US2186852A - Photographic silver halide emulsions - Google Patents

Photographic silver halide emulsions Download PDF

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Publication number
US2186852A
US2186852A US176058A US17605837A US2186852A US 2186852 A US2186852 A US 2186852A US 176058 A US176058 A US 176058A US 17605837 A US17605837 A US 17605837A US 2186852 A US2186852 A US 2186852A
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US
United States
Prior art keywords
silver halide
dyestufl
color
acid
silver
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 - Lifetime
Application number
US176058A
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English (en)
Inventor
Wilmanns Gustav
Bitterfeld Kreis
Schneider Wilhelm
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.)
GAF Chemicals Corp
Original Assignee
Agfa Ansco Corp
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 Ansco Corp filed Critical Agfa Ansco Corp
Application granted granted Critical
Publication of US2186852A publication Critical patent/US2186852A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • G03C7/32—Colour coupling substances
    • G03C7/3212—Couplers characterised by a group not in coupling site, e.g. ballast group, as far as the coupling rest is not specific

Definitions

  • This invention has for an object to provide a layers containing a dyestufl component made fast to diffusion by the introduction into its molecule of a radical according to this invention.
  • the present invention is based on a process in which especially useful dyestuil formers last todiflusion are obtained by introducing as a substituent into a dyestufl component a compound or derivative of thecyclic menthane group.
  • Dyestufl components into which these groups may be introduced are for example aand 18- hydroxynaphthoic acids, 2.3-hydroxyanthracene ,carboxylic acid, salicylic acid, hydroxy-fiuorene carboxylic acid, 2.3-hydi'oxycarbazole carboxylic acid, a-naphthol aldehyde, 'aminophenyl methyl pyrazolone, aromatic amines, aminonaphthols.
  • aminonaphthol carboxylic acids aminonaphthol sulfonic acids, aminophenols, aminobenzoyl acetic acid ester arylides, aminonaphthoyl acetic acid ester arylides, acylacetic acid ester amino- I 'arylides.
  • the dyestufl components used in the invention may be added to the emulsion'at any point ofits production.
  • the silver halide emulsions thus obtained are especially suitable for the purpose of color photography and may be made into layers in known manner, being applied superimposed on each other on one or both sides of a support. They may be sensitized for various regions' of the spectrum. Emulsions may be applied, however, in another manner, for example the several sensitized emulsions having the different dyestufl formers may be brought on to the support in the form of small particles.
  • the emulsion layers used in the invention may be combined with other layers in which the color picture is produced by a different process, for example by mordant dyeing or by toning. Furthermore, the
  • emulsion layers of the invention may be combined with other layers which contain other dyestufl formers fast to diffusion as described in the U. S. Patent applications cited hereunder.
  • the colored pictures may be produced in varioils manners, for example bythe processes of U. S. Patents 2,179,228; 2,179,238; 2,179,244 and 2,178,612 and U. S. applications Ser. No. 94,340, filed August 5, 1936, Ser. No. 141,093 filed May 6, 1937, Ser. No. 159,518 filed August 17, '1937, Ser. No. 164,499 filed September 18, 1937 and Ser. No. 171,705 filed October 29, 1937.
  • a diazo compound such as a carbonic acid solution of tetrazotized benzidine disulfonic acid.
  • azotate silver picture and may be subsequently immersed in a dilute acid solution, whereby a yellow picture is produced consisting of the amdyestuif para camphoryl-aminobenzoyl-acetylaniline-4carboxylic acid azo-p-naphthalene.
  • the film is then treated with a silver bleaching out bath, i. e. that described in British Patent 401,340 to produce the dye image.
  • a silver bleaching out bath i. e. that described in British Patent 401,340 to produce the dye image.
  • the exposed emulsion layers may be-developecl by a simple color forming development or by a reversal development as described in U. 53. Patent 2,179,234.
  • the picture may be produced in multi-layer material, each layer containing one of said dyestufl components, by exposing the material, developing to black and white, in for instance Amidol, dissolving silver from the negative so produced by bleaching in for example a chromic acid bath, forming images in the remaining silver halide, developing in a developer such as is, used above, iorming silver halideimages .by treatment in a bleaching bath, 1. e.
  • the exposed emulsiom may be developed in a solution 0! para-aminodimethyl-aniline. alkaline with sodium carbonate, in which case a In the produc-,
  • the dyestufi' former fast to diffusion thus obtained is added to a silver halide emulsion which is then converted for example with the aid or'the' silver antidiazotate process into a picture the color of which varies with the antidiazotate se lected. For instance, if the antidiazotate is made from dianisidine there is obtained a'blue violet picture. When the anti-diazotate used is from para-nitraniline pictures of red tints are obtained.
  • the condensation product has the following formula aiiii obtained.
  • this dyestufl former is chiefly suitable for producing yellow tints.
  • a silver halide emulsion for color photography containing a dyestufi component fast to diffusion, said dyestuff component being capable of forming a dye with the oxidation product of a developer and containing inits molecule a radical having substantially the chemical structure of a saturated bicyclic terpene having a dimethyl ture of a saturated bicyclic terpene having a dimethyl substituted carbon atom as the bridge common to the rings, and another radical capable of preventing diffusion of said dyestufl component.
  • a silver halide emulsion for color photography containing a dyestuff component fast to diflusion, said dyestufl component being capable of forming a dye with the oxidation product of a developer and containing in its molecule a molecule a radical having substantially the chemical structure of a saturated bicyclic terpene having a dimethyl substituted carbon atom as the bridge common to the rings.
  • a silver halide emulsion for color photography containing a dyestu'ff component fast to diffusion, said dyestuif component being capable of forming a dye with the oxldationproductof of forming a dye with the oxidation product of V a developer, and containing in its molecule .an
  • a developer and containing in its molecule a radical having substantially the chemical structure of a saturated bicycfic terpene having a dimethyl substituted carbona'tom as the bridge common to the rings, said terpene radical being linked to the dyestuif forming radical by means of an acid amide linking;
  • a silver halide emulsion for color photography containing a dyestuif component fast to diffusion, said dyestuif component being capable acid radical substituted by an amine of a saturated bicyclic terpene having a dimethyl substituted carbon atom as the bridge common to the rings.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
US176058A 1936-12-18 1937-11-23 Photographic silver halide emulsions Expired - Lifetime US2186852A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI0056651 1936-12-18

Publications (1)

Publication Number Publication Date
US2186852A true US2186852A (en) 1940-01-09

Family

ID=7194405

Family Applications (1)

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US176058A Expired - Lifetime US2186852A (en) 1936-12-18 1937-11-23 Photographic silver halide emulsions

Country Status (3)

Country Link
US (1) US2186852A (enrdf_load_stackoverflow)
BE (1) BE425269A (enrdf_load_stackoverflow)
FR (1) FR830926A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2712995A (en) * 1949-07-04 1955-07-12 Agfa Ag Process for the direct production of positive photographic images

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE759642C (de) * 1941-07-01 1952-10-27 Ig Farbenindustrie Ag Verfahren zur Herstellung von photographischen Farbenbildern

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2712995A (en) * 1949-07-04 1955-07-12 Agfa Ag Process for the direct production of positive photographic images

Also Published As

Publication number Publication date
BE425269A (enrdf_load_stackoverflow)
FR830926A (fr) 1938-08-12

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