EP0066176B1 - Feuchtwasser für lithographische Offsetdruckverfahren - Google Patents

Feuchtwasser für lithographische Offsetdruckverfahren Download PDF

Info

Publication number
EP0066176B1
EP0066176B1 EP82104326A EP82104326A EP0066176B1 EP 0066176 B1 EP0066176 B1 EP 0066176B1 EP 82104326 A EP82104326 A EP 82104326A EP 82104326 A EP82104326 A EP 82104326A EP 0066176 B1 EP0066176 B1 EP 0066176B1
Authority
EP
European Patent Office
Prior art keywords
glycol
water
ounce
fountain solution
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.)
Expired
Application number
EP82104326A
Other languages
English (en)
French (fr)
Other versions
EP0066176A1 (de
Inventor
Richard Jude Burns
Friso George Willeboordse
Martin Frank Cohen
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.)
Union Carbide Corp
Original Assignee
Union Carbide Corp
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 Union Carbide Corp filed Critical Union Carbide Corp
Priority to AT82104326T priority Critical patent/ATE11117T1/de
Publication of EP0066176A1 publication Critical patent/EP0066176A1/de
Application granted granted Critical
Publication of EP0066176B1 publication Critical patent/EP0066176B1/de
Expired legal-status Critical Current

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

  • This invention is directed to an improved fountain solution suitable for use in a lithographic offset printing press, which solution contains a mixture of a polyol and/or glycol ether partially soluble in water and a polyol and/or glycol ether completely soluble in water.
  • Lithographic printing operations require the use of a dampening or fountain solution to achieve proper operation of the press so that good quality prints are obtained.
  • the fountain solution is generally a blend or mixture of water, acids, salts, solvents, and naturally occurring polymeric materials, such as gum arabic, and/or a variety of synthetic polymers.
  • the purpose of the fountain solution is to wet the non-image areas of a printing plate and thus prevent ink from depositing in these non-image areas. Should the ink deposit in the non-image area, a poor quality print results.
  • alcohols, especially isopropanol were used in fountain solutions up to 30 percent volume concentration levels to achieve best performance in operation of the press with attendant high quality prints.
  • the basis for using isopropyl alcohol resides partly in its ability to transport the fountain solution to the printing plate by means of the inked rollers in the press or through its own roller train.
  • U.S. Patent 3,877,372 describes an attempt to eliminate isopropanol from the fountain solution and use a mixture of butyl cellosolve, a silicone glycol copolymer, and a defoamer.
  • a commerically available fountain solution utilizes 2-ethyl-1,3-hexanediol as a replacement for isopropyl alcohol to provide an isopropyl alcohol free fountain solution.
  • the use of 2-ethyl-1,3-hexanediol eliminates the toxic and flammable properties associated with isopropyl alcohol containing fountain solutions.
  • fountain solutions containing the 2-ethyl-1,3-hexanediol provide a high quality printed product on a lithographic press.
  • Tinting is the deposition of minute ink droplets in the non-image area of the print resulting in the appearance of a light tint.
  • Banding is the appearance of narrow dark streaks in the print.
  • the fountain solution contains between about 0.5 and about 10 percent by volume of the mixture.
  • the mixture of polyols and/or glycol ethers which is suitable for use in this invention includes a polyol and/or glycol ether which is partially soluble in water, such as 2-ethyl-1 ,3-hexanediol, Esterdiol-204, i.e., Hexyl Cellosolve, i.e., Hexyl Carbitol, i.e., and the like, and a polyol and/or glycol ether which is completely soluble in water, such as propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, hexylene glycol, triethylene glycol, tetraethylene glycol, tripropylene glycol and 1,5-pentanediol.
  • a polyol and/or glycol ether which is partially soluble in water such as 2-ethyl-1 ,3-hexanediol, Esterdiol-204, i.e
  • the fountain solutions are preferably used as aqueous acidic solutions.
