US3223524A - Process for the production of planographic printing plates having an aluminum support - Google Patents

Process for the production of planographic printing plates having an aluminum support Download PDF

Info

Publication number
US3223524A
US3223524A US58181A US5818160A US3223524A US 3223524 A US3223524 A US 3223524A US 58181 A US58181 A US 58181A US 5818160 A US5818160 A US 5818160A US 3223524 A US3223524 A US 3223524A
Authority
US
United States
Prior art keywords
silver
silver halide
solution
dispersion
planographic printing
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 - Lifetime
Application number
US58181A
Other languages
English (en)
Inventor
Konig Anita Von
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.)
Agfa Gevaert NV
Original Assignee
Agfa AG
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
Priority to NL256257D priority Critical patent/NL256257A/xx
Priority to DEA32938A priority patent/DE1217784B/de
Priority to FR839501A priority patent/FR1270868A/fr
Priority to CH1084560A priority patent/CH390058A/de
Priority to US58181A priority patent/US3223524A/en
Application filed by Agfa AG filed Critical Agfa AG
Priority to GB33022/60A priority patent/GB942822A/en
Priority to GB17813/63A priority patent/GB942823A/en
Priority to DEA37064A priority patent/DE1227341B/de
Application granted granted Critical
Publication of US3223524A publication Critical patent/US3223524A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D285/00—Heterocyclic compounds containing rings having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by groups C07D275/00 - C07D283/00
    • C07D285/01—Five-membered rings
    • C07D285/02—Thiadiazoles; Hydrogenated thiadiazoles
    • C07D285/04—Thiadiazoles; Hydrogenated thiadiazoles not condensed with other rings
    • C07D285/12—1,3,4-Thiadiazoles; Hydrogenated 1,3,4-thiadiazoles
    • C07D285/125—1,3,4-Thiadiazoles; Hydrogenated 1,3,4-thiadiazoles with oxygen, sulfur or nitrogen atoms, directly attached to ring carbon atoms, the nitrogen atoms not forming part of a nitro radical
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D285/00—Heterocyclic compounds containing rings having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by groups C07D275/00 - C07D283/00
    • C07D285/01—Five-membered rings
    • C07D285/02—Thiadiazoles; Hydrogenated thiadiazoles
    • C07D285/04—Thiadiazoles; Hydrogenated thiadiazoles not condensed with other rings
    • C07D285/12—1,3,4-Thiadiazoles; Hydrogenated 1,3,4-thiadiazoles
    • C07D285/125—1,3,4-Thiadiazoles; Hydrogenated 1,3,4-thiadiazoles with oxygen, sulfur or nitrogen atoms, directly attached to ring carbon atoms, the nitrogen atoms not forming part of a nitro radical
    • C07D285/135—Nitrogen atoms
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/004—Photosensitive materials
    • G03F7/06—Silver salts
    • G03F7/063—Additives or means to improve the lithographic properties; Processing solutions characterised by such additives; Treatment after development or transfer, e.g. finishing, washing; Correction or deletion fluids
    • G03F7/066—Organic derivatives of bivalent sulfur, e.g. onium derivatives

