GB415399A - Improvements relating to photo-mechanical printing processes - Google Patents
Improvements relating to photo-mechanical printing processesInfo
- Publication number
- GB415399A GB415399A GB5072/33A GB507233A GB415399A GB 415399 A GB415399 A GB 415399A GB 5072/33 A GB5072/33 A GB 5072/33A GB 507233 A GB507233 A GB 507233A GB 415399 A GB415399 A GB 415399A
- Authority
- GB
- United Kingdom
- Prior art keywords
- warm
- bath
- image
- photographs
- gelatine
- 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
- G03F5/00—Screening processes; Screens therefor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
- Printing Methods (AREA)
Abstract
415,399. Producing photomechanical printing surfaces; photographs. ECKARDT, E. E., 39, Bayreuther Strasse, Dresden, Germany. Feb. 18, 1933, No. 5072. Convention date, Jan. 16. [Class 98 (ii).] Photographs or negatives giving the appearance of an etching or engraving are produced by subjecting a gelatine silver halide layer after exposure, development and fixing, to treatment in a warm water bath which tends to soften the gelatine, the softening process being continued until the silver image particles coalesce to form a reticulated or ' skeletonized ' pattern, as illustrated. The skeletonized image may be used for the production of photomechanical printing surfaces, e.g. it may form an etching resist or may be used directly for collotype &c. ; alternatively, it may be utilized for printing on to a chromate layer in which case the image is reddened by a uranium toning bath. The Specification describes a number of modified methods. Thus the plate or film may be subjected to a warm developing bath or a warm fixing bath ; to alternate warm and cold water baths ; to a very rapid developer ; to a warm oil bath ; or to a bath of potassium ferrocyanide, with or without alternating warm and cold baths. The silver image may be intensified, e.g. with mercury. Reference is also made to the use of silver halide emulsion containing starch, chalk or like translucent materials.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE415399X | 1933-01-16 | ||
US698671A US2071821A (en) | 1931-04-18 | 1933-11-18 | Photographic image bearer and method of making same |
US126933A US2130735A (en) | 1933-01-16 | 1937-02-20 | Method of producing a printing plate |
Publications (1)
Publication Number | Publication Date |
---|---|
GB415399A true GB415399A (en) | 1934-08-20 |
Family
ID=32045516
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5072/33A Expired GB415399A (en) | 1933-01-16 | 1933-02-18 | Improvements relating to photo-mechanical printing processes |
Country Status (5)
Country | Link |
---|---|
US (1) | US2130735A (en) |
BE (1) | BE394468A (en) |
DK (1) | DK51780C (en) |
FR (1) | FR751051A (en) |
GB (1) | GB415399A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2977228A (en) * | 1957-12-20 | 1961-03-28 | Sperry Rand Corp | Method of making three dimensional models |
US3655381A (en) * | 1969-04-24 | 1972-04-11 | Eastman Kodak Co | Process for the production of integrally formed, random dot photographic images |
ES474589A1 (en) * | 1977-10-28 | 1979-10-16 | Bates As Ab | Process for making color separation negatives and positives for use in multi-color printing |
CA1327889C (en) * | 1988-03-01 | 1994-03-22 | Henning Joergensen | Trap |
FR2722584B1 (en) * | 1994-07-13 | 1996-10-31 | Nouel Jean Marie | USE OF FREQUENCY MODULATED SCREENING TO LIGHTEN PRINTER SURFACES IN OFFSET |
-
0
- BE BE394468D patent/BE394468A/xx unknown
-
1933
- 1933-02-17 DK DK51780D patent/DK51780C/en active
- 1933-02-17 FR FR751051D patent/FR751051A/en not_active Expired
- 1933-02-18 GB GB5072/33A patent/GB415399A/en not_active Expired
-
1937
- 1937-02-20 US US126933A patent/US2130735A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR751051A (en) | 1933-08-26 |
US2130735A (en) | 1938-09-20 |
DK51780C (en) | 1936-06-22 |
BE394468A (en) |
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