US3183087A - Color reversal development process utilizing a preliminary development bath free of bromide ions - Google Patents

Color reversal development process utilizing a preliminary development bath free of bromide ions Download PDF

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Publication number
US3183087A
US3183087A US180823A US18082362A US3183087A US 3183087 A US3183087 A US 3183087A US 180823 A US180823 A US 180823A US 18082362 A US18082362 A US 18082362A US 3183087 A US3183087 A US 3183087A
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United States
Prior art keywords
developer
color
development
developing
photographic material
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Expired - Lifetime
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US180823A
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English (en)
Inventor
Lohmer Karl
Morcher Bernhard
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Agfa Gevaert NV
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Agfa AG
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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
    • 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
    • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
    • G03C7/407—Development processes or agents therefor

Definitions

  • This invention relates to an improved reversal development process according to which an exposed multicolor photographic reversal film is subjected to a preliminary treatment in a developing bath that is free from bromides before being finally developed in a bromidecontaining developing bath.
  • grittiness Another obstacle in the way of producing a direct positive multi-color print on a paper support by the reversal development process is the so-called grittiness.
  • non-uniform development which produces the impression of a greatly exag gerated coarseness of grain.
  • This grittiness is caused largely in the biack-and-white development.
  • the alkalinity, the nature and concentration of silver halide solvents and the development time are responsible for these effects.
  • the objects of the invention can be attained by treating the exposed multicolor reversal film firstly in a preliminary bath free from bromide ions and developing finally in a developer containing bromide.
  • the preliminary bath advantageously only contains the developer compound and has a pH-value lower than 7.
  • Example A multi-color material which is intended for the production of direct positive multi-color images from color transparencies is prepared as follows:
  • a silver halide gelatin emulsion layer containing the yellow coupler Ta 521 which is Z-(methyloctalecylamino)-4-carboxyalpha-anisoylacetanilide.
  • the silver halide consists of 98.5% of silver bromide and 1.5% of silver iodide.
  • the layer contains 0.7 g. of silver per m.
  • This layer is overcoated with a second silver halide gelatin emulsion layer containing the sodium salt of the magenta coupler Z 169.
  • the magenta coupler Z 169 which is l-(3-sulfo-4-phenoxyphenyl)-3-heptadecyl-S-pyrazolone that is sensitized for the green range of the visible spectrum with the sensitizing dyestufi Rr 340 which is the thiocyanate of 3,3-diethyl-9- ethyl-5,5-diphenyloxacarbocyanine.
  • the silver halide of this layer consists of 90% of silver chloride and 10% of silverbromide.
  • the silver content of both layers is equivalent to 1.0 g. per m.
  • a silver halide emulsion layer consisting of the same silver halide emulsion but being sensitized for the red range of the visible spectrum with the sensitizing dyestutf MA 1088 which is the iodide of 3'-ethyl-tetrahydro-alpha-naphthm thiazole meso phenylethyl rhodanine L 3 ethyl 4,5- diphenylthiazole complex dimethine merocyanine.
  • This layer contains the cyan coupler F 654 which is the sodium salt of N [2 (N -methyl-N-heptadecylamino)-4-sulfophenyl]-l-hydroxy-2-naphthamide.
  • the multilayer material contains 1.3 g. of silver per m.
  • Sample (a) is developed to black-and-white in a developer having the following composition:
  • the material is treated in a stop bath, rinsed, bleach-fixed, rinsed again and dried.
  • the resulting wedge shows satisfactory whites and deep blacks, but has a gamma-value of 1.7. Such a gammavalue is however too steep for the reproduction of transparency images.
  • Sample (b) was developed in a developer of the following composition and thereafter processed in the usual manner as described in connection with sample (a) hereinbefore:
  • the photographic materials used may comprise transparent or matt supports, e.'g., sheets of cellulose esters, polycar-bonates, particularly those produced from bis-phenylolalkanes, polyesters, e.g., polyethylene terephthalate, or paper.
  • transparent or matt supports e.'g., sheets of cellulose esters, polycar-bonates, particularly those produced from bis-phenylolalkanes, polyesters, e.g., polyethylene terephthalate, or paper.
  • the layer arrangement of the multi color material is not especially critical and may be selected according to the special requirements of the reproduction process in which the material is to be used.
  • the developing process according to the invention can be used for developing separate color photographic layers as well as black-and-white positives.
  • the preliminary bath and the developing bath preferably contain the same developing compound.
  • Preferred developers are 1-phenyl-3-pyrazolidone and derivatives thereof, alone or in combination with glycine. In principle however, other developers or developer combinations can also be employed, for example, hydroquinone, p-aminophenol and derivatives thereof, diaminophenol, developers of the 4-amino-pyrazolone(5) or the 3-amino- A -pyrazoline series and the like.
  • the developing concentration is 1-10 g. per liter of the aqueous preliminary bath.
  • the preliminary bath can contain other conventional additives, such as anti-fogging agents, stabilizers, additines for adjusting the pH-value, which has to be about 7 or below, for example, alkali-metal bisulfa-tes or wetting agents.
  • Suitable stabilizers or preserving agents are, for example, alkali-metal suifites, bisulfites or mctabisulfites, and ascorbic acid.
  • the black-and-white developer may also contain conventional additives such as alkalizing agents, e.g., alkalimetal carbonates, borates, phosphates or hydroxides, preserving agents as described above, stabilizing agents, potassium bromide, etc.
  • alkalizing agents e.g., alkalimetal carbonates, borates, phosphates or hydroxides, preserving agents as described above, stabilizing agents, potassium bromide, etc.
  • the improvement which comprises subjecting the image- Wise exposed photographic material (a) prior to development (b) to preliminary treatment in an aqueous developer composition that is free from bromide ions, has a pH below about 7.0, and contains between 1 and 10 grams per liter of a developer of the group consisting of blackand-white developers of the 1-phenyl-3-pyrazolidone, hydroquinone, p-aminophenol, diaminophenol, 4-amino-5- pyrazoline and 3-amino-A -pyrazoline types.
  • aqueous developer composition that is free from bromide ions contains a preserving agent of the class consisting of alkali-metal sulphites, alkali-metal bisulphites and alkalimetal metabisulfites.
  • blackand-white developer is a mixture of 1-phenyl-3-pyrazolidone with glycine.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
US180823A 1961-03-27 1962-03-19 Color reversal development process utilizing a preliminary development bath free of bromide ions Expired - Lifetime US3183087A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA37063A DE1133979B (de) 1961-03-27 1961-03-27 Verfahren zur Herstellung direkt positiver photographischer Bilder, insbesondere farbentwickelter mehrfarbiger photographischer Bilder, nach dem Umkehrentwicklungsverfahren