Definitions

  • the invention relates to a method for improving planographic printing plates having an aluminium support.
  • photographically produced silver images can be transformed into heavy metal and/or silver salt images by oxidation.
  • the resulting images can be reacted with an organic compound containing an SH-, SeH- or NH-group to produce sparingly soluble salt like compounds which take up greasy printing inks.
  • photographic silver images can be deposited by the silver salt diffusion process on to unprepared aluminium plates having a rough surface and which are suitable for planographic printing.
  • the silver images can be made water-repellent by treating them with an organic compound which is capable of being adsorbed by metallic silver so as to render the images capable of taking up greasy printing inks. In this way planographic printing plates are obtained.
  • Suitable organic compounds which are capable of being adsorbed by metallic silver described in the copending application Serial No. 730,259, now US.
  • Patent 3,083,097 are 2,5-dimercapto-1,3,4-thiodiazole, S-mercapto-B-phenyl- 1,3,4-thiodiazo1ethione-2,5 mercaptotetrazole, l-p'henyl- S-mercaptotetrazole, 3-mercapto-1,2,4-triazole, l-phenyl- 3-mercapto-l,2,4-triazole, 2,4,6-trimercapto-1,3,5-triazine, 2-mercapto-4,5-dimethyl-fi-oxypyrimidine, 6 mercaptopurine, tetraethyl thiuram disulphide, thiourea, phenyl thiourea, phenyl thiosemicarbazide, diphenyl thiosernicarbazide, diphenyl thiocarbazone, diphenyl carbazide and compounds of the general formula wherein R represents an alkyl
  • the organic compounds employed for the purpose of making the silver images water-repellent are soluble or are capable of being suspended in the fixing solutions normally employed in planographic printing.
  • Especialy suitable are aqueous solutions'ofgum arabic, polyvinyl alcohol and carboxymethyl cellulose, which are adjusted to a pH of from 4 to 6 by means of phosphoric acid or a phosphate. This adjustment of the pH is effected in the absence of an organic solvent, since organic solvents dissolve the printing inks.
  • N'-Ifi1 NN HS-(l) wherein Z stands for (I) alkylene with 1 to 6 carbon wherein n is an integer, preferably from 1 to 5, and m is an integer from 2 to 4, or (III) NH.B.NH', wherein B stands for alkylene with 4 to 10 carbon atoms, cycloalkylene or arylene.
  • the product is In Order to P F stablesuspenswns of the precipitated by stirring the reaction mixture into aqueous Pounds 111 the acid fiXlng sollltlons, the Compounds must hydrogen chloride which is cooled with ice.
  • the precipibe emulsified by means of emulsifiers, preferably anionictated product is suction-filtered and washed free from 55 active emulsifiers. Suitable emulsifiers and emulsifyhalogen.
  • the raw material is purified by reprecipitation. ing auxiliaries are given in Table 4.
  • Examlple 1 50 g. of the aforementioned compound V are suspended in 100 cc. of Emulgator (i.e. Table 4 #4), preferably in a mixing apparatus, for example in a cutting mill, vibrating mill, high-pressure homogenizer, a turbulence chamber equipped with a high speed stirrer or a roll stand having three rollers.
  • the homogeneous suspension is dispersed in 4900 cc. of a 10% aqueous polyvinyl alcohol solution and the dispersion is adjusted to a pH of 4.4 by means of 10% phosphoric acid.
  • a silver image produced on an aluminum offset plate by the silver salt diffusion process is rubbed with the above dispersion. The excess dispersion is wiped off with a moist sponge, whereupon the plate is used for printing.
  • Example 2 75 g. of the aforementioned compound IV (see Table 2) are suspended in 150 cc. of a 50% aqueous solution of Monopolbrillantol (i.e. Table 4, #1) in a mixing apparatus. The homogeneous mixture is dispersed in 4850 cc. of a 7% aqueous carboxymethyl cellulose solution. The dispersion is adjusted to a pH of 5.2 by means of 10% phosphoric acid. The dispersion is employed as in Example 1.
  • Example 3 100 g. of the aforementioned compound X (see Table 2) are mixed with 20 cc. of Teepol (20%, normal commercial type), 200 cc. of polyglycol P 400 and 100 g. of aqueous gum arabic solution (1:1) in a ball mill for 3 hours. The homogeneous mixture is dispersed in 4800 cc. of a 2.0% aqueous carboxymethyl cellulose solution and the dispersion is adjusted to a pH of 4.6 by means of 10% phosphoric acid. The dispersion is employed as in Example 1.
  • Example 4 .50 g. of the aforementioned compound VII (see Table 2) are mixed with 7.5 cc. of Teepol, 50 cc. of Polyglycol P 400 and 50 cc. of a 10% aqueous solution of Luviskol K 90 (polyvinyl pyrrolidone, molecular weight about 700,000, manufactured by BSAF) in a mixing apparatus and dispersed in 4900 cc. of a 2.5% aqueous carboxymethyl cellulose solution. The dispersion is adjusted to a pH value of 4.1 With 10% phosphoric acid. The dispersion is employed as in Example 1.
  • Luviskol K 90 polyvinyl pyrrolidone, molecular weight about 700,000, manufactured by BSAF
