EP0022033A1 - Offsetdruckplatten, die eine, mittels eines dünnen Chrombelags mattierte, hydrophile Oberfläche aufweisen - Google Patents

Offsetdruckplatten, die eine, mittels eines dünnen Chrombelags mattierte, hydrophile Oberfläche aufweisen Download PDF

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Publication number
EP0022033A1
EP0022033A1 EP80400982A EP80400982A EP0022033A1 EP 0022033 A1 EP0022033 A1 EP 0022033A1 EP 80400982 A EP80400982 A EP 80400982A EP 80400982 A EP80400982 A EP 80400982A EP 0022033 A1 EP0022033 A1 EP 0022033A1
Authority
EP
European Patent Office
Prior art keywords
chromium
layer
hydrophilic surface
micron
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.)
Granted
Application number
EP80400982A
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English (en)
French (fr)
Other versions
EP0022033B1 (de
Inventor
Jean-Marie Nouel
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.)
Innolith Sa Te Villers-La-Montagne Frankrijk
Original Assignee
Nouel Jean-Marie
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9227397&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0022033(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Nouel Jean-Marie filed Critical Nouel Jean-Marie
Publication of EP0022033A1 publication Critical patent/EP0022033A1/de
Application granted granted Critical
Publication of EP0022033B1 publication Critical patent/EP0022033B1/de
Expired 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
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/04—Printing plates or foils; Materials therefor metallic
    • B41N1/08—Printing plates or foils; Materials therefor metallic for lithographic printing
    • B41N1/10—Printing plates or foils; Materials therefor metallic for lithographic printing multiple
    • 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
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/04—Printing plates or foils; Materials therefor metallic
    • B41N1/08—Printing plates or foils; Materials therefor metallic for lithographic printing

Definitions

  • the present invention relates to new offset plates, the hydrophilic surface of which has been made "matt" by means of a thin layer of chromium.
  • offset reproduction methods use plates having a surface of hydrophilic nature. This same surface should advantageously be matt, this mattness being advantageous on the one hand, to facilitate the control work at the time of printing and on the other hand, to facilitate the attachment, on this surface, of a photosensitive layer .
  • This mattness can be obtained by treating the support of the plate or the surface in a material of hydrophilic nature by methods which call for an attack on said surface, either mechanically, chemically or electrochemically.
  • chromium has been widely described for producing the hydrophilic surface of an offset plate.
  • the chrome layers employed have notable advantages with regard to their hardness, their hydrophilicity and possibly their appearance. Indeed, these chromium layers can have a mat surface.
  • Two methods are known for electrochemically obtaining a layer of chromium with a mat surface, one consisting in using an electrolytic bath at low temperature (5 to 8 ° C. for example) and the other consisting in using an electrolytic bath at temperature below normal (25 to 35 ° C) but by performing an interruption of the electric current while carrying out said deposit. But in all known cases the chromium layer (with a shiny or mat surface) which must play the role of aquaphile layer of the offset plates must have a notable thickness (clearly greater than 1 micron and generally from 1.5 to 2.8 microns ).
  • hydrophilic chromium layers with a thickness of less than 1 micron could possibly be deposited on supports. But taking into account the examples provided, the specialists are well aware that the very thin layers recommended cannot play their role of hard aquaphile layers because they are scratched too easily and are often porous thus leaving appear an underlying surface with the properties unacceptable in offset reproduction. .
  • the invention therefore consists in depositing on a surface having hydrophilic properties which can be used in the sense of offset, a very thin layer of matt chromium, the relative porosity and brittleness of which will be accepted precisely because the underlying surface is hydrophilic and encrophobic, but which one will use to make "mat" the surface of the final material.
  • hydrophilic surfaces which can be made "matt" using the invention are all the surfaces which, to date, have been considered as hydrophilic surfaces usable in offset plates.
  • a 35/100 thick stainless steel plate with a shiny surface is used.
  • This plate is degreased in anode, rinsed and then immersed in a conventional chromium bath (250 g / 1 of chromic anhydride and 2.5 g of sulfuric acid per liter-temperature 28 °).
  • the plate is connected to the cathode; the current (15A dcm2) is switched on 15 seconds after immersion of the plate and is maintained until the chromium deposit has reached 0.3 micron in thickness with a power cut 15 seconds after the start of the deposit of chrome.
  • a matte appearance plate is obtained.
  • the plate is covered with a layer (approximately 1.8 microns thick) of photosensitive commercial printer (PCAS). After drying (3 min at 45 ° C and 5 min at 85 ° C) the plate is ready.
  • PCAS photosensitive commercial printer
  • the plate is then used as known in offset processes: insolation, rearing of soluble parts, exfoliation, etc.
  • the plate is thus covered with a smooth, hard and shiny layer of chromium which will provide it with good protection during handling.
  • This plate is then immersed in an electrolytic chromium bath with a composition identical to that of the bath described above, but it is operated at a temperature of 28 ° C. and is deposited, under 30 A by square decimetre, on only one of the faces of the plate a thickness of matt chrome of 0.4 micron.
  • a plate is thus obtained protected on all its faces by a layer of smooth chrome and which comprises, on one of its faces, a surface of matt chrome usable in offset.
  • a photosensitive printer layer is then deposited on the mat surface and a ready-made offset plate is obtained.
  • a chromed steel plate sold by the company SOLLAC is used as the starting plate.
  • the plate After hot degreasing (65 ° C) in a sodium carbonate bath (100 g / l), the plate being cathode, the plate is introduced into a chromium bath in order to achieve, on one of its faces, the deposit of a thin layer (0.3 micron for example) of matt chrome.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Cell Electrode Carriers And Collectors (AREA)
  • Laminated Bodies (AREA)
EP19800400982 1979-07-02 1980-06-30 Offsetdruckplatten, die eine, mittels eines dünnen Chrombelags mattierte, hydrophile Oberfläche aufweisen Expired EP0022033B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7917153A FR2460211A1 (fr) 1979-07-02 1979-07-02 Nouvelle plaque offset a surface rendue mate par du chrome
FR7917153 1979-07-02

