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
  • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
  • G03C7/28—Silver dye bleach processes; Materials therefor; Preparing or processing such materials
• • 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
  • G03C1/08—Sensitivity-increasing substances
  • G03C1/10—Organic substances
  • G03C1/102—Organic substances dyes other than methine dyes

Definitions

• the object of this invention resides in the production of dyestufl images, which contain blackish or black dyestufis.
• dyestufl images which contain blackish or black dyestufis.
• coloring photographic material with dark or blackish colors as necessary more particularly for the production of single-color or black-andwhitecolor images, a'n extremely long time is required for the exposure.
• sensitization may also be performed in respect of any 85 other gaps which may be present in the absorption range of the dyestuff.
• the sensitizer there is added the dyestuflf Cryptocyanine.
• the emulsion thus prepared is poured on 45 to a desired backing or support (glass, film or paper).
• Example 2 Diamine Black BO (Schultz-Farbstofitabellen 0 1920 edition, page 405) isconverted by means of an organic base into an insoluble, non-difiusing salt, for example by conversion with cinchonine chloride, as described in my Patent No. 2,046,067 dated June 30, 1936. This substance is then 55 added to a silver bromide layer.
• Ea'ample 3 I An insoluble dyestufl, such'as Sudan Black B, is dissolved in alcohol or aceton, and added to the emulsion. Alternately the same may also be admixed with the emulsion in powder form.
• the exposed layers may be treated subsequently according to many different processes.
• Thistreatment may consist, for example, in immersing in a .bath containing means which destroy the dyestufi by oxidation or reduction at the points of the silver deposit or alsoatthe points which are free of deposit, as described in my Patent No. 2,020,775 dated November 12, 1935 and Patent No. 2,004,625 dated'June 11, 1935.
• the subsequent treatment of the layers may also be performed with the assistance of coupled reactions, such as have already been described by Luther and von Holleben, or also by the use of dyestuffdestroying agents in conjunction with images, which'have been preliminarily treated by mordanting or tanning.
• wash-out reliefs by tanning and hardening and subsequent treatment in warm water.
• the images may be employed for the production of direct positives, for I producing duplicate negatives, for the production of master images for photomechanical purposes, for reproducing deed paper, etc.
• Photographic material for the production of dyestufl images comprising a photographic colloid containing silver halide and dyed by means of a dyestuflf which is fast to said colloid, re- 40 sistant to ordinary photographic treating baths and which absorbs substantially all of the visible rays of the spectrum but transmits invisible rays, and a sensltizer sensitizing said colloid in respect 2.
• Photographic material for the production of dyestufi images comprising a photographic colloid containing silver halide and dyed by means of a dyestuff which is fast to said colloid resistant to ordinary photographic treating baths and which absorbs substantially all of the visible rays of the spectrum but transmits infra-red rays and a sensitizer sensitizing said colloid for infra-red rays.
• Photographic material for the production of" dyestuif images comprising a silver halide emulsion dyed by means of Naphthylamine Black 43 and a sensitizer sensitizing said emulsion in respect to infra-red rays.
• Photographic material for the production of dyestuff images comprising a silver halide emulsion dyed with Diamine Black B0 and a sensitizer sensitizing said emulsion in respect; to infra-red rays.
• Photographic material for the production of dyestufi images comprising a silver halide emulsion dyed by means of Sudan Black B and a sensitizer sensitizing said emulsion in respect to infrared rays.
• Photographic material for the production of dyestuff images comprising a colloid containing silver halide and sensitized in respect to infrared rays by means of Cryptocyanlne 8, said colloid being dyed with a dyestufl which is fast thereto and which absorbs substantially the whole of the visible rays of the spectrum, transmits infra-red, and is resistant to ordinary photographic treating baths.
• Photographic material for the production of dyestufi images comprising a photographic colloid containing silver halide and dyed by means of a dyestufi which is fast to said colloid, resistant to ordinary photographic treating baths and which absorbs substantially all of the visible rays ofthe spectrum, absorbing different of said visible light rays in different degree but transmitting invisible rays and a sensitizer sensitizing said colloid in respect to said invisible rays and those light rays for which the absorption of the dyestuif has a minimal value.

Landscapes

• Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• General Physics & Mathematics (AREA)
• Spectroscopy & Molecular Physics (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)
• Photosensitive Polymer And Photoresist Processing (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=7137523

Family Applications (1)

Country Status (3)

Cited By (1)

• 1933
  • 1933-03-23 US US662395A patent/US2074259A/en not_active Expired - Lifetime
  • 1933-03-23 GB GB8848/33A patent/GB418368A/en not_active Expired
  • 1933-03-24 FR FR753079D patent/FR753079A/fr not_active Expired

Also Published As

Similar Documents