  • Example 5 A silver image produced on an aluminium offset plate by the silver salt diffusion process is treated with a solution of 5 g. of the aforementioned compound VI (see Table 2) dissolved in 100 cc. of 1.8% caustic potash solution. After the plate has been made water-repellent in this way, it rubbed with a 25% aqueous gum arabic solution which is adjusted to a pH value of 4.0 with phosphoric acid. The plate is then used for printing.
  • Example 6 40 g. of the aforementioned compound V (see Table 2) are suspended in 100 cc. of 2% aqueous solution of Tamol NNO and then dispersed in 4900 cc. of a aqueous Luviskol K 90 solution (BASF), which is adjusted to a pH value of 4.3 with 10% phosphoric acid. The resulting dispersion is employed as in Example 1.
  • BASF a aqueous Luviskol K 90 solution
  • Example 7 50 g. of the aforementioned compound VII (see Table 2) are suspended in 2.5 cc. of Teepol, 2.5 cc. of 20% Hostapan A and 100 cc. of Polyglycol P 400. The resulting suspension is dispersed in 4900 cc. of 2.5% aqueous carboxymethyl cellulose solution and the pH of the dispersion is adjusted to 4.1 with phosphoric acid. The dispersion is employed as in Example 1.
  • Example 8 60 g. of the aforementioned compound VI (see Table 2) are suspended in 6.0 cc. of highly concentrated Texapon Z (20% aqueous solution) and 150 cc. of Polyglycol P 400. The resulting suspension is dispersed in 4850 cc. of a 2% aqueous solution of sodium alginate (Algipon P III solution, Henkel & (10.), which contains 436 g. of primary potassium phosphate and 48.5 g. of secondary sodium phosphate and which has a pH value of 5.7. The dispersion is employed as in Example 1.
  • Example 9 50 g. of the aforementioned compound VII (see Table 2) are mixed with 10 cc. of a 20% solution of the Teepol (see Table 4) and cc. of a 1.5% aqueous solution of propylene glycol ester of alginic acid in a mixing apparatus and are dispersed in 4890 cc. of a 1% solution of the above mentioned alginic acid ester. The dispersion is employed as in Example 1.
  • Example 10 60 g. of the aforementioned compound VII (see Table 2) are mixed with 12 cc. of a 10% aqueous solution of the Texapon Z (see Table 4) and cc. of a 1.5% aqueous solution of the amide of alginic acid in a mixing apparatus. Said mixture is dispersed in a mixture of 1850 cc. of a 1% aqueous solution of propylene glycol ester of alginic acid and 3000 cc. of a 2% aqueous solution of carboxymethyl cellulose. The pH value of the dispersion is adjusted to 4.1 with 10% phosphoric acid.
  • Example 11 50 g. of the aforementioned compound II (see Table 1) are mixed with 10 g. of the Polystate (see Table 4), 25 cc. Polyglycol P 300 and 50 cc. of a 1% aqueous solution of caragheenate in a mixing apparatus and dispersed in 4900 cc. of a 1% aqueous solution of caragheenate. The dispersion is employed as described in Example 1.
  • Example 12 70 g. of the aforementioned compound XII (see Table 2) are suspended in 35 g. of the Tween 40 (see Table 4) and 50 cc. Polyglycol P 600 and dispersed in 4900 cc. of a 2.5% aqueous solution of carboxymethyl cellulose. The dispersion is adjusted to a pH value of 4.3 with phosphoric acid. The resulting dispersion is employed as disclosed in Example 1.
  • Example 13 Example 14 50 g. of the aforementioned compound XI (see Table 2) are suspended in 25 g. of the Texapon Z (see Table 4), 25 cc. of Polyglycol P 300 and 50 cc. of a 1% aqueous solution of caragheenate. This suspension is dispersed in 4900 cc. of a 1.5% aqueous solution of the propylen glycol ester of alginic acid. The dispersion is employed as described in Example 1.
  • a planographic printing form comprising an aluminium plate having superimposed thereon at least one image consisting essentially of silver particles, said image being rendered hydrophobic and receptive to greasy pn'nt ing inks by the direct application thereon of an effective amount of a 2-mercapto -1,3,4-thiodiazole having the formula wherein Z stands for a bivalent member selected from the group consisting of (1) alkylene having up to 6 carbon atoms; (II) --SAS, wherein A is a member selected from the group consisting of alkylene of 1-10 carbon atoms, phenyla'lkylene, [CH --(CH wherein m is 2-4 and n is 1-4; and (HI) NHBNH wherein B is a member selected from the group consisting of alkylene of 4-10 carbon atoms, cyclohexylene, phenylene, diphenylene, and phenylalkylene.
  • a process for producing planographic printing plates consisting in developing an imagewise exposed silver halide emulsion layer while in contact with an aluminum plate in a silver halide developer solution containing a silver "halide solvent for dissolving silver halide from the unexposed areas of said silver halide emulsion layer, transferring the dissolved unexposed silver halide to said aluminum plate and reducing the dissolved silver halide on said aluminium plate to obtain a corresponding silver image, characterized in thereafter contacting said silver image directly with a hydrophobing amount of a Z-mercapto- 1,3,4-thiodiazole having the formula N HS("3 (i-z-ii -HS wherein Z stands for a bivalent member selected from the group consisting of (I) alkylene having up to 6 carbon atoms; (II) SAS-, wherein A is a member selected from the group consisting of alkylene of 1-10 carbon atoms, phenylalkylene, [(CH O(CH wherein m is

