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US3877372A - Treatment of a printing plate with a dampening liquid - Google Patents

Treatment of a printing plate with a dampening liquid Download PDF

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US3877372A
US3877372A US42144273A US3877372A US 3877372 A US3877372 A US 3877372A US 42144273 A US42144273 A US 42144273A US 3877372 A US3877372 A US 3877372A
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printing
dampening
system
plate
glycol
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Kenneth W Leeds
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Kenneth W Leeds
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41NPRINTING 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 In this subclass the COPES System is used
    • B41N3/00Preparing for use and conserving printing surfaces
    • B41N3/08Damping; Neutralising or similar differentiation treatments for lithographic printing formes; Gumming or finishing solutions, fountain solutions, correction or deletion fluids, or on-press development

Abstract

A printing plate in lithographic offset or planographic printing is treated by application thereto of an aqueous dampening liquid containing ethylene glycol monobutyl ether, at least one of hexylene glycol and ethylene glycol, a silicone-glycol copolymer and a defoamer. Isopropyl alcohol, which is contained in conventional dampening liquids, may be completely eliminated.

Description

United States Patent 11 1 [111 3,877,372

Leeds 1 1 Apr. 15, 1975 [54] TREATMENT OF A PRINTING PLATE 3,398,002 8/ 1968 Bondurant et al. 106/2 WITH A DAMPENING LIQUID 3,625,715 12/1971 Nasca l06/2 [76] Inventor: Kenneth W. Leeds, 2719 Elm Dr.,

N rth Bell r NY, 11710 Primary Examiner-Theodore Morris [22] Filed: Dec. 3, 1973 [21] Appl. No.: 421,442 [57] ABSTRACT A printing plate in lithographic offset or planographic [52] 101/ sgg f 9 0 printing is treated by application thereto of an aque- 511 Int. Cl. C09k 3/18; c091 3/00; B4lm 3/08 gf t'r g 'gf 3 3 33333113,1 1 5113131 58 Field of Search 106/2 205 208- 101/451 y y e g y 101 ethylene glycol, 21 silicone-glycol copolymer and a defoamer. lsopropyl alcohol, which is contained in con- References Cited K212251181 dampening llqUldS, may be completely elimi- UNITED STATES PATENTS 3,354,824 1 l/l967 Griffith et al. 106/2 X 4 Claims, N0 Drawings TREATMENT OF A PRINTING PLATE WITH A DAMPENTNG LIQUID This invention relates to the application of dampening liquid to a printing plate in lithographic offset or planographic printing. More particularly, in the present invention a unique, advantageous dampening liquid is applied.

ln lithographic offset or planographic printing, the printing plate is chemically treated to provide a printing area and a nonprinting area, with the printing area, of course, being ink receptive and the nonprinting area being hydrophilic or water receptive. Pursuant to such treatment, a film of aqueous moistening or dampening liquid is applied to the surface of the plate, the liquid being retained by the hydrophilic area but repelled by the ink-receptive printing area, thus separating and isolating the nonprinting area from the ink which is applied to the printing area. As a result, only the image of the printing area is transferred to the blanket cylinder and onto the paper on which the image is printed.

To achieve successful printing by this method, it is necessary that the dampening liquid be applied to the surface of the printing plate in uniform and evenly distributed quantities and in regulated amounts to assure uniformly good quality reproduction of the printed image. To achieve such application of liquid, an arrangement of rollers is employed which transfers the dampening liquid onto the nonprinting areas of the cylinder.

For reasons which are well known in the lithographic art, the quantity of water which is applied is desirably kept at a minimum and only a sufficient amount is applied to form a minimum thickness of film on the nonprinting area to repel the ink and maintain that area ink free. Such regulation of the water or moistening liquid in correlation with the quantity of ink applied is commonly referred to as the ink-water balance, and proper control of this balance is essential to successful printing.

