GB825866A - Method of making a lithographic printing plate suitable for lithographic printing and hardening solution therefor - Google Patents
Method of making a lithographic printing plate suitable for lithographic printing and hardening solution thereforInfo
- Publication number
- GB825866A GB825866A GB32226/56A GB3222656A GB825866A GB 825866 A GB825866 A GB 825866A GB 32226/56 A GB32226/56 A GB 32226/56A GB 3222656 A GB3222656 A GB 3222656A GB 825866 A GB825866 A GB 825866A
- Authority
- GB
- United Kingdom
- Prior art keywords
- emulsion
- unhardened
- lithographic printing
- layer
- transfer
- 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
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/06—Silver salts
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
Abstract
825,866. Photolithographic printing surfaces. KODAK Ltd. Oct. 23, 1956 [Oct. 25, 1955], No. 32226/56. Class 98(2) An unhardened gelatino-silver halide layer is imagewise exposed, treated to form a hardened gelatine image therein and then to transfer in the presence of moisture at least a thin stratum of the unexposed unhardened parts of the emulsion layer to a support bearing a layer having a hydrophilic surface, and the transferred emulsion is thereafter treated with a solution containing tannic acid and thiourea. The treating solution may contain sodium bisulphate. and other ingredients such as ascorbic acid, aluminium chloride, potassium bichromate, hydrochloric acid and chromium chloride. The hydrophilic surface may be given an alkaline wash before transfer of the emulsion parts thereto to prevent frilling and subsequent unsatisfactory, offset press results. Melamine-formaldehyde sized paper stock coated with gelatine-baryta containing a hardening agent such as formaldehyde or aluminium chloride, or pigmented-casein paper which may be over-coated with sodium alginate and then located as with a cuprammonium solution or zinc acetate may be used to form such surface. Exposure, processing and transfer of the unhardened emulsion may be by the methods of Specifications 655,274 and 725,667 wherein the original unhardened gelatino-silver halide layer may be one containing a tanning developing agent or this together with a non-tanning developing agent and the exposure is effected to a line or halftone image. Three examples are provided. Specification 726,543 also is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US542782A US2794388A (en) | 1955-10-25 | 1955-10-25 | Method of preparing a lithographic printing plate |
Publications (1)
Publication Number | Publication Date |
---|---|
GB825866A true GB825866A (en) | 1959-12-23 |
Family
ID=24165258
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB32226/56A Expired GB825866A (en) | 1955-10-25 | 1956-10-23 | Method of making a lithographic printing plate suitable for lithographic printing and hardening solution therefor |
Country Status (4)
Country | Link |
---|---|
US (1) | US2794388A (en) |
BE (1) | BE551933A (en) |
FR (1) | FR1158449A (en) |
GB (1) | GB825866A (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE567153A (en) * | 1957-04-26 | |||
BE582225A (en) * | 1958-09-02 | |||
NL247939A (en) * | 1959-02-04 | |||
BE590925A (en) * | 1959-05-20 | |||
US3095808A (en) * | 1960-07-28 | 1963-07-02 | Eastman Kodak Co | Photoconductolithography employing rubeanates |
US3091531A (en) * | 1961-02-23 | 1963-05-28 | Eastman Kodak Co | Hardening gelatin-silver halide lithographic offset printing plates |
US3394653A (en) * | 1965-10-12 | 1968-07-30 | Robert E. Riesberg | Novel method of cleaning paper planographic plates |
-
0
- BE BE551933D patent/BE551933A/xx unknown
-
1955
- 1955-10-25 US US542782A patent/US2794388A/en not_active Expired - Lifetime
-
1956
- 1956-10-22 FR FR1158449D patent/FR1158449A/en not_active Expired
- 1956-10-23 GB GB32226/56A patent/GB825866A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR1158449A (en) | 1958-06-13 |
US2794388A (en) | 1957-06-04 |
BE551933A (en) |
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