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
US58181A 1959-09-26 1960-09-26 Process for the production of planographic printing plates having an aluminum support Expired - Lifetime US3223524A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
NL256257D NL256257A (en, 2012) 1959-09-26
DEA32938A DE1217784B (de) 1959-09-26 1959-09-26 Verfahren zur Herstellung von Flachdruckformen mit einer Aluminiumunterlage
CH1084560A CH390058A (de) 1959-09-26 1960-09-26 Verfahren zur Herstellung von Flachdruckformen mit einer Aluminiumunterlage
US58181A US3223524A (en) 1959-09-26 1960-09-26 Process for the production of planographic printing plates having an aluminum support
FR839501A FR1270868A (fr) 1959-09-26 1960-09-26 Procédé de production de plaques de tirage planographique ayant un support en aluminium
GB33022/60A GB942822A (en) 1959-09-26 1960-09-26 A process for the production of planographic printing plates having an aluminium support
GB17813/63A GB942823A (en) 1959-09-26 1960-09-26 A process for the production of planographic printing plates having an aluminium support
DEA37064A DE1227341B (de) 1959-09-26 1961-03-27 Verfahren zur Herstellung von Flachdruckformen mit einer Aluminiumunterlage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEA32938A DE1217784B (de) 1959-09-26 1959-09-26 Verfahren zur Herstellung von Flachdruckformen mit einer Aluminiumunterlage
US58181A US3223524A (en) 1959-09-26 1960-09-26 Process for the production of planographic printing plates having an aluminum support

Publications (1)

Publication Number Publication Date
US3223524A true US3223524A (en) 1965-12-14

Family

ID=25963395

Family Applications (1)

Application Number Title Priority Date Filing Date
US58181A Expired - Lifetime US3223524A (en) 1959-09-26 1960-09-26 Process for the production of planographic printing plates having an aluminum support

Country Status (5)

