FR2344874A1 - Low contrast developer for high contrast silver halide emulsion - with (micro)fine grains contains pyrazolidone, hydroquinone, metol etc. - Google Patents

Low contrast developer for high contrast silver halide emulsion - with (micro)fine grains contains pyrazolidone, hydroquinone, metol etc.

Info

Publication number
FR2344874A1
FR2344874A1 FR7707281A FR7707281A FR2344874A1 FR 2344874 A1 FR2344874 A1 FR 2344874A1 FR 7707281 A FR7707281 A FR 7707281A FR 7707281 A FR7707281 A FR 7707281A FR 2344874 A1 FR2344874 A1 FR 2344874A1
Authority
FR
France
Prior art keywords
pyrazolidone
hydroquinone
metol
micro
silver halide
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.)
Withdrawn
Application number
FR7707281A
Other languages
French (fr)
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.)
ANNEMAN WILLIAM
Original Assignee
ANNEMAN WILLIAM
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
Priority claimed from US05/759,986 external-priority patent/US4083722A/en
Application filed by ANNEMAN WILLIAM filed Critical ANNEMAN WILLIAM
Publication of FR2344874A1 publication Critical patent/FR2344874A1/en
Withdrawn legal-status Critical Current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
    • G03C5/30—Developers
    • G03C5/3021—Developers with oxydisable hydroxyl or amine groups linked to an aromatic ring

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

Photographic developer contains 3-pyrazolidone(s) (I), hydroxybenzene(s) (II), p-methylamino-phenol (III) or its acid salt, alkaline preservative(s) (IV) and accelerator(s) (V). The (I)/(II) wt. ratio pref. is 3-8:1. The pref. compsn. is 1-2/l (I), 0.25-1.5g l (II) 0.25-4g/l (III) sulphate, 20-40g/l (IV) and 0.25-2g/l1 (V). Pref. (I) is 1-phenyl-3-pyrazolidone (Ia), (II) is hydroquinone (IIa) and (V) is borax. The developer gives negatives of normal contrast from high contrast films.
FR7707281A 1976-03-15 1977-03-11 Low contrast developer for high contrast silver halide emulsion - with (micro)fine grains contains pyrazolidone, hydroquinone, metol etc. Withdrawn FR2344874A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US66657476A 1976-03-15 1976-03-15
US05/759,986 US4083722A (en) 1976-03-15 1977-01-17 Developer composition and process for developing photographic film

Publications (1)

Publication Number Publication Date
FR2344874A1 true FR2344874A1 (en) 1977-10-14

Family

ID=27099488

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7707281A Withdrawn FR2344874A1 (en) 1976-03-15 1977-03-11 Low contrast developer for high contrast silver halide emulsion - with (micro)fine grains contains pyrazolidone, hydroquinone, metol etc.

Country Status (3)

Country Link
JP (1) JPS52131721A (en)
DE (1) DE2710803A1 (en)
FR (1) FR2344874A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2289367A (en) * 1940-07-10 1942-07-14 Llford Ltd Photographic developer
US3865591A (en) * 1973-05-10 1975-02-11 Delaware Photographic Products General purpose developer
US3867151A (en) * 1973-05-10 1975-02-18 Delaware Photographic Products General purpose monobath

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2289367A (en) * 1940-07-10 1942-07-14 Llford Ltd Photographic developer
US3865591A (en) * 1973-05-10 1975-02-11 Delaware Photographic Products General purpose developer
US3867151A (en) * 1973-05-10 1975-02-18 Delaware Photographic Products General purpose monobath

Also Published As

Publication number Publication date
JPS52131721A (en) 1977-11-04
DE2710803A1 (en) 1977-09-29

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Legal Events

Date Code Title Description
ST Notification of lapse