GB694580A - Multi-coloured photographic prints - Google Patents
Multi-coloured photographic printsInfo
- Publication number
- GB694580A GB694580A GB2531750A GB2531750A GB694580A GB 694580 A GB694580 A GB 694580A GB 2531750 A GB2531750 A GB 2531750A GB 2531750 A GB2531750 A GB 2531750A GB 694580 A GB694580 A GB 694580A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coupling component
- colour
- paper
- developed
- transparency
- 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
- G03C5/18—Diazo-type processes, e.g. thermal development, or agents therefor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Abstract
694,580. Photographic diazotype process. LAWES BROS., Ltd. Oct. 12, 1951 [Oct. 17, 1950], No. 25317/50. Class 98 (ii). In a printing process of the type wherein material, light-sensitized with a diazo, tetrazo, or other nitrogen-containing compound capable of coupling with a coupling compound to form a coloured compound and releasing nitrogen under light action to form a colourless decomposition product, is exposed under an image-bearing transparency and developed with a solution of a coupling component, a selected unexposed portion or portions of the material is treated with a coupling component or components to produce areas in a required colour or colours, and the whole or the remaining unexposed portion or portions of the material are treated with another coupling component adapted to produce another colour or shade of colour, preferably a dark or unobtrusive colour). The diazo compound may be one which forms a dye with a coupling component in acid or neutral solution, one which requires the application of heat to the print or the use of a heated developer or both, or one which requires the use of an alkaline solution of a coupling component. Light-sensitive paper may be exposed through a transparency carrying a plan or map, and developed, the area of the plan or map to be coloured cut out of the print and registered with the corresponding area of the transparency, and a second light-sensitive paper exposed through the combination. The masked area of the second paper is developed using a coupling component which produces the desired colour, and the whole of the paper is developed with a different coupling component to produce the remaining lines in a different colour. The first paper may have a semi-transparent support to produce only partial masking. The coupling component may be applied by brushing, dabbing, or spraying, or by rollers, and the stencil formed from the first paper by the cutting out of the mask may be used to facilitate the local application of the coupling component. In an example, a paper, film, or cloth support is coated on one or both sides with a diazotype sensitizing composition consisting of an aqueous solution of the zinc chloride double salt of diazotized 1 - amino - 2: 5 - diethoxy - 4 - benzoylaminobenzene, thiourea, citric or tartaric acid, and naphthalene-1: 3: 6-trisulphonic acid. The material is exposed under a transparency and developed to black, blue, brown, or other dark colour, and cut-outs are made corresponding to the selected areas to be coloured and attached to the transparency. Similar diazotype material is exposed under the masked transparency, and these masked areas are treated with a developer comprising an aqueous solution of tartaric (or citric or boric) acid, potassium citrate (or sodium citrate, formate, acetate, or benzoate), and saponin, to which has been added as coupling component 1-phenyl- 3-methyl-5-pyrazolone, resorcinol, acetoacet. anilide, 2: 3 - dihydroxynaphthalene, 2: 7 - dihydroxynaphthalene, or phoroglucinol, or mixtures thereof. The print is then developed in a similar developer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2531750A GB694580A (en) | 1950-10-17 | 1950-10-17 | Multi-coloured photographic prints |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2531750A GB694580A (en) | 1950-10-17 | 1950-10-17 | Multi-coloured photographic prints |
Publications (1)
Publication Number | Publication Date |
---|---|
GB694580A true GB694580A (en) | 1953-07-22 |
Family
ID=10225744
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2531750A Expired GB694580A (en) | 1950-10-17 | 1950-10-17 | Multi-coloured photographic prints |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB694580A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1035474B (en) * | 1951-11-30 | 1958-07-31 | American Optical Corp | Process for the production of multicolor photographic images by applying a polyvinyl alcohol film with diazo compounds and copying on the partial color images |
US3052542A (en) * | 1958-07-24 | 1962-09-04 | Gen Aniline & Film Corp | Intermediate master for use in the diazotype process and a process for producing same |
CN114402060A (en) * | 2019-07-08 | 2022-04-26 | 香港大学 | Compositions and methods for tissue clearing |
-
1950
- 1950-10-17 GB GB2531750A patent/GB694580A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1035474B (en) * | 1951-11-30 | 1958-07-31 | American Optical Corp | Process for the production of multicolor photographic images by applying a polyvinyl alcohol film with diazo compounds and copying on the partial color images |
US3052542A (en) * | 1958-07-24 | 1962-09-04 | Gen Aniline & Film Corp | Intermediate master for use in the diazotype process and a process for producing same |
CN114402060A (en) * | 2019-07-08 | 2022-04-26 | 香港大学 | Compositions and methods for tissue clearing |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB458664A (en) | Improvements in and relating to colour forming developers and processes of colour development | |
US2750292A (en) | Process for producing colored photographic contrasts | |
GB694580A (en) | Multi-coloured photographic prints | |
GB391677A (en) | Manufacture of photographic pictures | |
GB698027A (en) | Photographic light-sensitive diazotype material | |
US2623821A (en) | Photographic development of color on textile and other materials | |
US2552354A (en) | Diazotype layers containing diazos of n-(2-hydroxypropyl)-phenylenediamines | |
GB540760A (en) | Improvements in and relating to colour couplers for photographic colour development | |
GB948661A (en) | Diazotype photoprinting process | |
DE855051C (en) | Photosensitive materials | |
GB628914A (en) | Photoprinting diazotype layers and process of making transition prints | |
GB282894A (en) | Process for obtaining photographic images | |
JPS5331133A (en) | Color photographic developing agent | |
GB496559A (en) | Process for the manufacture of coloured photographic materials | |
GB843713A (en) | Preparation of blue colloidal silver dispersions for photographic antihalo layers | |
US2531004A (en) | Acetonitriles as azo components in diazotypes | |
US1968956A (en) | Colored photographic image and method of producing same | |
US3615487A (en) | Method for the production of diazo-type intermediate originals | |
US3427162A (en) | Diazotype materials and methods for producing diazotype images | |
US2541886A (en) | Aliphatic nitro compounds as azo coupling components | |
GB333668A (en) | Process of producing multi-colour photographs | |
GB347430A (en) | ||
GB239875A (en) | Improvements in photographic printing materials | |
US2194293A (en) | Process of making photographic prints in color | |
GB309166A (en) | A process for dyeing and figuring woven, knitted and plaited fabrics, leather and other fibrous materials |