The reservoir of a dampening system, i.e., a mechanical system for the application of the dampening liquid or solution, is called a fountain. For that reason, the dampening solution is frequently called fountain solution". Fountain solutions usually contain in addition to water, a desensitizing gum such as gum arabic or Hydrogum (mesquite gum), an acid, usually phosphoric acid or an acid phosphate salt though sometimes gallic or tannic acid is used, ammonium bichromate and/or a nitrate salt such as ammonium nitrate, zinc nitrate or magnesium nitrate, and isopropyl alcohol. The constituents without the isopropyl alcohol may be referred to as fountain etch" or gum and etch."

lsopropyl alcohol vapors are hazardous. Moreover, in times of petrochemical shortages, isopropyl alcohol may be in very short supply. In the present invention, isopropyl alcohol is eliminated as a necessary constituent of fountain or dampening solutions. While one may maintain isopropyl alcohol in the dampening solutions of the invention, no advantage is to be gained from so doing.

In the present invention, the isopropyl alcohol is replaced with a chemical system constituted of ethylene glycol monobutyl ether, at least one of hexylene glycol and ethylene glycol, a silicone-glycol copolymer and a defoamer. The silicone-glycol copolymer is preferably a polyglycolpolydimethylsiloxane copolymer, particularly 473 Fluid" of the Chemical Products Division of Dow Corning Corporation, Midland, Mich., as described in its Bulletin 05-1853 of October, l967. The defoamer is preferably a silicone, particularly Antifoam l-l-lO Emulsion" silicone emulsion defoamer of the Chemical Products Division of Dow Corning Corporation, as described in its Bulletin 04-071 of August, 1965.

Ethylene glycol monobutyl ether was selected for use because of its miscibility with water and because it is an effective coupler. Hexylene glycol was selected because of its coupling properties and because it causes the mixture to level well, producing a thin film of the material on the printing plate. Ethylene glycol can be used instead of hexylene glycol, for its humectant prop erties, i.e., keeping the plate damp. Dow Corning 473 Fluid was selected because of its solubility in water. The defoamer is utilized to break the foam which results from the blending operation and to prevent the formation of foam in the reservoir and the recirculating system of the dampening system. In the absence of defoamer, a foaming problem is particularly noticed in Dahlgren and Dahlgrentype dampening systems.

It is convenient to constitute the dampening solution additives of the invention as a two part system, with all the active constituents but the defoamer being contained in one of the formulations. For ease of identification, a dye may be incorporated in one of the formulations. For example, the two part system may be constituted as follows:

An exemplary fountain solution containing the additives of the invention is constituted of percent water, 2.5 percent fountain etch, 1.5 percent of formula A and '1 percent of formula B, all by volume. A very typical conventional fountain etch contains 0.8 percent gum arabic, 0.1 percent phosphoric acid and 1.1 percent zinc nitrate. Two to four fluid ounces of formula A per gallon of fountain solution is typical.

While the defoamer prevents foam formation, the physicochemical action of the other active constituents of the fountain solution additive system of the invention, such as formula A, produce a thin, more uniform film of water across the dampening system and better wetting over the entire printing plate surface. Because of the thinner water film, pressmen can run with about 5 to 10 percent less water on the plate. By thus stabilizing ink-water balance, the additive system enables sharper printing, brighter colors and faster make-ready. The additive system also prevents stripping and the emulsification of ink. A few ounces of the additive system for each gallon of fountain'solution is all that is necessary for optimum results. The additive system eliminates the need for isopropyl alcohol.

Throughout the history of offset printing, the function of the dampening system, the distribution of water to the printing plate, has been a troublesome variable requiring frequent adjustment. The total additive system of the invention enables uniform, minimum water flow to the plate and its use costs less than the typical automated dampening system. In fact, the additive system of the invention makes any conventional dampening system perform like a sophisticated automated system.

Additive adjustments will depend on the water hardness, pH, temperature and other press variables and can be made on the basis of routine trial and error.

