US3440050A - Lithographic plate - Google Patents

Lithographic plate Download PDF

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Publication number
US3440050A
US3440050A US430753A US3440050DA US3440050A US 3440050 A US3440050 A US 3440050A US 430753 A US430753 A US 430753A US 3440050D A US3440050D A US 3440050DA US 3440050 A US3440050 A US 3440050A
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US
United States
Prior art keywords
aluminum
sensitive
light
plates
plate
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
US430753A
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English (en)
Inventor
Simon Chu
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Polychrome Corp
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Polychrome Corp
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Filing date
Publication date
Application filed by Polychrome Corp filed Critical Polychrome Corp
Application granted granted Critical
Publication of US3440050A publication Critical patent/US3440050A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B41N3/03—Chemical or electrical pretreatment
    • B41N3/038—Treatment with a chromium compound, a silicon compound, a phophorus compound or a compound of a metal of group IVB; Hydrophilic coatings obtained by hydrolysis of organometallic compounds

Definitions

  • lithographic light-sensitive plates having an anodized aluminum base sheet, a reaction product on the surface of the aluminum base sheet formed by a reaction between the anodized aluminum surface and a Group IV-B metal fluoride, and a light-sensitive coating thereover.
  • This invention relates to sheet materials useful for photochemical processes such as the preparation of lithographic plates, and relates particularly to sheet materials which comprise an aluminum base having overcoats of a light-sensitive material such as the various diazo compounds known to the art.
  • lithographic printing depends upon a printing surface having both hydrophilic and hydrophobic areas and the consequent preferential retention of greasy image-forming substances by the hydrophobic areas with a similar retention of an oleophobic dampening fluid by the hydrophilic areas.
  • the light-sensitive compound is the condensation product of paradiazodiphenylamine with formaldehyde, such as paraformaldehyde zinc chloride. This condensation is carried out in concentrated sulfuric acid and the process and product formed thereby are well known in the lithographic printing art.
  • the diazo product is in fact a zinc chloride double salt.
  • diazo shall be meant to include not only lightsensitive diazo compounds which are known to the art such as the aforementioned double salt but is also in tended to include the reaction products of certain coupling agents and diazos as disclosed in the copending application U.S. Ser. No. 307,025, filed by Simon Chu on Sept. 6, 1963, now Patent No. 3,300,309, and other light-sensitive diazo reaction products, for example, the reaction product of a diazo and potassium ferrocyanide disclosed in US. Patent 3,113,023.
  • nitrogen containing compound is used to define, not only diazo compounds discussed above, but also azides and other such light-sensitive compounds known to the art.
  • the aluminum used as the base sheet is preferably 99% or more pure.
  • aluminum alloys such as the 1100 or 1145 alloys are suitable. Purer alloys than these two types would not appear to have any advantage because they would have less mechanical strength and would be higher in cost.
  • the anodizing processing is carried out as is substantially known to the art.
  • the electrolyte is advantageously a 0.5 to 2.0% solution of hydrochloric acid.
  • the temperature of the anodizing bath is usually maintained between 15 C. and C.
  • the time of anodization is desirably between about 5 to 20 minutes at 6 to 14 volts.
  • the spacing of the plates being anodized is conveniently from 1.5 to 4.0 inches. It will be understood by those skilled in the art that the time required for the anodization process will be reduced as the acid temperature is increased or as the voltage is increased.
  • plates are immersed in a dilute basic solution, such as a 1% aqueous solution of ammonia. This step is taken in order to neutralize the surface of the plate on which residual hydrochloric acid may be present after the anodization process.
  • a dilute basic solution such as a 1% aqueous solution of ammonia.
  • the treatment with the base is followed by reacting the plates in a hot aqueous bath of a compound such as zirconium fluoride from about 30 seconds to 5 minutes at a temperature of from about to C. to form a hydrophilic layer of the aluminum plate.
  • the potassium zirconium fiuoride solution is suitably of from about 0.5 to 1% concentration.
