GB436043A - An improved photographic printing process and apparatus therefor - Google Patents
An improved photographic printing process and apparatus thereforInfo
- Publication number
- GB436043A GB436043A GB32417/34A GB3241734A GB436043A GB 436043 A GB436043 A GB 436043A GB 32417/34 A GB32417/34 A GB 32417/34A GB 3241734 A GB3241734 A GB 3241734A GB 436043 A GB436043 A GB 436043A
- Authority
- GB
- United Kingdom
- Prior art keywords
- original
- sheet
- transparent sheet
- vacuum holder
- holder
- 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
- G03F3/00—Colour separation; Correction of tonal value
- G03F3/04—Colour separation; Correction of tonal value by photographic means
- G03F3/06—Colour separation; Correction of tonal value by photographic means by masking
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
Abstract
436,043. Photo-mechanical printing- surfaces. COLLINS, R. B., 38, Orchard Close, Bexleyheath, Kent. Nov. 10, 1934, No. 32417. [Classes 98 (i) and 98 (ii)] In a process for producing high-light half-tone negatives the original is mounted in a vacuum holder having a thin flexible transparent sheet covering the original and forming an air excluding cover for the vacuum holder, the transparent sheet is painted black on the parts covering the lightest tones of the original, the holder is fixed to the copying board of the camera with a sheet of plain glass replacing the usual half-tone screen, a high-light exposure is made on the sensitized surface in the dark slide, the paint is removed from the transparent sheet and the sheet of plain glass replaced by the half-tone screen, and a further exposure made on the sensitized surface. As shown, a flexible transparent sheet L is clamped between rubber pads of the lid B to base A by means of clamps D the air is exhausted from the vacuum holder through the hole F. Plates N, N<1> have a series of holes M so that the vacuum holder may be positioned at different angles by engagement with two pins on the copy-board. For obtaining different colours the parts of the original required in colour are painted over in different tones of blacks and greys, and are painted around in white paint. The original is removed and replaced by a sheet of tinted paper, and a negative made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB32417/34A GB436043A (en) | 1934-11-10 | 1934-11-10 | An improved photographic printing process and apparatus therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB32417/34A GB436043A (en) | 1934-11-10 | 1934-11-10 | An improved photographic printing process and apparatus therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB436043A true GB436043A (en) | 1935-10-03 |
Family
ID=10338273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32417/34A Expired GB436043A (en) | 1934-11-10 | 1934-11-10 | An improved photographic printing process and apparatus therefor |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB436043A (en) |
-
1934
- 1934-11-10 GB GB32417/34A patent/GB436043A/en not_active Expired
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