A typical successful run involving the fountain solution additives of the invention is as follows:

In an uninterrupted production run of 92,000 sheets in two colors, front and back, on a 38 X 48 inches Harris lithographic offset press equipped with a Harris Microflow dampening system, the customary fountain solution used was 5 fluid ounces of the aforementioned fountain etch, 1.5 gallons of isopropyl alcohol and 3.5 gallons of water. (Fountain solutions are customarily prepared in approximately 5 gallon batches.) For comparison an identical run was carried out using a fountain solution containing the additives according to the invention constituted of 16 fluid ounces of the fountain etch, 9.6 fluid ounces of formula A, 6.4 fluid ounces of formula B and sufficient water to make 5 gallons. The additive system of the invention resulted in excellent print quality without any foam or other production problems and the use of considerably less, up to onethird less, ink, with the elimination of isopropyl alcohol.

. While the invention has been described by reference to specific embodiments thereof, it is to be understood that such description is intended to illustrate rather than limit the invention, the scope of which is to be determined by reference to the appended claims.

What is claimed is:

1. In the treatment of a printing plate in lithographic offset or planographic printing to maintain an ink receptive printing area and a hydrophilic nonprinting area on the plate in which treatment a film of an aqueous dampening liquid is applied to the surface of the plate, the liquid comprising a desensitizing gum, water and at least one member of the group consisting of phosphoric acid, acid phosphate salts, gallic acid and tannic acid and being retained by the hydrophilic nonprinting area but repelled by the ink receptive printing area, thus separating and isolating the non-printing area from the ink which is applied to the printing area, the improvement in which the dampening liquid contains an additive system comprising ethylene glycol monobutyl ether, at least one of hexylene glycol and ethylene glycol, a silicone-glycol copolymer and a silicone emulsion defoamer, the proportion of the additive system in the dampening liquid being sufficient to produce a thin, more uniform film of water and better wetting over the entire plate surface thereby permifting printing with less water on the plate and to prevent stripping and emulsification of ink and to effect sharper printing with brighter colors.

2. In the treatment of claim 1, in the improvement in which the silicone-glycol copolymer comprises a polyglycol-polydimethylsiloxane copolymer.

3. In the treatment of claim 1, in the improvement in which the dampening liquid is isopropyl alcohol-free.

4. In the treatment of claim 2, in the improvement in which the dampening liquid is isopropyl alcohol-free.

Claims (4)

