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
  • G03C7/22—Subtractive cinematographic processes; Materials therefor; Preparing or processing such materials
  • G03C7/25—Dye-imbibition processes; Materials therefor; Preparing or processing such materials
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S8/00—Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers
  • Y10S8/938—Solvent dyes

Definitions

• This invention relates to the preparation of colored reproductions, especially upon transparent surfaces such as gelatine or the like, and to the resulting product.
• the dye solution so treated is more uni- .formly distributable over the developed matrix surface and is adsorbed thereby more nearly in proportion to the relative contrasts or degrees of development which it presents. Moreover, it is susceptible of being completely-transferred from the wet matrix to the soft, gelatine surface, by imbibition, and consequently a wider range of color values and contrasts is made possible in the printed image produced. 1 It is also found that this surfaces as distinguished from those which are adsorbed by and adhere to the free surface of the gelatine' only or are unequally penetrative thereof.
• sulfonic acid dyes take more actively upon gelatine, in proportion to the'number of sulfonic groups which they contain. Accordingly,*such dyes may be descriptively designated as gelatine penetrative dyes, and While many of them may not be suitable for the purpose of dyeing transparent films on account of other and undesirable attributes, they may be considered, in the aspect of penetrability and resultant contrast effects upon gelatine surfaces, as fundamentally appropriate coloring agents.
• the transmitted light eflect obtained by'a given dye is due to its absorption of the remaining elements of the spectrum
• the transmitted color shall be of the specifically appropriate portion of the spectrum and that the absorption of colors in other portions of the spectrum shall be complete, or substantially so, in this area. It is further desirsuch areas shall not be reduced in intensity except in proportion to the contrast or shade of the transmitted color which is desired.
• Such a circumstance may arise, for example, in reproducing the image of a red curtain in which the folds actually 1 present all gradations of red from a brilliant carmine to an effective or possibly a true black.
• the reproduced print or image of such a color range as heretofore obtained the higher numbers or darker shades, as represented by proportionately greater densities of the dye substance, appear alike and substantially black.
• Bv employing a dye which is characterized by fixation with the gelatine substance and by freedom from self-agglomerating components which deposit upon the surface, but which penetrates freely and preferably at a substantially uniform degree of dispersion or concentration throughout the depth or depths to which it reaches into the gelatine (thereby avoiding segregated layers of dye and also leaving the normal transparency of the gelatine unimpaired) improved color contrast effects are obtained by the present invention.
• the intensity of light may be transmitted through the gela-tine and dye undiminished and also be reflected from one minute dye surface to another, thus passingthrough intermediate paths of relatively transparent media.
• the transmitted light which might be substantially excluded by a relatively thin but compact layer of dye,-as manifested more pan ticularly in the deeper shades and hence greater thicknesses and/or concentrationsmay be permitted to pass relatively freely, by transmission and reflection, through a film in which the same absolute amount of dye substance is applied per unit of area but is distributed'through an appreciable depth or thickness of the film wlth an intervening medium of transparent gelatine.
• this difiiculty is overcome by employing in the dye solution a viscosity agent capable of retarding dispersion of the solution, such as a second dye characterized by good definition and approthat dyes which 7 eer/see priate color value,,without regard to (or possiblyadvantageously of) low penetrability,
• a viscosity agent capable of retarding dispersion of the solution such as a second dye characterized by good definition and approthat dyes which 7 eer/see priate color value,
• the method of the invention includes wetting a developed matrix film, typically presenting in its developed areas, a wide range of image contrasts (corresponding, e. g. to the full H. & D. scale) with a dye solution characterized. by mani festing selective and relatively proportioned adsorption toward such developed areas of the matrix on the one hand, and, on the other, a rapid and uniformly penetrative and distributive absorption into a relatively soft i. e.
• dye-absorptive and preferably wet surface of a gelatine film (with or without qualifying agents as hereinafter set forth) and firmly contacting the thus wet matrix surface with the softgelatine surface to be printed, preferably underwater and for a short interval of time followed by separating the two surfaces,-and repeating the printing operation thereo'n, if desired, with other printing matrices carrying images, usually complemental to the first and with a dye or dyes of complementary colors.
• the invention is directed to reproductions upon surfaces of a gelatinous compositionsuch as those provided on transparent celluloid films and the like by coating with a gelatin solution. It is further desirable and, for purposes of highly satisfactory cinema production, practically.
