EP0028180A1 - Offsetdruckplatten mit einer wasserführenden Schicht aus einer Zinn-Kupfer-Legierung, insbesondere einer Speculum-Legierung - Google Patents

Offsetdruckplatten mit einer wasserführenden Schicht aus einer Zinn-Kupfer-Legierung, insbesondere einer Speculum-Legierung Download PDF

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Publication number
EP0028180A1
EP0028180A1 EP80401461A EP80401461A EP0028180A1 EP 0028180 A1 EP0028180 A1 EP 0028180A1 EP 80401461 A EP80401461 A EP 80401461A EP 80401461 A EP80401461 A EP 80401461A EP 0028180 A1 EP0028180 A1 EP 0028180A1
Authority
EP
European Patent Office
Prior art keywords
layer
tin
speculum
aquaphile
couche
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Withdrawn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
EP80401461A
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 FR7925605A external-priority patent/FR2467087A1/fr
Priority claimed from FR7928622A external-priority patent/FR2470009A1/fr
Application filed by Individual filed Critical Individual
Publication of EP0028180A1 publication Critical patent/EP0028180A1/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Withdrawn legal-status Critical Current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 new offset plates comprising, as aquaphile layer, a tin-copper alloy and more particularly speculum.
  • the present invention relates to offset plates having a steel support and an aquaphile surface based on tin making it possible to resolve all or part of the difficulties encountered to date in this use of tin.
  • the speculum is a known alloy which is based on copper and tin and which, according to the authors, can comprise approximately 60 to 55% of copper and approximately 40 to 45% of tin.
  • This alloy has been mainly used to date to produce surfaces of various objects in which hardness was used surface, unalterability and also the appearance of the product (i.e. its color).
  • the present invention therefore relates to offset plates having an aquaphile surface based on a tin-copper alloy comprising from 40 to 90% by weight of tin and from 10 to 60% by weight of copper and more especially offset plates with a speculum surface.
  • the aquaphile surfaces according to the invention are tin-copper bimetallic surfaces, they may comprise a third constituent chosen from zinc, cobalt, nickel and cadmium. This third compound is present in relatively small amounts, less than 20%, and preferably less than 5%.
  • the speculum layer deposited on a suitable support, will be covered by known means with an aquaphile metallic layer (for example chrome or tin-nickel) and said aquaphile layer will itself be coated.
  • an aquaphile metallic layer for example chrome or tin-nickel
  • a layer of an encrophilic metal and / or a layer of photosensitive resin for example chrome or tin-nickel
  • the aquaphile alloys according to the invention can be deposited and cling firmly on numerous surfaces
  • tinplate c ' that is, iron (or steel) whose surface has been covered with a very thin layer of tin or a tin-based alloy.
  • tin iron
  • Such a material (tin) is commonly used in particular in the canning industry.
  • Example 1 Speculum deposit.
  • each anode is supplied with a particular circuit which is for copper from 2 to 3 volts with an amperage of 0 A , 62 per dm 2 and for the tin circuit from 3 to 5 volts with an amperage of 1 A , 8 amps by dm 2 .
  • the deposition rate of the speculum under these conditions is approximately 3 microns in 5 minutes.
  • the speculum is covered with approximately 1.8 micron with a sensitive printing layer (layer PR12 from the company PCAS) on a spinner rotating at approximately 80 rpm.
  • the layer is dried for 5 min in hot air and then in an oven.
  • the plate After insolation, the plate is developed with the developer corresponding to the sensitive layer used. The soluble parts are eliminated thus exposing parts of the speculum. After rinsing the excess water is removed with a squeegee and a 3% solution of phosphoric acid is spread over the plate for 2 minutes. Then, after rinsing and drying, the plate is erased.
  • plates A, B, C, D and E it is possible, in plates A, B, C, D and E, to replace the steel support with a support in stainless steel or in tinplate (that is to say steel covered with a thin layer of tin) or by an aluminum support suitably treated such as, for example, tinning.
  • hydrophilic layer chromium
  • another hydrophilic metallic layer such as, for example, a tin-nickel layer.
  • the thicknesses of the speculum layer can be very variable depending on the conditions (support, function of the speculum layer, etc.); we can thus, in the case of layer intermediate in particular, having layers as thin as 0.005 microns and having layers up to 5 microns thick beyond which there is no appreciable gain in properties.
  • the surface obtained is perfectly hydrophilic and encrophobic and the plate can be used as an offset plate (after coating with a suitable photosensitive layer).
  • steel plates were coated with tin-copper bimetallic compounds.
  • the hardness of the layer obtained was measured on the one hand and the hydrophilic nature (+) of said layer on the other hand.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Chemically Coating (AREA)
EP80401461A 1979-10-15 1980-10-13 Offsetdruckplatten mit einer wasserführenden Schicht aus einer Zinn-Kupfer-Legierung, insbesondere einer Speculum-Legierung Withdrawn EP0028180A1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR7925605 1979-10-15
FR7925605A FR2467087A1 (fr) 1979-10-15 1979-10-15 Plaques offset comportant une couche de speculum
FR7928622 1979-11-20
FR7928622A FR2470009A1 (fr) 1979-11-20 1979-11-20 Plaques offset a surface aquaphile a base d'etain

Publications (1)

Publication Number Publication Date
EP0028180A1 true EP0028180A1 (de) 1981-05-06

Family

ID=26221392

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80401461A Withdrawn EP0028180A1 (de) 1979-10-15 1980-10-13 Offsetdruckplatten mit einer wasserführenden Schicht aus einer Zinn-Kupfer-Legierung, insbesondere einer Speculum-Legierung

Country Status (1)

Country Link
EP (1) EP0028180A1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE243663C (de) *
NL58534C (de) * 1900-01-01
FR498598A (fr) * 1919-04-24 1920-01-15 Mumford Ltd Ag Perfectionnements apportés à la fabrication des alliages métalliques et à leur emploi
DE1965231A1 (de) * 1969-02-19 1970-09-10 Svu Materialu Druckmesssondenanordnung fuer verdichtetes Material
FR2098784A5 (en) * 1970-07-28 1972-03-10 Kodak Pathe Lithographic plate prepn - by treatment of copper plate with ferrocyanide ions
FR2417795A1 (fr) * 1978-02-15 1979-09-14 Rhone Poulenc Graphic Nouveau support de plaques lithographiques et procede de mise en oeuvre

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE243663C (de) *
NL58534C (de) * 1900-01-01
FR498598A (fr) * 1919-04-24 1920-01-15 Mumford Ltd Ag Perfectionnements apportés à la fabrication des alliages métalliques et à leur emploi
DE1965231A1 (de) * 1969-02-19 1970-09-10 Svu Materialu Druckmesssondenanordnung fuer verdichtetes Material
FR2098784A5 (en) * 1970-07-28 1972-03-10 Kodak Pathe Lithographic plate prepn - by treatment of copper plate with ferrocyanide ions
FR2417795A1 (fr) * 1978-02-15 1979-09-14 Rhone Poulenc Graphic Nouveau support de plaques lithographiques et procede de mise en oeuvre

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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