1. IN THE TREATMENT OF A PRINTING PLATE IN LITHOGRAPHIC OFFSET OR PLANOGRAPHIC PRINTING TO MAINTAIN AN INK RECEPTIVE PRINTING AREA AND A HYDROPHILIC NONPRINTING AREA ON THE PLATE IN WHICH TREATMENT A FILM OF AN AQUEOUS DAMPENING LIQUID IS APPLIED TO THE SURFACE OF THE PLATE, THE LIQUID COMPRISING A DESENSITIZING GUM, WATER AND AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF PHOSPHORIC ACID, ACID PHOSPHATE SALTS, GALLIC ACID AND TANNIC ACID AND BEING RETAINED BY THE HYDROPHILIC NONPRINTING AREA BUT REPELLED BY THE INK RECEPTIVE PRINTING AREA, THUS SEPARATING AND ISOLATING THE NON-PRINTING AREA FROM THE INK WHICH IS APPLIED TO THE PRINTING AREA, THE IMPROVEMENT IN WHICH THE DAMPENING LIQUID CONTAINS AN ADDITIVE SYSTEM COMPRISING ETHYLENE GLYCOL MONOBUTYL ETHER, AT LEAST ONE OF HEXYLENE GLYCOL AND ETHYLENE GLYCOL, A SILICONE-GLYCOL COPOLYMER AND A SILICONE EMULSION DEFOAMER, THE PROPORTION OF THE ADDITIVE SYSTEM IN THE DAMPENING LIQUID BEING SUFFICIENT TO PRODUCE A THIN, MORE UNIFORM FILM OF WATER AND BETTER WETTING OVER THE ENTIRE PLATE SURFACE THEREBY PERMITTING PRINTING WITH LESS WATER ON THE PLATE AND TO PREVENT STRIPPING AND EMULSIFICATION OF INK AND TO EFFECT SHARPER PRINTING WITH BRIGHTER COLORS.
2. In the treatment of claim 1, in the improvement in which the silicone-glycol copolymer comprises a polyglycol-polydimethylsiloxane copolymer.
3. In the treatment of claim 1, in the improvement in which the dampening liquid is isopropyl alcohol-free.
4. In the treatment of claim 2, in the improvement in which the dampening liquid is isopropyl alcohol-free.
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Cited By (67)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4247328A (en) * 1978-01-18 1981-01-27 Vickers Limited Lithographic fountain concentrates containing a desensitizing material in an organic solvent liquid
US4278467A (en) * 1978-09-11 1981-07-14 Graphic Arts Technical Foundation Substitutive additives for isopropyl alcohol in fountain solution for lithographic offset printing
EP0066176A1 (en) * 1981-05-18 1982-12-08 Union Carbide Corporation Fountain solutions suitable for use in lithographic offset printing
US4560410A (en) * 1981-05-18 1985-12-24 Union Carbide Corporation Fountain solutions suitable for use in lithographic offset printing
US4589920A (en) * 1982-10-08 1986-05-20 Mitsubishi Paper Mills, Ltd. Ink composition utilized in lithographic printing and a lithographic printing process
EP0249751A2 (en) * 1986-06-16 1987-12-23 Hoechst Celanese Corporation Feuchtmittel mit einem darin enthaltenen Polyolgemisch
US4854969A (en) * 1986-07-02 1989-08-08 Sun Chemical Corporation Lithographic fountain solutions
US4886553A (en) * 1987-06-01 1989-12-12 Hoechst Celanese Corporation Cleaner for lithographic printing plates
US4903599A (en) * 1981-10-10 1990-02-27 Basf Farben & Fasern Akg. Printed products and a process for their manufacture
EP0391159A2 (en) * 1989-04-03 1990-10-10 Aqualon Company Water soluble polymers as alcohol replacement in lithographic fountain solutions
US4997588A (en) * 1989-02-14 1991-03-05 Hoechst Celanese Corporation Cleaner for lithographic printing plates free of aromatic hydrocarbons
US5106414A (en) * 1988-04-07 1992-04-21 Fuji Photo Film Co., Ltd. Dampening water composition for lithographic printing and additive for dampening water
DE4113474A1 (en) * 1991-04-25 1992-10-29 Heidelberger Druckmasch Ag Fountain solution for use in offset printing process
