GB524592A - Method of developing silver chloride papers - Google Patents

Method of developing silver chloride papers

Info

Publication number
GB524592A
GB524592A GB343939A GB343939A GB524592A GB 524592 A GB524592 A GB 524592A GB 343939 A GB343939 A GB 343939A GB 343939 A GB343939 A GB 343939A GB 524592 A GB524592 A GB 524592A
Authority
GB
United Kingdom
Prior art keywords
hexamethylenetetramine
silver chloride
papers
developer
pyrogallol
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
GB343939A
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.)
Gevaert Photo Producten NV
Original Assignee
Gevaert Photo Producten NV
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 Gevaert Photo Producten NV filed Critical Gevaert Photo Producten NV
Publication of GB524592A publication Critical patent/GB524592A/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
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/29—Development processes or agents therefor
    • G03C5/305—Additives other than developers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

524,592. Developing silver-chloride emulsion layers. GEVAERT PHOTO-PRODUCTEN N.V. Feb. 1, 1939, No. 3439. Convention date, Feb. 5, 1938. [Class 98 (ii)] Silver chloride papers are developed in neutral black tones even in the presence of substances tending to give a blue-black effect by the use of a developer to which has been added hexamethylenetetramine or derivatives thereof, other than hexamethylenetetramine derivatives of polyhydroxyphenols and like developing agents, such as the iodomethylate, preferably in the proportion of 1 to 10 grams per litre of developer. A metol-hydroquinone developer to which has been added hexamethylenetetramine or its iodomethylate may be employed to develop to a neutral black gaslight paper and silver chloride paper provided with a protective layer containing nitrobenziminazole, or a metol hydroquinone developer containing both N-hydroxymethylenebenztriazole and hexamethylenetetramine may be used to produce neutral black tones on silver chloride papers. The use of hexamethylenetetramine in developers as a hardening agent and in place of alkali, and of compounds thereof with pyrogallol, pyrogallol monomethyl ether, and methyl pyrogallol monomethyl ether as developing agents is referred to.
GB343939A 1938-02-05 1939-02-01 Method of developing silver chloride papers Expired GB524592A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT82138 1938-02-05

Publications (1)

Publication Number Publication Date
GB524592A true GB524592A (en) 1940-08-09

Family

ID=3500516

Family Applications (1)

Application Number Title Priority Date Filing Date
GB343939A Expired GB524592A (en) 1938-02-05 1939-02-01 Method of developing silver chloride papers

Country Status (2)

Country Link
BE (1) BE432392A (en)
GB (1) GB524592A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63244036A (en) * 1987-03-31 1988-10-11 Konica Corp Photographic stabilizer having good and safe image stabilizing property
EP0507145A1 (en) * 1991-04-03 1992-10-07 Minnesota Mining And Manufacturing Company Alkaline black-and-white developer for silver halide photographic material

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63244036A (en) * 1987-03-31 1988-10-11 Konica Corp Photographic stabilizer having good and safe image stabilizing property
EP0507145A1 (en) * 1991-04-03 1992-10-07 Minnesota Mining And Manufacturing Company Alkaline black-and-white developer for silver halide photographic material
US5478706A (en) * 1991-04-03 1995-12-26 Minnesota Mining And Manufacturing Company Alkaline black-and-white developer for silver halide photographic material

Also Published As

Publication number Publication date
BE432392A (en)

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