GB1195837A - Method of Producing Photographic Images - Google Patents

Method of Producing Photographic Images

Info

Publication number
GB1195837A
GB1195837A GB47631/66A GB4763166A GB1195837A GB 1195837 A GB1195837 A GB 1195837A GB 47631/66 A GB47631/66 A GB 47631/66A GB 4763166 A GB4763166 A GB 4763166A GB 1195837 A GB1195837 A GB 1195837A
Authority
GB
United Kingdom
Prior art keywords
developer
light
image
hydrazine
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.)
Expired
Application number
GB47631/66A
Inventor
Gerald Laurens Vanreusel
Camille Angelina Vand Eputte
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.)
Agfa Gevaert NV
Original Assignee
Agfa Gevaert 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 Agfa Gevaert NV filed Critical Agfa Gevaert NV
Priority to GB47633/66A priority Critical patent/GB1195838A/en
Priority to GB47631/66A priority patent/GB1195837A/en
Priority to NL6713674A priority patent/NL6713674A/xx
Priority to BE704930D priority patent/BE704930A/xx
Priority to DE1597490A priority patent/DE1597490C2/en
Priority to FR125367A priority patent/FR1541559A/en
Priority to FR126065A priority patent/FR1541985A/en
Priority to US677763A priority patent/US3565620A/en
Priority to DE1597493A priority patent/DE1597493C2/en
Publication of GB1195837A publication Critical patent/GB1195837A/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
    • G03C5/50—Reversal development; Contact processes
    • 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
    • G03C1/485—Direct positive emulsions
    • G03C1/48538—Direct positive emulsions non-prefogged, i.e. fogged after imagewise exposure
    • G03C1/48546—Direct positive emulsions non-prefogged, i.e. fogged after imagewise exposure characterised by the nucleating/fogging agent
    • G03C1/48553—Direct positive emulsions non-prefogged, i.e. fogged after imagewise exposure characterised by the nucleating/fogging agent the fogging agent only present in the developer

Abstract

1,195,837. Photographic direct positive images. GEVAERT-AGFA N.V. Oct.6, 1967 [Oct. 24, 1966], No. 47631/66. Heading G2C. A photographic direct positive image is produced by exposing a light-sensitive material having an internal-latent-image silver halide emulsion and developing with an energetic surface developer in the presence of a substance or substances which liberate iodide ions and/or bromide ions in aqueous media and in the presence of hydrazine or a hydrazine salt, the hydrazine or salt thereof being present in the developer and/or in a processing liquid with which the lightsensitive material may be wetted before development. The substances liberating iodide and/or bromide ions may be present in the developer or in the emulsion or another layer of the lightsensitive material and may be incorporated therein by inhibition before or after the exposure step. The substances include molecular iodine and addition products thereof, organic quaternary ammonium, phosphonium, sulphonium and iodonium iodides and chloroiodates, inorganic watersoluble iodides and bromides and monobromoacetic acid. The surface developer is a silver halide developer containing no effective amount of a silver halide solvent and is energetic by reason of its high pH, elevated temperature, high concentration, the absence of restrainers such as potassium bromide and/or the presence of activators such as cyclohexylamine, phenylhydrazine or polyethylene glycols or derivatives thereof. The developing agent may be partially or completely incorporated into the light-sensitive material and the developer may therefore comprise an alkaline aqueous activating solution free from developing agent. Developing agents mentioned are hydroquinone mixtures with metal or 1-phenyl-3-pyrazolidinone but a colour developer may be used in the presence of a colour coupler to give, after silver bleaching, a positive colour image, and the process may be used in multicolour materials. Development may be conducted while overall exposing the material to light. The internal latent image emulsion is not or only slightly chemically ripened. An anti-foggant may be present in the light-sensitive material, possibly in more than anti-foggant amounts.
GB47631/66A 1966-10-24 1966-10-24 Method of Producing Photographic Images Expired GB1195837A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
GB47633/66A GB1195838A (en) 1966-10-24 1966-10-24 A Method of Producing Photographic Images
GB47631/66A GB1195837A (en) 1966-10-24 1966-10-24 Method of Producing Photographic Images
NL6713674A NL6713674A (en) 1966-10-24 1967-10-08
BE704930D BE704930A (en) 1966-10-24 1967-10-11
DE1597490A DE1597490C2 (en) 1966-10-24 1967-10-21 Process for the preparation of a direct positive photographic image
FR125367A FR1541559A (en) 1966-10-24 1967-10-23 New process for forming direct positive photographic images
FR126065A FR1541985A (en) 1966-10-24 1967-10-23 Photographic processing liquids and methods for forming photographic images
US677763A US3565620A (en) 1966-10-24 1967-10-24 Photographic processing liquids and method of producing photographic images
DE1597493A DE1597493C2 (en) 1966-10-24 1967-10-24 Process for the preparation of a direct positive photographic image

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB47633/66A GB1195838A (en) 1966-10-24 1966-10-24 A Method of Producing Photographic Images
GB47631/66A GB1195837A (en) 1966-10-24 1966-10-24 Method of Producing Photographic Images

Publications (1)

Publication Number Publication Date
GB1195837A true GB1195837A (en) 1970-06-24

Family

ID=26266101

Family Applications (2)

Application Number Title Priority Date Filing Date
GB47631/66A Expired GB1195837A (en) 1966-10-24 1966-10-24 Method of Producing Photographic Images
GB47633/66A Expired GB1195838A (en) 1966-10-24 1966-10-24 A Method of Producing Photographic Images

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB47633/66A Expired GB1195838A (en) 1966-10-24 1966-10-24 A Method of Producing Photographic Images

Country Status (5)

Country Link
US (1) US3565620A (en)
BE (1) BE704930A (en)
DE (2) DE1597490C2 (en)
GB (2) GB1195837A (en)
NL (1) NL6713674A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0416174A1 (en) * 1989-09-04 1991-03-13 Agfa-Gevaert N.V. Method of developing direct positive silver halide material
EP0468104A1 (en) * 1990-07-27 1992-01-29 Agfa-Gevaert N.V. Light-sensitive silver halide material for making direct-positive images

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2719371A1 (en) * 1977-04-30 1978-11-02 Agfa Gevaert Ag PHOTOGRAPHIC REVERSAL PROCEDURE
JPH0756565B2 (en) * 1986-06-25 1995-06-14 富士写真フイルム株式会社 Direct positive image forming method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2410690A (en) * 1943-08-26 1946-11-05 Eastman Kodak Co Method of improving the sensitivity characteristics of emulsions
BE502879A (en) * 1950-04-29

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0416174A1 (en) * 1989-09-04 1991-03-13 Agfa-Gevaert N.V. Method of developing direct positive silver halide material
EP0468104A1 (en) * 1990-07-27 1992-01-29 Agfa-Gevaert N.V. Light-sensitive silver halide material for making direct-positive images

Also Published As

Publication number Publication date
NL6713674A (en) 1967-12-27
DE1597493A1 (en) 1970-05-14
DE1597493C2 (en) 1983-08-25
BE704930A (en) 1968-04-11
DE1597490C2 (en) 1983-09-01
DE1597490A1 (en) 1970-06-04
US3565620A (en) 1971-02-23
GB1195838A (en) 1970-06-24

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PLNP Patent lapsed through nonpayment of renewal fees