US5163999A (en) * 1989-05-09 1992-11-17 Fuji Photo Film Co., Ltd. Dampening solution composition for lithographic printing
US5164000A (en) * 1991-06-27 1992-11-17 Gamblin Rodger L Lithographic printing fountain solution
US5228906A (en) * 1992-05-01 1993-07-20 Fidler Kenneth L Moistening agent for offset printing plates
DE4401619A1 (en) * 1993-01-26 1994-07-28 Mitsubishi Paper Mills Ltd Aq. damping soln. free from isopropanol and use in printing
US5338344A (en) * 1992-03-05 1994-08-16 Bondurant Louis E Decreasing alcohol content of fountain solutions for planographic printing
US5387279A (en) * 1993-04-12 1995-02-07 Varn Products Company, Inc. Lithographic dampening solution
US5443629A (en) * 1991-11-27 1995-08-22 Alex Wilson Coldstream, Ltd. Latent image ink
US5694848A (en) * 1996-03-13 1997-12-09 Heidelberger Druckmaschinen Ag Printing unit for water based inks
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
US5725646A (en) * 1996-03-13 1998-03-10 Sun Chemical Corporation Water-based offset lithographic printing ink
US5758580A (en) * 1996-03-13 1998-06-02 Heidelberger Druckmaschinen Ag Printing unit using various ink types
US5778789A (en) * 1996-03-13 1998-07-14 Sun Chemical Offset lithographic printing process with a water based ink
US5972088A (en) * 1996-03-13 1999-10-26 Sun Chemical Corporation Water-based gravure printing ink
US6209456B1 (en) 1996-03-13 2001-04-03 Heidelberger Druckmaschinen Ag Web- and sheet-fed printing unit using various ink types, particularly water-based inks
US6245421B1 (en) 1999-02-04 2001-06-12 Kodak Polychrome Graphics Llc Printable media for lithographic printing having a porous, hydrophilic layer and a method for the production thereof
US6276273B1 (en) 1999-06-11 2001-08-21 Kodak Polychrome Graphics Llc Surfactant-pretreated printing plate substrate, lithographic printing plate and method for production thereof
US6427597B1 (en) 2000-01-27 2002-08-06 Patrice M. Aurenty Method of controlling image resolution on a substrate
US6444022B1 (en) 2000-05-20 2002-09-03 Sun Chemical Corporation Water based offset lithographic printing ink
US6451413B1 (en) 1999-02-04 2002-09-17 Kodak Polychrome Graphics Llc Method of preparing a printing plate and printing plate
US6471349B1 (en) 2000-01-27 2002-10-29 Kodak Polychrome Graphics Llc Method to prepare a printing plate and printing plate
US6532871B1 (en) 2000-01-27 2003-03-18 Kodak Polychrome Graphics Llc Method of controlling image resolution on a substrate using an autophobic fluid
US6593068B1 (en) 1999-11-10 2003-07-15 Fuji Photo Film Co., Ltd. Concentrated dampening water composition for lithographic printing
US6709503B1 (en) 2002-12-19 2004-03-23 Sun Chemical Corporation Waterbased heatset offset ink compositions
US6828013B2 (en) * 2000-12-11 2004-12-07 Exxonmobil Oil Corporation Porous biaxially oriented high density polyethylene film with hydrophilic properties
EP1688266A1 (en) 2005-02-03 2006-08-09 Fuji Photo Film B.V. Method and solvent mix to improve the dampening of lithographic printing plates
US20060211790A1 (en) * 2001-11-09 2006-09-21 Dimotakis Emmanuel D Low tack water washable lithographic printing inks
US20070289488A1 (en) * 2006-06-15 2007-12-20 Mcintosh Sidney Water washable lithographic printing ink
EP1990312A2 (en) 2005-10-03 2008-11-12 Sun Chemical Corporation Security pigments and the process of making thereof
WO2010066886A1 (en) * 2008-12-11 2010-06-17 Weros Technology Gmbh Printing method, in particular offset-printing method, and separating means therefor