Publications (2)

Publication Number Publication Date
EP0022033A1 true EP0022033A1 (de) 1981-01-07
EP0022033B1 EP0022033B1 (de) 1984-09-05

Family

ID=9227397

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800400982 Expired EP0022033B1 (de) 1979-07-02 1980-06-30 Offsetdruckplatten, die eine, mittels eines dünnen Chrombelags mattierte, hydrophile Oberfläche aufweisen

Country Status (8)

Country Link
EP (1) EP0022033B1 (de)
JP (1) JPS5637192A (de)
BR (1) BR8004111A (de)
CA (1) CA1133755A (de)
DE (1) DE3069101D1 (de)
ES (1) ES8200273A1 (de)
FR (1) FR2460211A1 (de)
MX (1) MX156999A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3115201A1 (de) * 1980-04-16 1982-01-28 Jean-Marie 75008 Paris Nouel "offsetdruckplatte aus stahl als grundplatte"
EP0098776A2 (de) * 1982-07-02 1984-01-18 INNOLITH, société anonyme Flachdruckplatte aus Stahl mit mehreren Chromschichten
WO1990002044A2 (en) * 1988-08-19 1990-03-08 Presstek, Inc. Lithography plates and method and means for imaging them

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6131355A (ja) * 1984-07-20 1986-02-13 工業技術院長 黒鉛−炭化ホウ素系摺動部材
JPH02131992A (ja) * 1989-06-14 1990-05-21 Konica Corp 平版印刷版用支持体

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB475902A (en) * 1936-05-29 1937-11-29 Arthur Ronald Trist Improvements in and relating to printing plates for lithography
GB640470A (en) * 1947-09-04 1950-07-19 Coates Brothers & Co Improvements in the manufacture of lithographic printing plates
DE806315C (de) * 1949-10-18 1951-06-14 Roman Freundorfer Offsetdruckplatte und Verfahren zur Herstellung derselben
FR82759E (fr) * 1962-09-27 1964-04-17 Le Quadrimetal Offset Sa Pour Procédé d'impression offset et produits industriels en résultant
GB1172517A (en) * 1965-12-02 1969-12-03 Rotaprint Ltd Photochemical Production of Plates for Offset Lithography
BE779229A (en) * 1972-02-10 1972-05-30 Centre Rech Metallurgique Offset printing plates - have a steel support with a chromium layer and a radiation sensitive layer,prodn
EP0012066A1 (de) * 1978-11-29 1980-06-11 Jean-Marie Nouel Wasserannehmende Schicht für Offsetdruckplatten und erhaltene Platten

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5131507A (ja) * 1974-09-11 1976-03-17 Fuji Photo Film Co Ltd Ofusetsutoinsatsubanyoshijitai

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB475902A (en) * 1936-05-29 1937-11-29 Arthur Ronald Trist Improvements in and relating to printing plates for lithography
GB640470A (en) * 1947-09-04 1950-07-19 Coates Brothers & Co Improvements in the manufacture of lithographic printing plates
DE806315C (de) * 1949-10-18 1951-06-14 Roman Freundorfer Offsetdruckplatte und Verfahren zur Herstellung derselben
FR82759E (fr) * 1962-09-27 1964-04-17 Le Quadrimetal Offset Sa Pour Procédé d'impression offset et produits industriels en résultant
GB1172517A (en) * 1965-12-02 1969-12-03 Rotaprint Ltd Photochemical Production of Plates for Offset Lithography
BE779229A (en) * 1972-02-10 1972-05-30 Centre Rech Metallurgique Offset printing plates - have a steel support with a chromium layer and a radiation sensitive layer,prodn
EP0012066A1 (de) * 1978-11-29 1980-06-11 Jean-Marie Nouel Wasserannehmende Schicht für Offsetdruckplatten und erhaltene Platten

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 78, no. 10, 12 mars 1973, page 490, réf. 65302e, Columbus, Ohio, US, & BE-A-779 229 (CENTRE NATIONAL DE RECHERCHES METALLURGIQUES)(30-05-1972) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3115201A1 (de) * 1980-04-16 1982-01-28 Jean-Marie 75008 Paris Nouel "offsetdruckplatte aus stahl als grundplatte"
EP0098776A2 (de) * 1982-07-02 1984-01-18 INNOLITH, société anonyme Flachdruckplatte aus Stahl mit mehreren Chromschichten
EP0098776A3 (en) * 1982-07-02 1985-04-10 Jean-Marie Nouel Steel lithographic printing plate having multiple chromium layers
WO1990002044A2 (en) * 1988-08-19 1990-03-08 Presstek, Inc. Lithography plates and method and means for imaging them
WO1990002044A3 (en) * 1988-08-19 1990-08-23 Presstek Inc Lithography plates and method and means for imaging them

Also Published As

Publication number Publication date
MX156999A (es) 1988-10-19
BR8004111A (pt) 1981-01-21
CA1133755A (en) 1982-10-19
EP0022033B1 (de) 1984-09-05
ES492985A0 (es) 1981-10-16
FR2460211B1 (de) 1984-07-06
JPS5637192A (en) 1981-04-10
JPH0322314B2 (de) 1991-03-26
FR2460211A1 (fr) 1981-01-23
DE3069101D1 (en) 1984-10-11
ES8200273A1 (es) 1981-10-16

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