GB447390A - Improved method of and means for producing copies by reflectography - Google Patents
Improved method of and means for producing copies by reflectographyInfo
- Publication number
- GB447390A GB447390A GB2319734A GB2319734A GB447390A GB 447390 A GB447390 A GB 447390A GB 2319734 A GB2319734 A GB 2319734A GB 2319734 A GB2319734 A GB 2319734A GB 447390 A GB447390 A GB 447390A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sensitive layer
- light
- dividing screen
- sensitized
- circular cylinder
- 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
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/08—Photoprinting; Processes and means for preventing photoprinting
- G03C5/10—Reflex-printing; Photoprinting using fluorescent or phosphorescent means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Printing Methods (AREA)
Abstract
447,390. Reproducing opaque originals by contact printing. N A A M L O O Z E VENNOOTSCHAP CHEMISCHE FABRIEK L. VAN DER GRINTEN. Venlo, Limburg, Holland. Aug. 10, 1934, No. 23197. Void [Abridged as open to inspection under Sect. 91 of the Acts, Feb. 12, 1935]. Drawings to Specification. [Class 98 (ii)] In the reproduction of opaque originals by reflex contact printing, the light is passed before its passage through the sensitive layer through a. dividing screen which subdivides it into small beams of greater actinic intensity separated by regions of less actinic intensity and the sensitive layer is so adjusted with respect to the dividing screen so as to make the intersection space of the beams of greater actinic intensity with the sensitive layer relatively small. A lenticular dividing screen with a high ratio between the focal length of the lenses and the thickness of the sensitive layer may be employed. A punctiform, linear, or band like source of light may be used. The system to be illuminated may have the form of a circular cylinder, or may be moved in the surface of a circular cylinder in the axis of which the source of light is located. The sensitive material may comprise transparent foil, such as celluloid, sensitized on both sides or through the entire mass with paradiazodiphenylamine, which is developed with an alkaline solution of an azo coupling component, or may be sensitized with fine-grained silver bromide emulsion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2319734A GB447390A (en) | 1934-08-10 | 1934-08-10 | Improved method of and means for producing copies by reflectography |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2319734A GB447390A (en) | 1934-08-10 | 1934-08-10 | Improved method of and means for producing copies by reflectography |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB447390A true GB447390A (en) | 1935-02-12 |
Family
ID=10191722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2319734A Expired GB447390A (en) | 1934-08-10 | 1934-08-10 | Improved method of and means for producing copies by reflectography |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB447390A (en) |
-
1934
- 1934-08-10 GB GB2319734A patent/GB447390A/en not_active Expired
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