WO2012055870A1 (en) 2010-10-28 2012-05-03 Basf Se Fountain solution and fountain solution concentrates
US8347787B1 (en) 2011-08-05 2013-01-08 Palo Alto Research Center Incorporated Variable data lithography apparatus employing a thermal printhead subsystem
US8586277B1 (en) 2012-07-12 2013-11-19 Palo Alto Research Center Incorporated Patterning of an image definition material by electro-wetting
US20140093284A1 (en) * 2012-09-29 2014-04-03 Xerox Corporation Systems and methods for ink-based digital printing using liquid immersion development
US8833254B2 (en) 2012-07-12 2014-09-16 Xerox Corporation Imaging system with electrophotographic patterning of an image definition material and methods therefor
US8919252B2 (en) 2012-08-31 2014-12-30 Xerox Corporation Methods and systems for ink-based digital printing with multi-component, multi-functional fountain solution
US8950322B2 (en) 2012-03-21 2015-02-10 Xerox Corporation Evaporative systems and methods for dampening fluid control in a digital lithographic system
US20150040939A1 (en) * 2011-04-27 2015-02-12 Xerox Corporation Tunable surfactants in dampening fluids for digital offset ink printing applications
US8991310B2 (en) 2011-04-27 2015-03-31 Palo Alto Research Center Incorporated System for direct application of dampening fluid for a variable data lithographic apparatus
US9021948B2 (en) 2011-04-27 2015-05-05 Xerox Corporation Environmental control subsystem for a variable data lithographic apparatus
US9021949B2 (en) 2012-02-06 2015-05-05 Palo Alto Research Center Incorporated Dampening fluid recovery in a variable data lithography system
US9032874B2 (en) 2012-03-21 2015-05-19 Xerox Corporation Dampening fluid deposition by condensation in a digital lithographic system
US9126452B2 (en) 2013-07-29 2015-09-08 Xerox Corporation Ultra-fine textured digital lithographic imaging plate and method of manufacture
US9250516B2 (en) 2013-07-29 2016-02-02 Palo Alto Research Center Incorporated Method of making a molded textured imaging blanket surface
US9272532B2 (en) 2013-07-29 2016-03-01 Palo Alto Research Center Incorporated Molded textured imaging blanket surface
US9316993B2 (en) 2012-07-12 2016-04-19 Xerox Corporation Electrophotographic patterning of an image definition material
US9316994B2 (en) 2012-07-12 2016-04-19 Xerox Corporation Imaging system with electrophotographic patterning of an image definition material and methods therefor
US9327487B2 (en) 2012-08-31 2016-05-03 Xerox Corporation Variable lithographic printing process
US9529307B2 (en) 2012-07-12 2016-12-27 Palo Alto Research Center Incorporated Imaging system for patterning of an image definition material by electro-wetting and methods therefor
US9561677B2 (en) 2012-08-31 2017-02-07 Xerox Corporation Imaging member for offset printing applications
US9567486B2 (en) 2012-08-31 2017-02-14 Xerox Corporation Imaging member for offset printing applications
US9592698B2 (en) 2012-08-31 2017-03-14 Xerox Corporation Imaging member for offset printing applications
US9616654B2 (en) 2012-08-31 2017-04-11 Xerox Corporation Imaging member for offset printing applications
US9639050B2 (en) 2012-07-12 2017-05-02 Xerox Corporation Electrophotographic patterning of an image definition material
US9643397B2 (en) 2010-10-29 2017-05-09 Palo Alto Research Center Incorporated Variable data lithography system for applying multi-component images and systems therefor