• the coloring agent or dye shall be of marked though relatively uniform adsorption or penetration characteristics with respect tothe gelatinous surface, without appreciable tendency to difiuse laterally either through or over the gelatine surface, upon contacting therewith.
• a further desirable qualification of the dye is that it shall promptly become and thereafter remain permanently fixed in situ, as by a more or less stable chemical or physical association, with the gelatinous substance.
• the dye solution should not tend-to adhere to norbe withdrawn by the matrix surface, upon separation from the printed gelatine surface therefrom. And moreover it should attain its maximum depth of penetration relatively promptly, leaving a uniform distribution of dye therethrough, without subsequent tendency to disperse through the film, nor leave any superficial liquid to disperse laterally between the contacting surfaces.
• a cellulosic film of celluloid or other transparent material, is first prepared, such as is generally employed for photographic use. To this is applied a coating of a solution containing gelatine, a hardening agent such as potassium dichromate and usually an organic acid such as acetic acid. The coating thus formed is then allowed to dry rapidly and is subsequently hardened to the desired degree in known ways.
• a hardening agent such as potassium dichromate and usually an organic acid such as acetic acid.
• a plurality of matrix films each bearing an image to correspond to one (or more) of the primary colors or to each of two (or more) complemental colors appearing in the reproductlon to be made, 1s next prepared, as by suitably exposing and developing or light printing and developing a photographic film therefor.
• a film matrix may be prepared and developed to correspond to the red portion of the images in the subject to be reproduced and a second matrix film may be developed to correspond to the green portions thereof. This may be effected in any suitable manner, according to the appropriate photographic technique, which has been fully established for such purposes and is well known in the art.
• the matrix surface is most convenout the range of the H. & D. scale.
• the dye is not permanently absorbedby the matrix film, but may be transferred to a softer gelatine surface (as above defined) by contact.
• a softer gelatine surface as above defined
• the dye-wet or printing areas shall also stand in relief above the nondyed portion of the matrix.
• Green Wool green S sodium salt of tetramethyldi-amino-dl-phenyl B-hydroxy-naphthyl carhinol-disulfonic acid anhydride, color index 737 (4.5% egg-treated) 6,000 cc. Metanll yellow, sodium salt of M-sulfo-hcn- Y zcne-azo-di-phenyl amine, color index 138 22 grams Glacial acetic acld 600 cc.
• the matrix film bearing the images which are to be reproduced in red, is now immersed in the red dye solution, rinsed, and brought into firmand intimate contactwith the gelatinized surface of the blank film (preferably images and under water to eliminate gaseous enclosures of air) and a slight pressure is applied betweenthe contacting surfaces, as by passing between pressure rollers. Such contact is maintained'foran appreciable period of time, as determined by experiment to be sufficient for complete transfer ofthe dye from the matrix to the blank film.
• the films are then separated.
• the printed film is preferably dried, and next brought into contact 'with the matrix film bearing the images to bereproduced in green, which has been similarly wet by passing through the green dye solutiomand then rinsed.
• the two films are preferably brought together under water as before and pressed firmly together. Thereupon the green dye is transferred from the matrix to thegelatine surface and, by virtue of its complementary relationship thereto, forms a complete composite color reproduction on the gelatine film.
• the printed film is then dried in the usual manner and is ready for use.
• a composition for imbibition printing comprising a liquid characterized by containing a dye substance in solution and by normally manifesting a marked penetrability of the solid to be printed therewith, and a viscosity increasing agent, added thereto.
• a fluid composition for imbibition printing comprising a liquid characterized by containing a dye substance in solution and by normally manifesting a marked penetrability memos of the surface to be printed therewith and a second liquid characterized by manifesting low penetrability or dispersion into such surface, said liquids bein mut-uall miscible.
• a fluid compositlon for im ibition printing comprising a dyesolution, characterized by normally manifesting a marked penetrability into a gelatinous surface, to depths proportional to the amount applied thereto and of uniform distribution throughout the penetrated depth, and a viscosity agent uniformly miscible therewith and characterized by imparting plastic flow to the composition.
• a liquid composition for imbibition printin of films comprising a gelatine penetrative dye and a dye characterized by high /viscosity.
• a dye soiution for use in imbibition printing comprising a gelatine penetrative dye characterized by manifesting uniformity V, metanil yellow (color index 138).

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Printing Methods (AREA)
• Coloring (AREA)

Applications Claiming Priority (1)

Publications (1)

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ID=31945610

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• 0
  • US US1807809D patent/US1807809A/en not_active Expired - Lifetime
  • US US1807805D patent/US1807805A/en not_active Expired - Lifetime
• 1927
  • 1927-04-19 GB GB10522/27A patent/GB270279A/en not_active Expired
  • 1927-04-24 DE DET33384D patent/DE544245C/de not_active Expired

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