GB1330955A - Lithographic printing plates - Google Patents

Lithographic printing plates

Info

Publication number
GB1330955A
GB1330955A GB430771A GB1330955DA GB1330955A GB 1330955 A GB1330955 A GB 1330955A GB 430771 A GB430771 A GB 430771A GB 1330955D A GB1330955D A GB 1330955DA GB 1330955 A GB1330955 A GB 1330955A
Authority
GB
United Kingdom
Prior art keywords
water
sheet
layer
solution
polyvinyl alcohol
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
Application number
GB430771A
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.)
Howson Algraphy Ltd
Original Assignee
Howson Algraphy Ltd
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
Application filed by Howson Algraphy Ltd filed Critical Howson Algraphy Ltd
Publication of GB1330955A publication Critical patent/GB1330955A/en
Expired 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
    • B41N3/00—Preparing for use and conserving printing surfaces
    • B41N3/03—Chemical or electrical pretreatment
    • B41N3/036—Chemical or electrical pretreatment characterised by the presence of a polymeric hydrophilic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1008—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials
    • B41C1/1016—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials characterised by structural details, e.g. protective layers, backcoat layers or several imaging layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C2201/00—Location, type or constituents of the non-imaging layers in lithographic printing formes
    • B41C2201/04—Intermediate layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
    • B41C2210/02—Positive working, i.e. the exposed (imaged) areas are removed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
    • B41C2210/08—Developable by water or the fountain solution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
    • B41C2210/24—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation characterised by a macromolecular compound or binder obtained by reactions involving carbon-to-carbon unsaturated bonds, e.g. acrylics, vinyl polymers

Landscapes

  • Printing Plates And Materials Therefor (AREA)

Abstract

1330955 Printing plate HOWSON-ALGRAPHY Ltd 2 Feb 1972 [9 Feb 1971] 4307/71 Heading B6C [Also in Divisions B2 G2] A sheet suitable for use in the production of a lithographic printing plate comprises a sheet of aluminium or aluminium alloy having an anodic layer formed thereon, the layer being impregnated with a composition comprising water-soluble polyvinyl alcohol and a further water-soluble colloid. The coating may comprise 1-20 parts by weight of polyvinyl alcohol per 20-1 parts by weight of the further water-soluble colloid. Said other colloid may be gum arabic, a carboxymethyl cellulose salt, e.g. the sodium salt, or dextrin. Additional materials such as a wetting agent and/or a colourant and/or a preservative may be present in the coating solution. The sheets are suitable for use both in the water-developed "deep etch" reversal process of plate making and in the acid-developed water wash and/or organic solvent wash deep etch reversal process. In a typical example an electrochemically grained and anodized aluminium sheet was washed and then immersed in a bath containing 60 grams gum arabic lumps, 60 grams polyvinyl alcohol in 8 litres water to impregnate the anodized surface. The sheet was then dried and coated with a dichromate light-sensitized layer of gum arabic, placed in contact with a line and dot structured photographic film positive transparency, and exposed to the light from a single phase open carbon electric arc. The exposed plate was then developed with an aqueous solution of calcium and zinc chlorides and the areas of the sheet thereby revealed were deep etched using a solution containing zinc chloride and hydrochloric acid. After cleaning and drying the etched areas were coated with a thin film of vinyl-based lacquer and when the lacquer was dry it was inked with a layer of black-pigmented greasy "inking in solution". The inked plate was then immersed in clean water, drained and flooded with a 2% solution of sulphuric acid to loosen the stencil constituted by the light struck areas of the lightsensitized coating. The stencil was then scrubbed off. The printing plate was completed by washing and applying a thin layer of gum arabie.
GB430771A 1971-02-09 1971-02-09 Lithographic printing plates Expired GB1330955A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB430771 1971-02-09

Publications (1)

Publication Number Publication Date
GB1330955A true GB1330955A (en) 1973-09-19

Family

ID=9774705

Family Applications (1)

Application Number Title Priority Date Filing Date
GB430771A Expired GB1330955A (en) 1971-02-09 1971-02-09 Lithographic printing plates

Country Status (12)

Country Link
AT (1) AT316595B (en)
AU (1) AU457147B2 (en)
BE (1) BE779135A (en)
DE (1) DE2205706A1 (en)
DK (1) DK130822B (en)
ES (1) ES399978A1 (en)
FR (1) FR2126800A5 (en)
GB (1) GB1330955A (en)
IT (1) IT949035B (en)
NL (1) NL7201629A (en)
SE (1) SE393955B (en)
ZA (1) ZA72737B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2341566A (en) * 1998-09-18 2000-03-22 Lexmark Int Inc Treating aluminum substrates

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4201450C1 (en) * 1992-01-21 1993-08-19 Danfoss A/S, Nordborg, Dk
CN107236919A (en) * 2017-06-28 2017-10-10 华杰 A kind of hot dipping plating assistant agent and its application

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2341566A (en) * 1998-09-18 2000-03-22 Lexmark Int Inc Treating aluminum substrates
US6410197B1 (en) 1998-09-18 2002-06-25 Lexmark International, Inc. Methods for treating aluminum substrates and products thereof
GB2341566B (en) * 1998-09-18 2002-09-18 Lexmark Int Inc Forming a photoconductor having a treated aluminium substrate

Also Published As

Publication number Publication date
DE2205706A1 (en) 1972-08-24
BE779135A (en) 1972-05-30
AT316595B (en) 1974-07-25
NL7201629A (en) 1972-08-11
ES399978A1 (en) 1975-04-16
AU457147B2 (en) 1975-01-16
DK130822B (en) 1975-04-21
SE393955B (en) 1977-05-31
FR2126800A5 (en) 1972-10-06
AU3880572A (en) 1973-08-16
ZA72737B (en) 1972-10-25
IT949035B (en) 1973-06-11
DK130822C (en) 1975-09-29

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Legal Events

Date Code Title Description
PS Patent sealed
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee