GB844000A - Improvements relating to photographic printing - Google Patents
Improvements relating to photographic printingInfo
- Publication number
- GB844000A GB844000A GB18995/58A GB1899558A GB844000A GB 844000 A GB844000 A GB 844000A GB 18995/58 A GB18995/58 A GB 18995/58A GB 1899558 A GB1899558 A GB 1899558A GB 844000 A GB844000 A GB 844000A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transparency
- infra
- onto
- red radiation
- light
- 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
- G03C5/02—Sensitometric processes, e.g. determining sensitivity, colour sensitivity, gradation, graininess, density; Making sensitometric wedges
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Printing Methods (AREA)
Abstract
844,000. Photographic printing processes. LOGETRONICS Inc. June 13, 1958 [June 17, 1957], No. 18995/58. Class 98(2). The contrast during printing is reduced by directing infra-red radiation from a source 28 through the transparency 20 to be printed and onto a uniform fluorescent source 16 so as to quench the actinic light therefrom imagewise, and then directing the unquenched light through the transparency and onto the light-sensitive printing surface 24. As shown in Fig. 1, the infra-red radiation is directed towards the source 16 by a beam splitter 34 and a lens 22, and the unquenched light is focussed onto the printing sheet 24 by the lens 22 and passes through the beam splitter 34. In another embodiment, the beam splitter is omitted and the infra-red radiation is directed obliquely onto the transparency. In an embodiment for making contact prints, the infra-red radiation is directed through the back of the printing sheet which is in contact with the transparency which in turn is in contact with the fluorescent source.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US844000XA | 1957-06-17 | 1957-06-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB844000A true GB844000A (en) | 1960-08-10 |
Family
ID=22184725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18995/58A Expired GB844000A (en) | 1957-06-17 | 1958-06-13 | Improvements relating to photographic printing |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB844000A (en) |
-
1958
- 1958-06-13 GB GB18995/58A patent/GB844000A/en not_active Expired
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