  • Phosphoric acid is a preferred acid for use in acidifying the formulation.
  • Other acids which can be used include inorganic as well as organic acids, such as acetic acid, nitric acid, hydrochloric acid, and the like.
  • a buffering agent, such as ammonium acetate can also be included.
  • the fountain solution is generally maintained at a pH of from about 2 to about 5.
  • the particular pH at which a given solution will be maintained will depend upon factors, such as the type of water-soluble polymer used, other ingredients in the solution as well as the type of substrate employed in the lithographic printing plate, and the like.
  • additives which may be used in the fountain solution include preservatives such as phenol, sodium salicylate, and the like; corrosion inhibitors such as ammonium bichromate, magnesium nitrate, zinc nitrate, and the like; hardeners such as chromium alum, and the like; organic solvents such as cyclic ethers, e.g., 4-butyrolactone, and the like; low molecular weight aldehydes, such as formaldehyde, glutaraldehyde, and the like. These additives are generally used in amounts of from about 0.1 to about 10 percent by volume.
  • the fountain solution was used on a 63.5 cm (25 inch) production size press with Dahlgren recirculating dampening system.
  • the press was run with the damper set at speeds of 40, 50 and 60 running approximately 200 sheets of paper at each setting.
  • the optical density of sheets was measured at each setting. These optical density measurements were made with an Optical Densitometer.
  • a scum cycle test was performed. In this test the fountain solution feed was momentarily stopped to allow the plate to become completely coated with ink. Then the fountain solution feed was started and the number of revolutions of the plate before it was cleaned of excess ink was recorded. Further, visual observations were made of the print to determine the appearance of tinting and banding.
  • the formulation yielded a 1 volume percent concentration of 2-ethyl-1,3-hexanediol and a 5 volume percent concentration of propylene glycol.
  • fountain solutions were prepared using 2-ethyl-1,3-hexanediol and propylene glycol where the concentration of propylene glycol was varied.
  • the formulation yielded a 2 volume percent concentration of propylene glycol.
  • Example 5 was exactly repeated except that 147.4 g (5.2 ounces) of propylene glycol were used. The formulation yielded a 4 volume percent concentration of the glycol.
  • Example 5 was exactly repeated except that 221.1 g (7.8 ounces) of propylene glycol were used. The formulation yielded a 6 volume percent concentration of the glycol.
  • Example 5 was exactly repeated except that 294.8 (10.4 ounces) of propylene glycol were used. The formulation yielded an 8 volume percent concentration of the glycol.
  • Example 5 was exactly repeated except that 368.5 g (13.0 ounces) of propylene glycol were used. The formulation yielded a 10 volume percent concentration of the glycol.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Printing Methods (AREA)
  • Paper (AREA)

Claims (3)

1. Verbesserte Befeuchtungslösung, die zur Verwendung in einer Flachdruck-Offsetdruckpresse geeignet ist, welche Lösung zwischen 0,5 und etwa 10 Volumenprozent eines Gemisches aus einem in Wasser teilweise löslichen Polyol und/oder Glykolether und einem in Wasser vollständig löslichen Polyol und/oder Glykolether enthält.
2. Befeuchtungslösung, wie in Anspruch 1 definiert, worin das Glykol, das in Wasser teilweise löslich ist, 2-Ethyl-1,3-hexandiol enthält.
3. Befeuchtungslösung, wie in den Ansprüchen 1 oder 2 definiert, worin das Glykol, das in Wasser vollständig löslich ist, ausgewählt ist unter einem oder mehreren von Propylenglykol, Ethylenglykol, Dipropylenglykol, Diethylenglykol, Hexylenglykol, Triethylenglykol, Tetraethylenglykol, Tripropylenglykol und 1,5-Pentandiol.
EP82104326A 1981-05-18 1982-05-17 Feuchtwasser für lithographische Offsetdruckverfahren Expired EP0066176B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82104326T ATE11117T1 (de) 1981-05-18 1982-05-17 Feuchtwasser fuer lithographische offsetdruckverfahren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US26407681A 1981-05-18 1981-05-18
US264076 1981-05-18