  • Compounds useful for forming a hydrophilic layer include not only zirconium compounds but also compounds of the other Group IV-B compounds, i.e.,'
  • salts of the formula MlMzF in which M is hydrogen, in alkali metal, an alkaline earth metal or an ammonium cation, M is selected from Ti, Zr or Hf, and n is 5 or 6, may also be advantageously used in the process of the present invention.
  • M is hydrogen, in alkali metal, an alkaline earth metal or an ammonium cation
  • M is selected from Ti, Zr or Hf
  • n is 5 or 6
  • U.S. Patent 3,160,506 contains further information relating to the use of these compounds on aluminum sheets preparatory to coating a lightsensitive layer thereover.
  • Na ZrF KZIFS, KZZI'FS, KzTlFg, K HfF NZlHfF5, and H ZrF Plates prepared as described above can be used for lithographic printing.
  • a longer shelf life can be obtained and scumming can be prevented by subjecting the plates to an additional mild alkali treatment.
  • This treatment neutralizes any of the fluoride coating which may remain on the surface of the aluminum, and which would tend to oxidize and then react to form hydrophobic areas with the subsequently applied light-sensitive coating.
  • This additional alkali treatment can be advantageously carried out by submerging the plate in a 0.5 to aqueous solution of potassium tetrapyrophosphate at a temperature from 55 C. to 65 C.
  • the plate, prepared as described above, is in condition for shipment to the printer who would wipe on a light sensitive compound and proceed with the processing and use of the plate as is known in the art.
  • an additional acidifying step is highly desirable wherein an aqueous solution of about 0.005% of a compound such as K ZrF (or a dilute acetic acid solution) is used to acidify the plate surface at room temperature.
  • a compound such as K ZrF (or a dilute acetic acid solution) is used to acidify the plate surface at room temperature.
  • the plate is subsequently dried and coated with a light sensitive diazo compound.
  • a sheet adapted to receive a light-sensitive coating to form a lithographic printing plate which comprises an aluminum base sheet, said aluminum base sheet having an anodized surface thereon, and a hydrophilic coating on said anodized surface, said coating being essentially the reaction product of said anodized aluminum surface and a Group IV-B metal fluoride compound of the formula M 1 or of the formula M M F in which M is a 4 hydrogen, an alkali metal, an alkaline earth metal or an ammonium cation, M is a Ti, Zr or Hf cation, and n is the integer 5 or 6.
  • a lithographic plate comprising an aluminum base sheet, said aluminum base sheet having an anodized surface thereon, a hydrophilic coating on said anodized surface, said coating being essentially the reaction product of said anodized aluminum surface and a metal fluoride compound of the formula M 1 or of the formula M M F in which M is a hydrogen, an alkali metal, an alkaline earth metal or an ammonium cation, M is a Ti, Zr or Hf cation, and n is the integer 5 or 6, and a light-sensitive nitrogen compound coated over said hydrophilic coating.
  • a lithographic plate according to claim 2 wherein said metal fluoride compound is a zirconium fluoride salt.
  • a lithographic plate according to claim 2 wherein said light-sensitive nitrogen compound is a condensation product of paradiazodiphenylamine and formaldehyde.
  • a lithographic plate according to claim 2 wherein said light-sensitive nitrogen compound is a reaction product of (1) a condensation product of paradiazodiphenylamine and formaldehyde and (2) a coupling agent therefor.
  • a process for making a lithographic plate which comprises anodizing a surface of an aluminum base sheet, reacting the anodized surface of said aluminum base sheet with essentially a metal fluoride compound of the formula M 1 or of the formula M M F in which M is a hydrogen, an alkali metal, an alkaline earth metal or an ammonium cation, M is a Ti, Zr or Hf cation, and n is the integer 5 or 6, to form a hydrophilic reaction product layer on said base sheet, and coating a light-sensitive nitrogen compound over said hydrophilic reaction product layer.
  • a process according to claim 6 wherein said metal fluoride compound is potassium zirconium fluoride.
  • said lightsensitive nitrogen compound is a condensation product of paradiazodiphenylamine and formaldehyde.
  • said lightsensitive nitrogen compound is a reaction product of (l) a condensation product of paradiazodiphenylamine and formaldehyde and (2) a coupling agent therefor.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Printing Plates And Materials Therefor (AREA)
US430753A 1965-02-05 1965-02-05 Lithographic plate Expired - Lifetime US3440050A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US43075365A 1965-02-05 1965-02-05

