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
  • G03C7/46—Subtractive processes not covered by the group G03C7/26; 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
  • G03C1/66—Compositions containing chromates as photosensitive substances
• • 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
  • G03C11/00—Auxiliary processes in photography
  • G03C11/18—Colouring

Definitions

• This invention relates to a sheet material and method for use in the production of prints and more especially in the production of colored photographic prints.
• Another object of my invention is to provide a material capable of forming and supporting a superior relief image in which exposed portions of the base constitute an integral part of the image representing an extreme of tonal value without unnatural contrast of surface texture or gloss.
• Another object of the invention is to provide a material for producing a relief image on a partially exposed base, the base and the relief image thereon being of different nature, whereby color may be taken up and carried by one which is repelled by the other.
• My above mentioned patent teaches methods of making a photographic relief image on an opaque white support and the method of coloring the relief to give a print in which the density or tone is controlled by the thickness of the photographic relief, i. e., is controlled photographically, and the color is controlled manually.
• the present application teaches primarily an improved embodiment of the invention employing a mat surface between the support and the wash-off relief layer or image. It also relates to two systems alternative to those of my patent for making the required relief image. In one of these systems, a wash-off relief emulsion carried by a transparent base is exposed through the base and the rear surface of the base is provided with an opaque white layer. In the other system, the wash-off relief emulsion is carried permanently by an opaque white base so that the exposure must be from the front and the processing must fasten the required relief image to the support.
• the mat surface produces a foundat on for any surface retouching desired-in the highlights.
• the support must be of a material which repels the dyes used in the sense that it does not absorb them. With prior glossy sunports which met this requirement it was practically impossible to get any color into the highlights or burned out areas which were not covered by the relief. But with the mat surface there is suilicient tooth to permit adherenc of the coloring material without absorption into the base.
• the mat surface solves two problems unique to my process for making manually colored. photographically toned, prints.
• a soluble, light-sensitive, gelatin emulsion coated on a white, opaque, water-resistant Celluloid In order to obtain the desired results I prefer to use a soluble, light-sensitive, gelatin emulsion coated on a white, opaque, water-resistant Celluloid.
• My invention is not limited to these in its broader-aspect as defined by the claims.
• I use the term soluble herein in its loose sense as commonly used in this art to include colloida. dispersion.
• the emulsion has a semi-light-restraining dye incorprated;therein to an extent just sufficient to slightly retard the light as it enters the emulsion, thus confining the full exposure to the upper part of the emulsion layer. The purpose of this is to expedite the reversal of the image as more fully described hereafter.
• the base or support has inherently or is provided with a mat surface.
• the emulsion can be exposed to a positive of the desired image and the resulting negative image developed with a non-tanning developer. Due to the presence of the light-restraining dye, this produces an image nearer to the surface of the emulsion than to the base.
• a positive image is then formed adjacent the base by any well known reverse printing method as, for example, by bleaching in ammonium bichromate and sulphuric acid solution, then washing and exposing to a strong light.
• the emulsion is then redeveloped in a tanning developer such, for example, as a tanning pyro to develop a positive image adjacent to the surface of the support and at the same time to harden the image so formed.
• the relief image on the base is then developed by washing away the remaining soluble emulsion with hot water.
• this relief image is to be used directly for the color print, it may be treated while it is on'the surface of the base with any well known bleaching solution to render the image transparent and colorless. It is then'dyed with a black or other dark color dye which is not taken by the base, rinsed off in dilute acetic acid and dried. The dark dye renders the image discernible in the manner of an ordinary black and white print and it is then ready to color with any suitable bright color dyes.
• the colloidal relief image on a white, opaque, water-resistant base can also be obtained in other ways.
• a soluble light-sensitive emulsion on a transparent base, the base being preferably mat or frosted. In this case, exposure will be from a negative through the transparent base to form a positive relief image adjacent to the base.
• the emulsion is then processed in the usual way to develop the image on the base, and the image may be dyed a black or dark shade as above described.
• the transparent base with the image is then backed with a white opaque reflecting layer, e. g., by mounting, base down, on a White gelatincoated paper to provide the desired white background for the relief image.
• a white gelatincoated paper should first be washed in a solution consisting approximately of the following:
• the black or otherwise darkened gelatin relief image obtained by the above or any other desired process, may then be colored locally in accordance with the invention of my prior Patent No. 2,244,905 by applying suitable dyes directly to the relief image with a brush or the like.
• the application of dye to the image radually removes the black or other dark color dye from the image and converts it into a colored print.
• the amount of color absorbed by different portions of the image varies with the depth of the gelatin relief, with the result that the same play of light as was present in the original subject is obtained automatically in the colored image.
• the high lights are formed by the dye-resistant surface of the base which, being repellant to the dye, remains clear and free of color.
• the dye may be applied in full strength to the surface of the print, it will be received only in amounts corresponding to the depth of the image. and the play of light and shadow on any given area of local color will therefore practically duplicate that on the original subject.
• a manually colored, photographically toned print comprising a white opaque support having a mat surface and a relief image on said mat surface, the highlights of said image consisting of areas of said mat surface not covered by said relief and the relief being colored in proportion to its thickness by dyes not absorbable by the support.
• a print according to claim 1 in which some highlights are slightly colored by coloring material adhering to but not absorbed by said mat support.
• a sheet material for use in the production of manually colored, photographically toned, prints comprising a white opaque support having a mat surface and a gelatin relief image on said mat surface, the highlights of said image consisting of areas of the mat surface not covered by the gelatin relief, said relief being colorabie by dyes in proportion to its thickness, said support being repellant to said dyes and said mat surface highlights being colorabie by adhesion without absorption.
• a sensitive sheet material for use in the production of manually colored photographically toned prints comprising a support which is repellant to the coloring material used for the manual coloring. and which has a mat surface and a sensitive wash-off relief emulsion layer coated on said mat surface.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)

Priority Applications (2)

Applications Claiming Priority (1)

Publications (1)

Family

ID=23048841

Family Applications (1)

Country Status (2)

Cited By (1)

• 1939
  • 1939-05-19 US US274593A patent/US2324069A/en not_active Expired - Lifetime
• 1947
  • 1947-07-18 FR FR949626D patent/FR949626A/fr not_active Expired

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