132594B1 (fr) * | 1983-07-25 | 1988-09-07 | Hitachi, Ltd. | Solution de cuivre pour le placage sans courant |
-
1985
- 1985-10-12 DE DE19853536485 patent/DE3536485A1/de not_active Withdrawn
-
1986
- 1986-09-29 EP EP86113359A patent/EP0219719B1/fr not_active Expired - Lifetime
- 1986-09-29 DE DE8686113359T patent/DE3668282D1/de not_active Expired - Fee Related
- 1986-10-08 JP JP61238184A patent/JPS6295292A/ja active Pending
- 1986-10-14 US US06/918,245 patent/US4798627A/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3257941A (en) * | 1960-04-04 | 1966-06-28 | Anken Chemical And Film Corp | Method and means of making planographic printing plates |
US3908547A (en) * | 1968-02-22 | 1975-09-30 | Hoechst Ag | Hydrophilizing solution for electrophotographic images |
US4340509A (en) * | 1978-03-24 | 1982-07-20 | Michael A. Canale | Composition, concentrate and fountain solution for lithographic printing operations |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998051512A1 (fr) * | 1997-05-13 | 1998-11-19 | Dc Druck Chemie Gmbh | Agent d'humidification pour l'impression offset |
CN108819452A (zh) * | 2018-05-15 | 2018-11-16 | 何治伟 | 一种印刷润版液 |
Also Published As
Publication number | Publication date |
---|---|
EP0219719B1 (fr) | 1990-01-17 |
DE3668282D1 (de) | 1990-02-22 |
US4798627A (en) | 1989-01-17 |
DE3536485A1 (de) | 1987-04-16 |
JPS6295292A (ja) | 1987-05-01 |
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