GB433586A - Method of obtaining photographic contrasts by means of naphthalene diazonium compounds - Google Patents
Method of obtaining photographic contrasts by means of naphthalene diazonium compoundsInfo
- Publication number
- GB433586A GB433586A GB30120/34A GB3012034A GB433586A GB 433586 A GB433586 A GB 433586A GB 30120/34 A GB30120/34 A GB 30120/34A GB 3012034 A GB3012034 A GB 3012034A GB 433586 A GB433586 A GB 433586A
- Authority
- GB
- United Kingdom
- Prior art keywords
- exposure
- paper
- self
- development
- naphthalene
- 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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/20—Bridges, shoes, throats, or other devices for withholding dirt, foam, or batch
-
- 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
- G03C1/00—Photosensitive materials
- G03C1/52—Compositions containing diazo compounds as photosensitive substances
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Organic Chemistry (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Paper (AREA)
- Heat Sensitive Colour Forming Recording (AREA)
Abstract
433,586. Photographic sensitive materials. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, Emmasingel, Eindhoven, Holland. Oct. 20, 1934, No. 30120. Convention date, Dec. 27, 1933. Drawings to Specification. [Class 98 (ii)] Layers sensitized with naphthalene diazonium compounds and having an acidity or alkalinity such that no colouring matter is formed during exposure, are exposed under an original and self-development effected by the action of water only is allowed to take place. The self-development may be accelerated by heating or by an increase in the moisture content of the layer. A white background is obtained if the layer has a degree of moisture less than 1 per cent during the exposure, this being attained by drying over phosphorus pentoxide or in a stream of dry gas. In an example, the paper is soaked in a solution of diazo-2-hydroxy - naphthalene-4-sulpho-acid and anhydrous soda and dried in air. After exposure the paper is allowed to develop in the dark or developed by smoothing it under a moistened cloth at 100‹ C. The paper may be intensely dried before use. The soda may be replaced by sodium borate, sodium phosphate or sodium selenite. To obtain a negative from a positive, a short exposure may be given and, after self-development in the exposed parts has taken place, a second exposure which causes complete decomposition in the unexposed parts. Specification 391,970 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE433586X | 1933-12-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB433586A true GB433586A (en) | 1935-08-16 |
Family
ID=6500632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30120/34A Expired GB433586A (en) | 1933-12-27 | 1934-10-20 | Method of obtaining photographic contrasts by means of naphthalene diazonium compounds |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2106868A (en) |
| BE (1) | BE407017A (en) |
| FR (1) | FR783321A (en) |
| GB (1) | GB433586A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE470580A (en) * | 1946-01-18 | |||
| NL70689C (en) * | 1946-01-21 | |||
| US4094681A (en) * | 1975-10-23 | 1978-06-13 | Trans World Technology Laboratories, Inc. | Image amplification of negative-working diazo materials |
-
0
- BE BE407017D patent/BE407017A/xx unknown
-
1934
- 1934-10-20 GB GB30120/34A patent/GB433586A/en not_active Expired
- 1934-12-19 US US758332A patent/US2106868A/en not_active Expired - Lifetime
- 1934-12-26 FR FR783321D patent/FR783321A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2106868A (en) | 1938-02-01 |
| FR783321A (en) | 1935-07-11 |
| BE407017A (en) |
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