EP0012673A1 - Offsetdruckplatte verwendbar als eine Einmetallplatte mit einer druckenden Oberflächenschicht und diese Platte verwendendes Offsetdruckverfahren - Google Patents

Offsetdruckplatte verwendbar als eine Einmetallplatte mit einer druckenden Oberflächenschicht und diese Platte verwendendes Offsetdruckverfahren Download PDF

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Publication number
EP0012673A1
EP0012673A1 EP79400974A EP79400974A EP0012673A1 EP 0012673 A1 EP0012673 A1 EP 0012673A1 EP 79400974 A EP79400974 A EP 79400974A EP 79400974 A EP79400974 A EP 79400974A EP 0012673 A1 EP0012673 A1 EP 0012673A1
Authority
EP
European Patent Office
Prior art keywords
plate
veil
layer
printing
copper
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.)
Withdrawn
Application number
EP79400974A
Other languages
English (en)
French (fr)
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.)
Individual
Original Assignee
Individual
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 claimed from FR7834955A external-priority patent/FR2443935A1/fr
Priority claimed from FR7917152A external-priority patent/FR2460210B2/fr
Application filed by Individual filed Critical Individual
Publication of EP0012673A1 publication Critical patent/EP0012673A1/de
Withdrawn legal-status Critical Current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
    • 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
    • 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

Definitions

  • the present invention relates to a new offset plate, using a single metal plate, comprising a printer layer.
  • monometallic plates i.e. plates in which a monometallic surface
  • a monometallic surface the term monometallic being used here to cover simultaneously the use of metals or alloys, plays the role of aquaphile surface.
  • a surface is for example made of stainless steel, chromium, tin, nickel tin, aluminum, aluminum alloy or hydrophilic zinc.
  • This surface is the surface of a support which is made of the same metal or alloy or which is made of a different metal.
  • plates with a copper-steel support and with a chromium surface are known.
  • a photosensitive printer layer On said monometallic surface is deposited a photosensitive printer layer, positive or negative.
  • This non-hydrophilic derivative may be a metal, a metal alloy, a varnish or a resin or a combination of these products.
  • this derivative must be able to be fixed firmly by known means on the surface.
  • the non-hydrophilic derivative veil deposited between the aquaphile surface and the printing layer, has a particular color and / or structure. So for example when said veil is constituted by a deposit of copper or tin or zinc ... it is advantageous, before depositing the printing layer, to attack this metallic veil using known commercial substances in order to give birth to porous and possibly blackened or colored surfaces.
  • the embodiment of the veil must be chosen as a function of the metal or alloy to be deposited on the one hand and on the other hand as a function of the aquaphile monometallic surface which it is desired to cover the main known processes for depositing this veil are the chemical displacement of a metal contained in a bath or electrolysis.
  • said veil must be made of a material such as a varnish or a resin, known techniques will be used for this type of material.
  • An aluminum plate 25/100 thick is used, the surface of which has been degreased, brushed but not anodized.
  • a veil of 0.02 micron thick of zinc was deposited with the "zincate process" consisting in dipping the aluminum plate for approximately 30 seconds in a bath containing in particular zinc salts.
  • Such a process is for example described in CANNING HANDBOOK ON ELECTROPLATING (22nd edition) Canning Lt page 350.
  • a layer of approximately 1 to 2 microns of photosensitive layer was deposited, for example a negative photosensitive layer.
  • the photosensitive layer After exposure of said layer, the photosensitive layer is treated with a developing solution which dissolves the parts of the layer which are not hardened; then the whole is treated with a 15% nitric acid solution which removes the zinc veil in places where the surface of the zinc is no longer covered with a printing layer. After washing, a directly usable plate is obtained in which the aluminum surface acts as an aquaphile surface.
  • a brushed stainless steel plate is used. This plate is soaked in an acid copper plating bath by electrolysis and this electrolysis is carried out until a copper deposit of the order of 0.2 microns is obtained. On this copper surface is deposited a negative photosensitive layer about 1.5 microns thick.
  • the photosensitive layer is treated with a developing solution and then the exposed parts of the copper veil are removed using a solution of nitric acid (copper bite) so as to expose the corresponding parts.
  • a solution of nitric acid copper bite
  • the pH of the bath being 8.5, the current density of A / dm2 and the temperature of 55 ° C.
  • the plate is removed from the bath when a 0.08 micron layer of copper has settled.
  • the aluminum turns red indicating the formation of a layer of copper.
  • remove the excess solution with a squeegee then pour in isopropyl alcohol which is quickly removed with cellulose wadding to dry the surface. Then it is coated with a photosensitive layer as indicated above.
  • the uncured parts After exposure the uncured parts are removed with a developing solution and then with a special bite solution to destroy the copper on aluminum (Bi-metal Polychrome bite) copper can be removed in less than 30 "in the developed areas. After rinsing and scrub the plate is ready to go in the machine.
  • a stainless steel plate is used which is covered, as in Example 2, with copper, the thickness of the copper deposit is 0 micron 7.
  • said plate After rinsing, said plate is soaked in a bath of a product sold by the company IMASA under the name of Ebonol C and which is sold for carrying out the blackening of copper surfaces.
  • the copper becomes matt black and porous and the thickness is reduced to around 0 micron 1.
  • the plate is then coated with 1 micron 8 of a positive photosensitive layer printer, after exposure and development.
  • the black copper is destroyed by a biting solution as in Example 2.
  • the printing parts are very dark and contrast sharply with the aquaphile surface. Control is thus much easier.
  • the coated plate After drying, the coated plate is baked at 220 ° for a few seconds causing this resin to harden. Then the surface is covered with 1 micron 8 of photosensitive printer layer.
  • the plate After insolation and development, the plate is attacked with a known solution used in offset technique for the bite of copper or tin; said solution is sufficient to remove on the one hand, the thin layer of ALNOVOL resin and on the other hand, the veil of copper or tin.
  • the aquaphile surface is thus exposed.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
EP79400974A 1978-12-12 1979-12-06 Offsetdruckplatte verwendbar als eine Einmetallplatte mit einer druckenden Oberflächenschicht und diese Platte verwendendes Offsetdruckverfahren Withdrawn EP0012673A1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR7834955A FR2443935A1 (fr) 1978-12-12 1978-12-12 Nouvelle plaque offset a utilisation de plaque monometallique comportant une couche imprimante et procede d'impression offset utilisant ladite plaque
FR7834955 1978-12-12
FR7917152 1979-07-02
FR7917152A FR2460210B2 (fr) 1979-07-02 1979-07-02 Procede ameliore pour la preparation de plaques offset et plaques obtenues

