GB438805A - Improvements in or relating to the production of photographic diazotype prints - Google Patents

Improvements in or relating to the production of photographic diazotype prints

Info

Publication number
GB438805A
GB438805A GB1556336A GB1556336A GB438805A GB 438805 A GB438805 A GB 438805A GB 1556336 A GB1556336 A GB 1556336A GB 1556336 A GB1556336 A GB 1556336A GB 438805 A GB438805 A GB 438805A
Authority
GB
United Kingdom
Prior art keywords
paper
phloroglucinol
borax
starch
amino
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
Application number
GB1556336A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
S C & P Harding Ltd
Original Assignee
S C & P Harding Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by S C & P Harding Ltd filed Critical S C & P Harding Ltd
Priority to GB1556336A priority Critical patent/GB438805A/en
Publication of GB438805A publication Critical patent/GB438805A/en
Expired legal-status Critical Current

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
    • G03C1/00—Photosensitive materials
    • G03C1/52—Compositions containing diazo compounds as photosensitive substances

Abstract

438,805. Photographic diazotype layers. LEUCH, W. P., and HARDING, Ltd., S. C. & P., Denmark Hill, London. May 24, 1934, No. 15563. [Class 98 (ii)] Diazotype papers are produced by coating a paper or cloth with a diazo compound, drying, and dusting over with a coupling component. An alkaline substance may be included with the coupling component. Development is effected by water or a solution of mild alkali such as sodium carbonate, borax, or disodium phosphate. A salt for preventing bleeding may be included in the developer. Moist ammonia gas with or without heat may also be used for development or the paper may be applied to a layer of gelatin containing developing substances. Examples of suitable papers are (1) paper coated with the stannic chloride double salt of 1-ethyl-amino-2-methyl- 4-diazobenzene chloride, aluminium sulphate, tartaric acid, and ammonium chloride and dusted over with a powder of phloroglucinol, sodium benzoate, and starch, and (2) paper coated with diazotized p-amino-diphenylamine sulphate, aluminium sulphate, and ammonium chloride dusted over with a powder of phloroglucinol, disodium phosphate, borax and starch. Specification 427,962 is referred to.
GB1556336A 1934-05-24 1934-05-24 Improvements in or relating to the production of photographic diazotype prints Expired GB438805A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1556336A GB438805A (en) 1934-05-24 1934-05-24 Improvements in or relating to the production of photographic diazotype prints

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1556334 1934-05-24
GB1556336A GB438805A (en) 1934-05-24 1934-05-24 Improvements in or relating to the production of photographic diazotype prints

Publications (1)

Publication Number Publication Date
GB438805A true GB438805A (en) 1935-11-25

Family

ID=26251388

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1556336A Expired GB438805A (en) 1934-05-24 1934-05-24 Improvements in or relating to the production of photographic diazotype prints

Country Status (1)

Country Link
GB (1) GB438805A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE873041C (en) * 1938-03-23 1953-04-09 Renker Belipa G M B H Process for the semi-dry development of two-component diazotype layers
DE888804C (en) * 1941-07-01 1953-09-03 Kalle & Co Ag Process to increase the water resistance of diazotypes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE873041C (en) * 1938-03-23 1953-04-09 Renker Belipa G M B H Process for the semi-dry development of two-component diazotype layers
DE888804C (en) * 1941-07-01 1953-09-03 Kalle & Co Ag Process to increase the water resistance of diazotypes

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