Country Link
US (1) US3223524A (en, 2012)
CH (1) CH390058A (en, 2012)
DE (2) DE1217784B (en, 2012)
GB (2) GB942823A (en, 2012)
NL (1) NL256257A (en, 2012)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3454398A (en) * 1966-08-29 1969-07-08 American Photocopy Equip Co Method of forming a lithographic plate by treating silver halide with a terminal ethynyl compound to form an ink receptive image area
US3841218A (en) * 1971-07-23 1974-10-15 Fuji Photo Film Co Ltd Lithographic printing plates
EP0676670A1 (en) * 1994-04-08 1995-10-11 Agfa-Gevaert N.V. A method for making improved lithographic printing plates according to the silver salt diffusion transfer process
EP0681219A3 (en) * 1994-04-08 1996-04-10 Agfa Gevaert Nv Method for the manufacture of an offset printing plate according to the diffusion-transfer process of silver salt.
EP0848295A1 (en) * 1996-12-10 1998-06-17 Agfa-Gevaert N.V. A method for making an offset printing plate according to the silver salt diffusion transfer process
EP1266951A3 (en) * 1999-10-20 2003-06-18 R.T. Vanderbilt Company, Inc. Thiadiazole additives and lubricating compositions containing the same
US6620771B2 (en) * 1999-10-20 2003-09-16 R. T. Vanderbilt Company, Inc. Thiadiazole dimer additives and lubricating compositions containing the same
US20100247360A1 (en) * 2004-10-22 2010-09-30 The Texas A&M University System Gerotor Apparatus for a Quasi-Isothermal Brayton Cycle Engine
CN114805244A (zh) * 2022-05-19 2022-07-29 贵州大学 双-(1,3,4-噻二唑)类衍生物及其制备方法和应用

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5118583A (en) * 1988-10-12 1992-06-02 Mitsubishi Paper Mills Limited Processing composition for printing plate

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE572336A (en, 2012) * 1957-10-25
BE582161A (en, 2012) * 1958-08-29
US2184288A (en) * 1937-06-14 1939-12-26 Du Pont Photographic and printing media
US2352014A (en) * 1941-07-21 1944-06-20 Rott Andre Photomechanical printing process and printing material for carrying out the same
US2514650A (en) * 1946-04-05 1950-07-11 Eastman Kodak Co Photographic developing with addition products to improve image quality
US2685588A (en) * 1952-03-28 1954-08-03 Sharples Chemicals Inc Reaction products of 1, 3, 4-thiadiazole-2, 5-dithol and nu-substituted thiocarbamylhalides and their preparation
GB760181A (en) * 1953-08-19 1956-10-31 Basf Ag Improvements in the production of substitution products of 1.3.4-thiadiazole
US2891961A (en) * 1957-12-16 1959-06-23 American Cyanamid Co Process for preparing 2-amino-5-mercap-to-1, 3, 4-thiadiazole
US3083097A (en) * 1957-04-26 1963-03-26 Agfa Ag Bleaching silver images in the formation of printing plates

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2184288A (en) * 1937-06-14 1939-12-26 Du Pont Photographic and printing media
US2352014A (en) * 1941-07-21 1944-06-20 Rott Andre Photomechanical printing process and printing material for carrying out the same
US2514650A (en) * 1946-04-05 1950-07-11 Eastman Kodak Co Photographic developing with addition products to improve image quality
US2685588A (en) * 1952-03-28 1954-08-03 Sharples Chemicals Inc Reaction products of 1, 3, 4-thiadiazole-2, 5-dithol and nu-substituted thiocarbamylhalides and their preparation
GB760181A (en) * 1953-08-19 1956-10-31 Basf Ag Improvements in the production of substitution products of 1.3.4-thiadiazole
US3083097A (en) * 1957-04-26 1963-03-26 Agfa Ag Bleaching silver images in the formation of printing plates
BE572336A (en, 2012) * 1957-10-25
US2891961A (en) * 1957-12-16 1959-06-23 American Cyanamid Co Process for preparing 2-amino-5-mercap-to-1, 3, 4-thiadiazole
BE582161A (en, 2012) * 1958-08-29
BE582160A (en, 2012) * 1958-08-29

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3454398A (en) * 1966-08-29 1969-07-08 American Photocopy Equip Co Method of forming a lithographic plate by treating silver halide with a terminal ethynyl compound to form an ink receptive image area
US3841218A (en) * 1971-07-23 1974-10-15 Fuji Photo Film Co Ltd Lithographic printing plates
EP0676670A1 (en) * 1994-04-08 1995-10-11 Agfa-Gevaert N.V. A method for making improved lithographic printing plates according to the silver salt diffusion transfer process
EP0681219A3 (en) * 1994-04-08 1996-04-10 Agfa Gevaert Nv Method for the manufacture of an offset printing plate according to the diffusion-transfer process of silver salt.
EP0848295A1 (en) * 1996-12-10 1998-06-17 Agfa-Gevaert N.V. A method for making an offset printing plate according to the silver salt diffusion transfer process
EP1266951A3 (en) * 1999-10-20 2003-06-18 R.T. Vanderbilt Company, Inc. Thiadiazole additives and lubricating compositions containing the same
US6620771B2 (en) * 1999-10-20 2003-09-16 R. T. Vanderbilt Company, Inc. Thiadiazole dimer additives and lubricating compositions containing the same
US20100247360A1 (en) * 2004-10-22 2010-09-30 The Texas A&M University System Gerotor Apparatus for a Quasi-Isothermal Brayton Cycle Engine
CN114805244A (zh) * 2022-05-19 2022-07-29 贵州大学 双-(1,3,4-噻二唑)类衍生物及其制备方法和应用

Also Published As

Publication number Publication date
NL256257A (en, 2012)
CH390058A (de) 1965-03-31
DE1217784B (de) 1966-05-26
GB942822A (en) 1963-11-27
DE1227341B (de) 1966-10-20
GB942823A (en) 1963-11-27

Similar Documents

Publication Publication Date Title
US3223524A (en) Process for the production of planographic printing plates having an aluminum support
DE3203661C2 (en, 2012)
EP0535678B1 (en) Preparation of lithographic printing plate and diffusion transfer processing solution used therefor
EP0314425B1 (en) Non-ionic surface active compounds and photographic materials containing them
DE69524304T2 (de) Verfahren zur Herstellung von Negativbildern mit ultrahohem Kontrast und photographisches Silberhalogenidmaterial und Entwickler dafür
DE3016732C2 (de) Flachdruckplatte und Verfahren zur Herstellung einer Flachdruckform
DE3022572C2 (de) Verfahren zur Herstellung von Flachdruckformen nach dem Silbersalzdiffusionsübertragungsverfahren, Entwicklerlösungen und Flachdruckplatten hierfür
US2596742A (en) Nu-substituted ethylene thioureas
DE2654882A1 (de) Photographische silberhalogenidemulsionen sowie verfahren zu deren herstellung
DE19733725B4 (de) Verfahren zur Herstellung einer lithographischen Druckplatte
EP0618491B1 (de) Verfahren zur Erzeugung von Negativbildern mit ultrasteilem Kontrast
US2843481A (en) Photographic processes
DE69508387T2 (de) Feuchtwasserkonzentrat mit verbesserter Lagerfähigkeit für den Lithodruck mit nach dem Silberdiffusiontransferverfahren hergestellten Druckplatten
EP0049686A1 (en) Hydroquinone derivatives, their preparation and use in photographic materials
US3432298A (en) Silver salt diffusion process
US3236642A (en) Process for producing direct positives by the silver salt diffusion process
US3053656A (en) Photographic silver halide developers containing triazine rings
DE19853216B4 (de) Verfahren zur Herstellung einer lithographischen Druckplatte und in demselben zu verwendende Behandlungslösung
US3650742A (en) Oleophilizing gelatinous images
US3330658A (en) Photographic silver halide diffusion transfer process
US5738969A (en) Process for treating plate surface of lithographic printing plate
US5851723A (en) Process for making lithographic printing plate
DE69503017T2 (de) Feuchtwasserzusammensetzung für den Offsetdruck und Druckverfahren damit
GB869977A (en) Diazacycloalkenes and the preparation thereof
DE69510341T2 (de) Feuchtwasserkonzentrat mit verbesserter Antifleckenaktivität für nach dem Verfahren der Silbersalz-Diffusions-Übertragung hergestellte lithographische Druckplatten