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US3440050A true US3440050A (en) 1969-04-22

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US430753A Expired - Lifetime US3440050A (en) 1965-02-05 1965-02-05 Lithographic plate

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US (1) US3440050A (enrdf_load_stackoverflow)
DE (1) DE1300415B (enrdf_load_stackoverflow)
GB (1) GB1128506A (enrdf_load_stackoverflow)
SE (1) SE314994B (enrdf_load_stackoverflow)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3658662A (en) * 1969-01-21 1972-04-25 Durolith Corp Corrosion resistant metallic plates particularly useful as support members for photo-lithographic plates and the like
US3765894A (en) * 1967-04-03 1973-10-16 Polychrome Corp Elevated image printing plate
FR2308956A1 (fr) * 1975-04-21 1976-11-19 Minnesota Mining & Mfg Plaques lithographiques et leur preparation
US4090880A (en) * 1977-03-03 1978-05-23 Polychrome Corporation Lithographic printing plate and method of making same
FR2388305A1 (fr) * 1977-04-18 1978-11-17 Polychrome Corp Traitement ameliore des plaques d'impression lithographique par une couche intermediaire
US4152158A (en) * 1971-10-08 1979-05-01 Polychrome Corporation Electrochemically treated photo-lithographic plates
US4159227A (en) * 1976-03-22 1979-06-26 Sundquist Charles T Dual temperature direct contact condenser sumps
US4301229A (en) * 1978-03-27 1981-11-17 Fuji Photo Film Co., Ltd. Electrolytically grained aluminum support for making a lithographic plate and presensitized lithographic printing plate
US4427765A (en) 1981-07-06 1984-01-24 Hoechst Aktiengesellschaft Hydrophilic coating of salt-type phosphorus or sulfur polymer on aluminum support materials for offset printing plates and process for manufacture and use with light sensitive layer thereon
US4427766A (en) 1981-07-06 1984-01-24 Hoechst Aktiengesellschaft Hydrophilic coating of salt type nitrogen polymer on aluminum support materials for offset printing plates and process for manufacture and use with light sensitive layer thereon
US4458005A (en) * 1981-07-06 1984-07-03 Hoechst Aktiengesellschaft Polyvinylmethylphosphinic acid, process for its manufacture and use
US4554216A (en) * 1982-02-23 1985-11-19 Hoechst Aktiengesellschaft Process for manufacturing support materials for offset printing plates
US4554057A (en) * 1982-02-23 1985-11-19 Hoechst Aktiengesellschaft Process for manufacturing support materials for offset printing plates
US4782000A (en) * 1986-08-16 1988-11-01 Basf Aktiengesellschaft Electrophotographic recording elements with hydrolyzed silane layer
US4935332A (en) * 1986-08-16 1990-06-19 Basf Aktiengesellschaft Photosensitive element having an aluminum base and silane intermediate layer
US5073475A (en) * 1989-08-31 1991-12-17 Basf Aktiengesellschaft Production of plate-like, sheet-like or tape-like materials and of sensitized lithographic printing plates
US5178963A (en) * 1990-07-21 1993-01-12 Hoechst Aktiengesellschaft Hydrophilic copolymers and their use in reprography
US5178961A (en) * 1990-07-21 1993-01-12 Hoechst Aktiengesellschaft Thermally crosslinkable hydrophilic copolymers and their use in reprography
US5219664A (en) * 1990-07-21 1993-06-15 Hoechst Aktiengesellschaft Hydrophilic copolymers and their use in reprography
US5262244A (en) * 1990-07-21 1993-11-16 Hoechst Aktiengesellschaft Hydrophilic copolymers and their use in reprography
US5302460A (en) * 1990-07-21 1994-04-12 Hoechst Aktiengesellschaft Support material for offset-printing plates in the form of a sheet, a foil or a web process for its production and offset-printing plate comprising said material
FR2780337A1 (fr) * 1998-06-29 1999-12-31 Okamoto Chemical Industry Co L Procede pour la formation d'un substrat d'aluminium pour une plaque lithographique et pour une plaque lithographique presensibilisee
WO2002000442A1 (en) * 2000-06-26 2002-01-03 Kodak Polychrome Graphics Co. Ltd. Imaging member containing heat-sensitive thiosulphate polymer andmethods of use
EP1176031A1 (en) * 2000-07-17 2002-01-30 Agfa-Gevaert Production of support for lithographic printing plate
US6540901B2 (en) 2000-07-17 2003-04-01 Agfa-Gevaert Production of support for lithographic printing plate