Publications (2)

Publication Number Publication Date
EP0066176A1 EP0066176A1 (de) 1982-12-08
EP0066176B1 true EP0066176B1 (de) 1985-01-09

Family

ID=23004465

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82104326A Expired EP0066176B1 (de) 1981-05-18 1982-05-17 Feuchtwasser für lithographische Offsetdruckverfahren

Country Status (6)

Country Link
EP (1) EP0066176B1 (de)
JP (1) JPS57199693A (de)
AT (1) ATE11117T1 (de)
CA (1) CA1174011A (de)
DE (1) DE3261826D1 (de)
MX (1) MX156658A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4113474A1 (de) * 1991-04-25 1992-10-29 Heidelberger Druckmasch Ag Feuchtmittel zur verwendung im offset-druckverfahren

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1228204A (en) * 1982-03-29 1987-10-20 Richard J. Burns Fountain solution
EP0249751A3 (de) * 1986-06-16 1988-03-23 Hoechst Celanese Corporation Feuchtmittel mit einem darin enthaltenen Polyolgemisch
JP2673586B2 (ja) * 1989-08-02 1997-11-05 富士写真フイルム株式会社 平版印刷版用湿し水組成物，それに使用する濃縮液及びそれを使用する平版印刷方法
JPH0785947B2 (ja) * 1989-08-05 1995-09-20 東洋インキ製造株式会社 平版印刷用湿し水
US5714302A (en) * 1993-01-26 1998-02-03 Mitsubishi Paper Mills Limited Method of printing with using lithographic printing plate made by silver complex diffusion transfer process and using dampening composition containing nonionic surface active agent
JP2001138656A (ja) * 1999-11-10 2001-05-22 Fuji Photo Film Co Ltd 平版印刷用濃縮湿し水組成物
US6488754B2 (en) 2000-11-29 2002-12-03 Grain Processing Corporation Lithographic dampening solution and method for dampening a lithographic plate
JP2003170673A (ja) 2001-09-28 2003-06-17 Fuji Photo Film Co Ltd 平版印刷版用湿し水組成物及び平版印刷方法
EP1688266A1 (de) 2005-02-03 2006-08-09 Fuji Photo Film B.V. Verfahren und Lösungsmittelgemisch um Feuchtwasser für lithographische Druckplatten zu verbessern

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5129441B2 (de) * 1971-10-08 1976-08-25
DE2337125A1 (de) * 1973-07-20 1975-01-30 Kodak Ag Feuchtwasserkonzentrat fuer den offsetdruck
US3877372A (en) * 1973-12-03 1975-04-15 Kenneth W Leeds Treatment of a printing plate with a dampening liquid
JPS5129441A (en) * 1974-08-23 1976-03-12 Nippon Synthetic Chem Ind Guriokishirusanno seizohoho
JPS54138703A (en) * 1978-04-19 1979-10-27 Dainippon Printing Co Ltd Moistening composite substance for flat printing plate
US4278467A (en) * 1978-09-11 1981-07-14 Graphic Arts Technical Foundation Substitutive additives for isopropyl alcohol in fountain solution for lithographic offset printing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4113474A1 (de) * 1991-04-25 1992-10-29 Heidelberger Druckmasch Ag Feuchtmittel zur verwendung im offset-druckverfahren

Also Published As

Publication number Publication date
CA1174011A (en) 1984-09-11
JPH0446760B2 (de) 1992-07-30
JPS57199693A (en) 1982-12-07
ATE11117T1 (de) 1985-01-15
EP0066176A1 (de) 1982-12-08
DE3261826D1 (en) 1985-02-21
MX156658A (es) 1988-09-22

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