GB1129366A - Lithographic plates and method of making such plates - Google Patents
Lithographic plates and method of making such platesInfo
- Publication number
- GB1129366A GB1129366A GB38810/65A GB3881065A GB1129366A GB 1129366 A GB1129366 A GB 1129366A GB 38810/65 A GB38810/65 A GB 38810/65A GB 3881065 A GB3881065 A GB 3881065A GB 1129366 A GB1129366 A GB 1129366A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- hydrophilic
- oleophilic
- silver
- image
- 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
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G13/00—Electrographic processes using a charge pattern
- G03G13/26—Electrographic processes using a charge pattern for the production of printing plates for non-xerographic printing processes
- G03G13/28—Planographic printing plates
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Printing Plates And Materials Therefor (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
Abstract
1,129,366. Photographic processes for producing lithographic plates. MINNESOTA MINING & MFG. CO. Sept.21, 1965 [Sept. 21, 1964], No.38810/65. Headings G2C and G2M. An image-receiving material capable of conversion to a lithographic plate comprises a backing having an oleophilic surface coated a liquid permeable hydrophilic layer containing a reduction promoter and this layer becoming friable and removable on reduction of metal ions to the metal; premature reduction of metal ions being prevented by either (i) limiting the reduction promoter to the oelophilic/hydrophilic interface and leaving the upper part of hydrophilic layer free of reduction promoter or (ii) adding a humectant such as glycerin to the layer. Lithographic plates are produced by selectively permeating a metal salt through a hydrophilic layer containing reduction nuclei, the hydrophilic layer being coated on an oleophilic surface of a backing, chemically reducing the salt to its metal at least at the hydrophilic/oleophilic interface, bleaching to remove the metal image and then removing the hydrophilic layer in the areas of formation of the metal image. The oleophilic backing is generally a paper support coated with an oleophilic layer. Selective permeation is achieved by using an imagewise exposed silver halide emulsion which is either coated on, or contacted with the hydrophilic layer reduction being achieved by the silver salt diffusion transfer process. In the examples, a paper support coated with a polyethylene or polypropylene layer or a polyester support is coated with an oleophilic layer of a vinyl chloride/vinyl acetate copolymer contaning titanium dioxide and overcoated with a hydrophilic silica layer containing colloidal silver. The silica layer either contains a humectant such as glycerine or is overcoated with a further silica layer not containing colloida silver so that the silver salt is precipitated at the oleophilic/hydrophilic interface. A silver halide emulsion may be coated on top of the silica layer and the material imagewise exposed and developed to produce a positive silver image at the interface by the diffusion transfer process or an exposed silver halide emulsion may be placed on top of the silica layer to produce a positive silver image at the interface development. The emulsion layer is removed where necessary and the positive silver image bleached out. Silica is now removed by rubbing and washing from the areas which contained the positive image to leave a lithographic plate; the bond between silica and the oleophilic layer being weakened by the formation of the silver image.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US397986A US3914125A (en) | 1964-09-21 | 1964-09-21 | Diffusion transfer element and method of using same |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1129366A true GB1129366A (en) | 1968-10-02 |
Family
ID=23573507
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB27986/68A Expired GB1133856A (en) | 1964-09-21 | 1965-09-21 | Method of making lithographic sheets and sheets made thereby |
GB38810/65A Expired GB1129366A (en) | 1964-09-21 | 1965-09-21 | Lithographic plates and method of making such plates |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB27986/68A Expired GB1133856A (en) | 1964-09-21 | 1965-09-21 | Method of making lithographic sheets and sheets made thereby |
Country Status (5)
Country | Link |
---|---|
US (1) | US3914125A (en) |
BE (1) | BE669880A (en) |
DE (1) | DE1447968C3 (en) |
FR (1) | FR1459918A (en) |
GB (2) | GB1133856A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2209123A1 (en) * | 1972-12-04 | 1974-06-28 | Minnesota Mining & Mfg |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4038077A (en) * | 1974-04-04 | 1977-07-26 | Polaroid Corporation | Process comprising diffusion transfer silver image removal |
DE2813495A1 (en) * | 1977-03-28 | 1978-10-05 | Minnesota Mining & Mfg | PHOTOLITHOGRAPHIC RECEIVING SHEET |
US4293625A (en) * | 1977-03-28 | 1981-10-06 | Minnesota Mining And Manufacturing Company | Anchor layer in photolithographic receptor base contains oxide surface treated titanium dioxide |
GB2304628B (en) * | 1995-09-07 | 1998-09-23 | Kodak Ltd | Printing plate product |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2774667A (en) * | 1951-07-02 | 1956-12-18 | Polaroid Corp | Photographic silver halide transfer process |
BE544850A (en) * | 1955-02-07 | |||
BE622712A (en) * | 1961-09-22 | |||
US3245784A (en) * | 1961-10-16 | 1966-04-12 | Minnesota Mining & Mfg | Lithographic master and process of preparation |
US3385701A (en) * | 1964-11-09 | 1968-05-28 | Dick Co Ab | Lithographic offset master and method |
-
1964
- 1964-09-21 US US397986A patent/US3914125A/en not_active Expired - Lifetime
-
1965
- 1965-09-20 FR FR31907A patent/FR1459918A/en not_active Expired
- 1965-09-21 GB GB27986/68A patent/GB1133856A/en not_active Expired
- 1965-09-21 DE DE1447968A patent/DE1447968C3/en not_active Expired
- 1965-09-21 GB GB38810/65A patent/GB1129366A/en not_active Expired
- 1965-09-21 BE BE669880D patent/BE669880A/xx not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2209123A1 (en) * | 1972-12-04 | 1974-06-28 | Minnesota Mining & Mfg |
Also Published As
Publication number | Publication date |
---|---|
DE1447968B2 (en) | 1974-04-11 |
US3914125A (en) | 1975-10-21 |
DE1447968A1 (en) | 1968-11-14 |
DE1447968C3 (en) | 1974-11-07 |
BE669880A (en) | 1966-03-21 |
GB1133856A (en) | 1968-11-20 |
FR1459918A (en) | 1966-06-17 |
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