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL156092B (nl) * 1968-03-25 1978-03-15 Polychrome Corp Werkwijze voor de vervaardiging van een lithografische drukplaat.
US4966659A (en) * 1988-06-03 1990-10-30 Sumitomo Metal Industries, Ltd. Method for molten salt electroplating of steel

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2008733A (en) * 1932-05-26 1935-07-23 Aluminum Co Of America Treatment of coatings
US3030210A (en) * 1959-02-12 1962-04-17 Gen Aniline & Film Corp Treatment of metal surfaces for the manufacture of lithographic plates
US3066055A (en) * 1958-11-10 1962-11-27 Purex Corp Ltd Process and composition for producing aluminum surface conversion coatings
US3160506A (en) * 1962-10-19 1964-12-08 Polychrome Corp Planographic printing plate and method for preparing same
US3169065A (en) * 1960-10-11 1965-02-09 Harris Intertype Corp Method of making resist and deep etch lithographic printing plates with ferric ammonium compound sensitized plates
US3181461A (en) * 1963-05-23 1965-05-04 Howard A Fromson Photographic plate

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2008733A (en) * 1932-05-26 1935-07-23 Aluminum Co Of America Treatment of coatings
US3066055A (en) * 1958-11-10 1962-11-27 Purex Corp Ltd Process and composition for producing aluminum surface conversion coatings
US3030210A (en) * 1959-02-12 1962-04-17 Gen Aniline & Film Corp Treatment of metal surfaces for the manufacture of lithographic plates
US3169065A (en) * 1960-10-11 1965-02-09 Harris Intertype Corp Method of making resist and deep etch lithographic printing plates with ferric ammonium compound sensitized plates
US3160506A (en) * 1962-10-19 1964-12-08 Polychrome Corp Planographic printing plate and method for preparing same
US3181461A (en) * 1963-05-23 1965-05-04 Howard A Fromson Photographic plate