Publications (1)

Publication Number Publication Date
US3183087A true US3183087A (en) 1965-05-11

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US180823A Expired - Lifetime US3183087A (en) 1961-03-27 1962-03-19 Color reversal development process utilizing a preliminary development bath free of bromide ions

Country Status (5)

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US (1) US3183087A (is")
BE (1) BE615613A (is")
CH (1) CH418130A (is")
DE (1) DE1133979B (is")
GB (1) GB978516A (is")

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4172723A (en) * 1977-07-20 1979-10-30 De Luxe General, Incorporated Auxiliary developer processing

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1525766A (en) * 1922-07-12 1925-02-10 Eastman Kodak Co Color photography
US1973466A (en) * 1931-08-07 1934-09-11 Eastman Kodak Co Photographic developing solutions
US2196036A (en) * 1938-03-31 1940-04-02 Gen Aniline & Film Corp Subtractive process for color photography
US2324123A (en) * 1941-07-08 1943-07-13 Eastman Kodak Co Fog inhibitor for photographic developers
US2456956A (en) * 1942-02-09 1948-12-21 Eastman Kodak Co Photographic processes and lightsensitive elements therefor
US2622025A (en) * 1947-04-03 1952-12-16 Ilford Ltd Light-sensitive photographic element and process using it
US2712995A (en) * 1949-07-04 1955-07-12 Agfa Ag Process for the direct production of positive photographic images

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1525766A (en) * 1922-07-12 1925-02-10 Eastman Kodak Co Color photography
US1973466A (en) * 1931-08-07 1934-09-11 Eastman Kodak Co Photographic developing solutions
US2196036A (en) * 1938-03-31 1940-04-02 Gen Aniline & Film Corp Subtractive process for color photography
US2324123A (en) * 1941-07-08 1943-07-13 Eastman Kodak Co Fog inhibitor for photographic developers
US2456956A (en) * 1942-02-09 1948-12-21 Eastman Kodak Co Photographic processes and lightsensitive elements therefor
US2622025A (en) * 1947-04-03 1952-12-16 Ilford Ltd Light-sensitive photographic element and process using it
US2712995A (en) * 1949-07-04 1955-07-12 Agfa Ag Process for the direct production of positive photographic images

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4172723A (en) * 1977-07-20 1979-10-30 De Luxe General, Incorporated Auxiliary developer processing

Also Published As

Publication number Publication date
CH418130A (de) 1966-07-31
GB978516A (is")
DE1133979B (de) 1962-07-26
BE615613A (is")

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