Publications (1)

Publication Number Publication Date
EP0012673A1 true EP0012673A1 (de) 1980-06-25

Family

ID=26220907

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79400974A Withdrawn EP0012673A1 (de) 1978-12-12 1979-12-06 Offsetdruckplatte verwendbar als eine Einmetallplatte mit einer druckenden Oberflächenschicht und diese Platte verwendendes Offsetdruckverfahren

Country Status (3)

Country Link
EP (1) EP0012673A1 (de)
BR (1) BR7908088A (de)
CA (1) CA1132840A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998055310A1 (en) * 1997-06-03 1998-12-10 Agfa-Gevaert Naamloze Vennootschap Heat sensitive plate precursor
WO1998055311A1 (en) * 1997-06-03 1998-12-10 Agfa-Gevaert Naamloze Vennootschap Heat sensitive printing plate precursors
WO1998055332A1 (en) * 1997-06-03 1998-12-10 Agfa-Gevaert Naamloze Vennootschap Method of making lithographic printing plates

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL77123C (de) * 1900-01-01
DE556711C (de) * 1930-03-05 1932-08-13 Johannes May Metallene Druckplatte mit einem Cadmium-UEberzug
FR1253949A (fr) * 1960-01-07 1961-02-17 Nobel Bozel Plaques polymétalliques pour l'impression offset
FR1511174A (fr) * 1965-12-22 1968-01-26 Podniky Polygrafickeho Priemys Procédé pour la fabrication de plaques d'impression en offset à plusieurs couches ainsi que plaques conformes à celles ainsi obtenues
FR2069924A1 (en) * 1969-12-05 1971-09-10 Hasek Josef Photolithographic plate - with reactive anticorrosion layer
FR2232195A5 (en) * 1973-05-30 1974-12-27 Schafler Armando Planographic printing plate for use with negative transparency - having long life, capable of accurate dot structure that produces high fidelity printing with good reprodn

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL77123C (de) * 1900-01-01
DE556711C (de) * 1930-03-05 1932-08-13 Johannes May Metallene Druckplatte mit einem Cadmium-UEberzug
FR1253949A (fr) * 1960-01-07 1961-02-17 Nobel Bozel Plaques polymétalliques pour l'impression offset
FR1511174A (fr) * 1965-12-22 1968-01-26 Podniky Polygrafickeho Priemys Procédé pour la fabrication de plaques d'impression en offset à plusieurs couches ainsi que plaques conformes à celles ainsi obtenues
FR2069924A1 (en) * 1969-12-05 1971-09-10 Hasek Josef Photolithographic plate - with reactive anticorrosion layer
FR2232195A5 (en) * 1973-05-30 1974-12-27 Schafler Armando Planographic printing plate for use with negative transparency - having long life, capable of accurate dot structure that produces high fidelity printing with good reprodn

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998055310A1 (en) * 1997-06-03 1998-12-10 Agfa-Gevaert Naamloze Vennootschap Heat sensitive plate precursor
WO1998055311A1 (en) * 1997-06-03 1998-12-10 Agfa-Gevaert Naamloze Vennootschap Heat sensitive printing plate precursors
WO1998055332A1 (en) * 1997-06-03 1998-12-10 Agfa-Gevaert Naamloze Vennootschap Method of making lithographic printing plates
US6268110B1 (en) * 1997-06-03 2001-07-31 Agfa-Gevaert Heat sensitive plate precursor

Also Published As

Publication number Publication date
CA1132840A (en) 1982-10-05
BR7908088A (pt) 1980-07-22

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