FR2414743A1 - Black=and=white silver halide photographic prod. - contg. ballasted reducing agent and developable with basic activator - Google Patents

Black=and=white silver halide photographic prod. - contg. ballasted reducing agent and developable with basic activator

Info

Publication number
FR2414743A1
FR2414743A1 FR7800627A FR7800627A FR2414743A1 FR 2414743 A1 FR2414743 A1 FR 2414743A1 FR 7800627 A FR7800627 A FR 7800627A FR 7800627 A FR7800627 A FR 7800627A FR 2414743 A1 FR2414743 A1 FR 2414743A1
Authority
FR
France
Prior art keywords
developer
prod
reducing agent
photographic
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.)
Pending
Application number
FR7800627A
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.)
Kodak Pathe SA
Original Assignee
Kodak Pathe SA
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 Kodak Pathe SA filed Critical Kodak Pathe SA
Priority to FR7800627A priority Critical patent/FR2414743A1/en
Publication of FR2414743A1 publication Critical patent/FR2414743A1/en
Pending 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
    • G03C5/315—Tanning development
    • 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
    • G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
    • G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
    • G03C1/42—Developers or their precursors

Abstract

An Ag halide photographic prod. which can be developed by a basic activator contains (1) an Ag halide developer, in its free form or as its precursor, in an amt. which is significantly lower than reqd. to reduce the developable Ag halides, and (2) a ballasted reducing agent which is non-diffusible from the layer in which it is incorporated and which partakes in a crossed oxidation reaction with the oxidised developer formed during reduction of the Ag halide to Ag., to thus regenerate the developer in its reduced form; amt. of the ballasted reducing agent is such as to ensure regeneration of the developer to give the reqd. Ag density. The photographic prod. includes radiographic, direct positive and reversal Ag halide emulsion based prods. used in black and white photography. Use of the ballasted reducing agent enables a lower concn. of the developer to be used efficiently. The basic activator does not become rapidly polluted by developers which are released from the photographic prods. Since the developer is incorporated in the photographic prod. itself and not in the basic activator, the latter can be stored for a long time without alteration.
FR7800627A 1978-01-11 1978-01-11 Black=and=white silver halide photographic prod. - contg. ballasted reducing agent and developable with basic activator Pending FR2414743A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7800627A FR2414743A1 (en) 1978-01-11 1978-01-11 Black=and=white silver halide photographic prod. - contg. ballasted reducing agent and developable with basic activator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7800627A FR2414743A1 (en) 1978-01-11 1978-01-11 Black=and=white silver halide photographic prod. - contg. ballasted reducing agent and developable with basic activator

Publications (1)

Publication Number Publication Date
FR2414743A1 true FR2414743A1 (en) 1979-08-10

Family

ID=9203298

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7800627A Pending FR2414743A1 (en) 1978-01-11 1978-01-11 Black=and=white silver halide photographic prod. - contg. ballasted reducing agent and developable with basic activator

Country Status (1)

Country Link
FR (1) FR2414743A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105109A1 (en) * 1982-08-27 1984-04-11 Minnesota Mining And Manufacturing Company Gelatin silver photographic elements for tanning development
FR2721117A1 (en) * 1994-06-09 1995-12-15 Kodak Pathe Process for the preparation of a silver halide photographic emulsion sensitized in the presence of hydroquinone derivatives
US6025118A (en) * 1998-05-12 2000-02-15 Sony Corporation Glassmastering photoresist read after write method and system
US6348294B1 (en) * 1997-06-13 2002-02-19 Sony Corporation Glassmastering photoresist read after write method and system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1101926A (en) * 1953-06-05 1955-10-12 Agfa Ag Process for the development of silver halide emulsions
FR1463899A (en) * 1965-10-01 1966-07-22 Kodak Pathe Process for the preparation of a lithographic plate and photographic product for the implementation of this process
GB1086208A (en) * 1963-11-06 1967-10-04 Eastman Kodak Co Colour photographic reproduction processes and materials therefor
FR2215640A1 (en) * 1973-01-30 1974-08-23 Eastman Kodak Co

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1101926A (en) * 1953-06-05 1955-10-12 Agfa Ag Process for the development of silver halide emulsions
GB1086208A (en) * 1963-11-06 1967-10-04 Eastman Kodak Co Colour photographic reproduction processes and materials therefor
FR1463899A (en) * 1965-10-01 1966-07-22 Kodak Pathe Process for the preparation of a lithographic plate and photographic product for the implementation of this process
FR2215640A1 (en) * 1973-01-30 1974-08-23 Eastman Kodak Co

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/71 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105109A1 (en) * 1982-08-27 1984-04-11 Minnesota Mining And Manufacturing Company Gelatin silver photographic elements for tanning development
FR2721117A1 (en) * 1994-06-09 1995-12-15 Kodak Pathe Process for the preparation of a silver halide photographic emulsion sensitized in the presence of hydroquinone derivatives
EP0689091A1 (en) * 1994-06-09 1995-12-27 Kodak-Pathe Process for preparing a silver halide photographic emulsion sensitised in the presence of hydroquinone derivatives
US6348294B1 (en) * 1997-06-13 2002-02-19 Sony Corporation Glassmastering photoresist read after write method and system
US6025118A (en) * 1998-05-12 2000-02-15 Sony Corporation Glassmastering photoresist read after write method and system

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