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Cited By (79)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4247328A (en) * 1978-01-18 1981-01-27 Vickers Limited Lithographic fountain concentrates containing a desensitizing material in an organic solvent liquid
US4278467A (en) * 1978-09-11 1981-07-14 Graphic Arts Technical Foundation Substitutive additives for isopropyl alcohol in fountain solution for lithographic offset printing
EP0066176A1 (en) * 1981-05-18 1982-12-08 Union Carbide Corporation Fountain solutions suitable for use in lithographic offset printing
US4560410A (en) * 1981-05-18 1985-12-24 Union Carbide Corporation Fountain solutions suitable for use in lithographic offset printing
US4903599A (en) * 1981-10-10 1990-02-27 Basf Farben & Fasern Akg. Printed products and a process for their manufacture
US4589920A (en) * 1982-10-08 1986-05-20 Mitsubishi Paper Mills, Ltd. Ink composition utilized in lithographic printing and a lithographic printing process
EP0249751A2 (en) * 1986-06-16 1987-12-23 Hoechst Celanese Corporation Feuchtmittel mit einem darin enthaltenen Polyolgemisch
EP0249751A3 (en) * 1986-06-16 1988-03-23 Hoechst Celanese Corporation Feuchtmittel mit einem darin enthaltenen polyolgemisch
US4854969A (en) * 1986-07-02 1989-08-08 Sun Chemical Corporation Lithographic fountain solutions
US4886553A (en) * 1987-06-01 1989-12-12 Hoechst Celanese Corporation Cleaner for lithographic printing plates
US5106414A (en) * 1988-04-07 1992-04-21 Fuji Photo Film Co., Ltd. Dampening water composition for lithographic printing and additive for dampening water
US4997588A (en) * 1989-02-14 1991-03-05 Hoechst Celanese Corporation Cleaner for lithographic printing plates free of aromatic hydrocarbons
EP0391159A2 (en) * 1989-04-03 1990-10-10 Aqualon Company Water soluble polymers as alcohol replacement in lithographic fountain solutions
US5006168A (en) * 1989-04-03 1991-04-09 Aqualon Company Water soluble polymers as alcohol replacement in lithographic fountain solutions
EP0391159A3 (en) * 1989-04-03 1991-11-13 Aqualon Company Water soluble polymers as alcohol replacement in lithographic fountain solutions
US5163999A (en) * 1989-05-09 1992-11-17 Fuji Photo Film Co., Ltd. Dampening solution composition for lithographic printing
DE4113474A1 (en) * 1991-04-25 1992-10-29 Heidelberger Druckmasch Ag Fountain solution for use in offset printing process
WO1992019455A1 (en) * 1991-04-25 1992-11-12 Heidelberger Druckmaschinen Ag Moistening agent for use in the offset printing process
WO1993000411A1 (en) * 1991-06-27 1993-01-07 Gamblin Rodger L Lithographic printing fountain solution
US5164000A (en) * 1991-06-27 1992-11-17 Gamblin Rodger L Lithographic printing fountain solution
US5443629A (en) * 1991-11-27 1995-08-22 Alex Wilson Coldstream, Ltd. Latent image ink
US5338344A (en) * 1992-03-05 1994-08-16 Bondurant Louis E Decreasing alcohol content of fountain solutions for planographic printing
US5228906A (en) * 1992-05-01 1993-07-20 Fidler Kenneth L Moistening agent for offset printing plates
DE4401619A1 (en) * 1993-01-26 1994-07-28 Mitsubishi Paper Mills Ltd Aq. damping soln. free from isopropanol and use in printing
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
US5387279A (en) * 1993-04-12 1995-02-07 Varn Products Company, Inc. Lithographic dampening solution
US5694848A (en) * 1996-03-13 1997-12-09 Heidelberger Druckmaschinen Ag Printing unit for water based inks
US5725646A (en) * 1996-03-13 1998-03-10 Sun Chemical Corporation Water-based offset lithographic printing ink
US5758580A (en) * 1996-03-13 1998-06-02 Heidelberger Druckmaschinen Ag Printing unit using various ink types
US5778789A (en) * 1996-03-13 1998-07-14 Sun Chemical Offset lithographic printing process with a water based ink
US5972088A (en) * 1996-03-13 1999-10-26 Sun Chemical Corporation Water-based gravure printing ink
US6209456B1 (en) 1996-03-13 2001-04-03 Heidelberger Druckmaschinen Ag Web- and sheet-fed printing unit using various ink types, particularly water-based inks
US6451413B1 (en) 1999-02-04 2002-09-17 Kodak Polychrome Graphics Llc Method of preparing a printing plate and printing plate
US6555205B2 (en) 1999-02-04 2003-04-29 Kodak Polychrome Graphics Llc Printing plate and method to prepare a printing plate
US6245421B1 (en) 1999-02-04 2001-06-12 Kodak Polychrome Graphics Llc Printable media for lithographic printing having a porous, hydrophilic layer and a method for the production thereof
US6455132B1 (en) 1999-02-04 2002-09-24 Kodak Polychrome Graphics Llc Lithographic printing printable media and process for the production thereof
US6472054B1 (en) 1999-02-04 2002-10-29 Kodak Polychrome Graphics Llc Method of preparing a printing plate and printing plate
US6276273B1 (en) 1999-06-11 2001-08-21 Kodak Polychrome Graphics Llc Surfactant-pretreated printing plate substrate, lithographic printing plate and method for production thereof
US6593068B1 (en) 1999-11-10 2003-07-15 Fuji Photo Film Co., Ltd. Concentrated dampening water composition for lithographic printing
US6471349B1 (en) 2000-01-27 2002-10-29 Kodak Polychrome Graphics Llc Method to prepare a printing plate and printing plate
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