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3765894A (en) * 1967-04-03 1973-10-16 Polychrome Corp Elevated image printing plate
US3658662A (en) * 1969-01-21 1972-04-25 Durolith Corp Corrosion resistant metallic plates particularly useful as support members for photo-lithographic plates and the like
US4152158A (en) * 1971-10-08 1979-05-01 Polychrome Corporation Electrochemically treated photo-lithographic plates
FR2308956A1 (fr) * 1975-04-21 1976-11-19 Minnesota Mining & Mfg Plaques lithographiques et leur preparation
US4018605A (en) * 1975-04-21 1977-04-19 Minnesota Mining And Manufacturing Company Metal lithographic plate made imageable by diffusion transfer by treatment with Group IV-B metal fluoride
US4159227A (en) * 1976-03-22 1979-06-26 Sundquist Charles T Dual temperature direct contact condenser sumps
US4090880A (en) * 1977-03-03 1978-05-23 Polychrome Corporation Lithographic printing plate and method of making same
FR2388305A1 (fr) * 1977-04-18 1978-11-17 Polychrome Corp Traitement ameliore des plaques d'impression lithographique par une couche intermediaire
US4301229A (en) * 1978-03-27 1981-11-17 Fuji Photo Film Co., Ltd. Electrolytically grained aluminum support for making a lithographic plate and presensitized lithographic printing plate
US4427765A (en) 1981-07-06 1984-01-24 Hoechst Aktiengesellschaft Hydrophilic coating of salt-type phosphorus or sulfur polymer on aluminum support materials for offset printing plates and process for manufacture and use with light sensitive layer thereon
US4427766A (en) 1981-07-06 1984-01-24 Hoechst Aktiengesellschaft Hydrophilic coating of salt type nitrogen polymer on aluminum support materials for offset printing plates and process for manufacture and use with light sensitive layer thereon
US4458005A (en) * 1981-07-06 1984-07-03 Hoechst Aktiengesellschaft Polyvinylmethylphosphinic acid, process for its manufacture and use
US4554216A (en) * 1982-02-23 1985-11-19 Hoechst Aktiengesellschaft Process for manufacturing support materials for offset printing plates
US4554057A (en) * 1982-02-23 1985-11-19 Hoechst Aktiengesellschaft Process for manufacturing support materials for offset printing plates
US4782000A (en) * 1986-08-16 1988-11-01 Basf Aktiengesellschaft Electrophotographic recording elements with hydrolyzed silane layer
US4935332A (en) * 1986-08-16 1990-06-19 Basf Aktiengesellschaft Photosensitive element having an aluminum base and silane intermediate layer
US5073475A (en) * 1989-08-31 1991-12-17 Basf Aktiengesellschaft Production of plate-like, sheet-like or tape-like materials and of sensitized lithographic printing plates
US5219664A (en) * 1990-07-21 1993-06-15 Hoechst Aktiengesellschaft Hydrophilic copolymers and their use in reprography
US5178961A (en) * 1990-07-21 1993-01-12 Hoechst Aktiengesellschaft Thermally crosslinkable hydrophilic copolymers and their use in reprography
US5178963A (en) * 1990-07-21 1993-01-12 Hoechst Aktiengesellschaft Hydrophilic copolymers and their use in reprography
US5262244A (en) * 1990-07-21 1993-11-16 Hoechst Aktiengesellschaft Hydrophilic copolymers and their use in reprography
US5302460A (en) * 1990-07-21 1994-04-12 Hoechst Aktiengesellschaft Support material for offset-printing plates in the form of a sheet, a foil or a web process for its production and offset-printing plate comprising said material
FR2780337A1 (fr) * 1998-06-29 1999-12-31 Okamoto Chemical Industry Co L Procede pour la formation d'un substrat d'aluminium pour une plaque lithographique et pour une plaque lithographique presensibilisee
WO2002000442A1 (en) * 2000-06-26 2002-01-03 Kodak Polychrome Graphics Co. Ltd. Imaging member containing heat-sensitive thiosulphate polymer andmethods of use
US6465152B1 (en) 2000-06-26 2002-10-15 Kodak Polychrome Graphics Llc Imaging member containing heat sensitive thiosulfate polymer on improved substrate and methods of use
EP1176031A1 (en) * 2000-07-17 2002-01-30 Agfa-Gevaert Production of support for lithographic printing plate
US6540901B2 (en) 2000-07-17 2003-04-01 Agfa-Gevaert Production of support for lithographic printing plate

Also Published As

Publication number Publication date
GB1128506A (en) 1968-09-25
SE314994B (enrdf_load_stackoverflow) 1969-09-22
DE1300415B (de) 1969-07-31

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