GB157216A - Improvements in photomechanical printing processes - Google Patents
Improvements in photomechanical printing processesInfo
- Publication number
- GB157216A GB157216A GB109021A GB109021A GB157216A GB 157216 A GB157216 A GB 157216A GB 109021 A GB109021 A GB 109021A GB 109021 A GB109021 A GB 109021A GB 157216 A GB157216 A GB 157216A
- Authority
- GB
- United Kingdom
- Prior art keywords
- printing
- forms
- exposed
- under
- over
- 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)
- Printing Methods (AREA)
Abstract
157,216. K³hn, H., and Hanfstaengl, F., [Firm of]. Nov. 13, 1915, [Convention date]. Photo-mechanical printing-surfaces.-To enable photographic copies to be made of any object with accurate reproduction of the gradations of tonevalues both as to light and shade two printing forms or layers are used, one being over exposed and the other under exposed, these two being complementary to each other in furnishing a print with all shades in their true values. Theprinciple is applicable for single or multi-colored light printing or for oil or bromide-oil reprinting with a plurality of forms. The forms for printing may be obtained from the same negative by printing with different durations. Where large contrasts between high lights and shades exist two negatives face to face may be exposed simultaneously separated by thin filter to get under and over exposed negatives. Diapositives from these may be used for printing an enlarged negative from which the printing forms for use are made by over and under printing. Reference has been directed by the Comptroller to Specification 13103/84.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE157216X | 1915-11-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB157216A true GB157216A (en) | 1922-04-10 |
Family
ID=5678438
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB109021A Expired GB157216A (en) | 1915-11-13 | 1921-01-08 | Improvements in photomechanical printing processes |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB157216A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5302924A (en) * | 1991-06-25 | 1994-04-12 | Lk-Products Oy | Temperature compensated dielectric filter |
-
1921
- 1921-01-08 GB GB109021A patent/GB157216A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5302924A (en) * | 1991-06-25 | 1994-04-12 | Lk-Products Oy | Temperature compensated dielectric filter |
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