US2107094A - Colored photography - Google Patents

Colored photography Download PDF

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Publication number
US2107094A
US2107094A US51170A US5117035A US2107094A US 2107094 A US2107094 A US 2107094A US 51170 A US51170 A US 51170A US 5117035 A US5117035 A US 5117035A US 2107094 A US2107094 A US 2107094A
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US
United States
Prior art keywords
color
image
print
dye
bath
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
US51170A
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English (en)
Inventor
Townsend Oliver Arnold
Masters Arthur Percival
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.)
Tru Colour Film Ltd
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Tru Colour Film Ltd
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 Tru Colour Film Ltd filed Critical Tru Colour Film Ltd
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Publication of US2107094A publication Critical patent/US2107094A/en
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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
    • G03C7/22—Subtractive cinematographic processes; Materials therefor; Preparing or processing such materials
    • G03C7/25—Dye-imbibition processes; Materials therefor; Preparing or processing such materials

Definitions

  • the invention relates to the art of color photography, and is concerned with the production of multi-colored photographs or pictures obtained by blending color images on' a single base.
  • the object of the invention is to provide an improved process to be used in the production of multicolor photographs as aforesaid, whether still photographs or moving picture photographs, in order that said photographs may be obtained in a simpler manner than heretofore without sacriiicing fidelity of color and detail, as compared with photographs produced by known and more elaborate processes.
  • the process to be herein described may be said to commence with the treatment of a set of color record prints containing photographic silver images, andv made in known manner by any suitable method, the present invention providing a novel and advantageousmode of proceeding from said color record prints to secure final multicolored photographs or pictures.
  • the color record prints can be made on any suitably sensitized photopaper, celluloid or other base, capable of receiving any necessary photographic treatment accbrding to known practice, to produce'photographic silver images as aforesaid.
  • the main feature of' the invention resides in dye-toning the photographic silver image of a color record print with dye in association with a mordant, whereby the image is brought to a condition such that color can be transferred therefrom to a separate surface by' c'pntact with the latter.
  • a further feature of the invention is the utilization of the mordant and dye to result in building up cr -continuation of the image in relief, thecolor being transferable from said relief to a separate surface.
  • All of the images can be .dyetoned, and color transferred therefrom and blended on a separate surface, or'one of said images can be colored so that color will not transfer therefrom, in which case color is transferred from the dye-toned images to the image from which color is nontransferable.
  • the improved process will first bedescrlbed as proceeding from a set of two positive color record prints made from two color selective negatives, both positive prints being printed to obtain the 55 necessary gradation and weight required to give the desired effect in the final photograph or picture. o r
  • the print produced from the red-yellow record negative is toned blue in an iron bath preferably as follows: i 5
  • Ferric chloride "milligrams" 300 Oxalic acid mllligrams- 900 Nitric acid -cubic centimetres 1.5
  • said print may be dyetoned as follows;
  • the reduced or developed metallic silver image 20 of the print is first brought to a condition in whichitzwill be receptive to a dye or dyes during subsequent treatment; certain formulae already well known in photographic bleaching being capable of being used for this purpose, a suitable 25 formula comprising cupric chloride or bromide, with or without acids such as acetic, nitric, hyv drochloric or the like in the following proportlons:
  • Acetic acid (optional) cubic centimetres" 1 to 1.5
  • the optimum time for treatment in the bath 35 just given is two minutes.
  • the print is then treated inya bath containing 1o v so -in solution a suitable dye or dyes, and an intermediary agent which will cause the dye to attach sufllciently to the conditioned or receptive image, 40 to build up a colored image for use in the transvfereuce process as hereinafter described;
  • the in-- termediary agent may be what is known in chemistry as a thio-aminocompound, especially one in which the sulphur'is in a re-active condition, and in which one or more amino or substituted amino groups remain free to enter into chemical reaction-'.
  • Suitable such intermediary'agents are thiocarbamide andv thiosinamine, whilst cystein and thioacetamide have also been found capable of acting in the desired manner.
  • Dyes suitable for this blue bath are those known on the market under the trade names Patent Blue L, or BL, other dyes also being available, I v
  • Patent Blue L or BL milligrams 150 Thiocarbamide milligrams to 150 Water cubic centimetres 170
  • the bleached or conditioned image is allowed to come into contact or association with the dye solution, when the dye or dyes attaches or attach to the image, it being found that contact or association of the latter with the bath for approximately 3 minutes' is adequate.
  • the colored or dyed image is then washed until excess dye and other water soluble substances are sumciently removed.
  • the bleached or conditioned image may first be treated in a bath of thiocarbamide or material that will act in a similar manner, and
  • next step would be to treat the image in the blue-dye bath either containing, or
  • a thiocarbamide bath without dye can comprise thiocarbamide 50 to 200 milligrams, and water 170 cubic centimetres.
  • the silver image of the print from the violet blue green yellow record is then bleached or conditioned as before described, and is dye-toned red-yellow, in a bath similar to thatdescribed for dye toning the print taken from the ,red
  • cupric chloride when used to bleach or condition the images prior to dye toning, andalthough other bleaching or conditioning agents may be used, those agents containing copper have the advantage that there 1 results during dye toning, a staining of the gelatine of the emulsion by the acid fuchsin, and although said stain becomes decolorized during washing after dye toning, it may be revived or made apparent as will be later described.
  • the next step is to combine color from, or-of, the colored images of the two positive prints, on the one base, and if an iron blue toned print from which color is not transferable is used, said print ,is first immersed in a bath containing a suitable salt such as potassium bromide, with or without an acid, the following bath for example, having been found suitable:-
  • a suitable salt such as potassium bromide, with or without an acid
  • colorfrom the red-yellow print may be transferred to the blueprint, after the latter has been immersed in the" bromide bath, but before said blue print is toned.
  • the blue print is then immersed in the blue toning bath, until it is suflicientlycolored, this treatment however, only being carried out when the contents of the iron toning bath will not spoil color transferred from the red-yellow print.
  • print image may be blue dyeitoned as, described in connection with the dye toning of the redyellow print, instead of being iron blue toned, and transference from both the blue and the redyellow dye toned print images may be .made to Y a separate suitable surface, whether or not the latter has any image, toned or untoned on it, and in such case after the first transference of color has been made, said surface is treated to fix the transferred dye image, and prevent undue running' or retransfer to further prints which may subsequently be brought into contact therewith.
  • Such a fixative bath can consist of acetic or other acid, thiocarbamide or other similar compound,
  • any of the following baths being suitable for the purpose:
  • Treatment in any of the aforesaid fixative baths also has the effect of expanding a paper base back to the state it was in upon receivingthe first physical color impression, this stretching treatment being desirable where a second transfer or impression is made to or .on a print which has already received a transferred image.
  • agents or reagents such as the above, may alsobe employed to brighten the reds.
  • the yellow parts may be lightened or bleached by the use of certain chemicals such as The extra tones or shades" before referred to. may be brought up, and the yellows brightened or bleached, before transference of the colors.
  • one or more of the prints may befixed by immersion in any photographic fixing agent, such as hypo, provided it does not injuriously affect the color,
  • a further finishing effect treatment may consist in immersion in a dilute acid bath, before or after transference of color from an image.
  • the silver images of the positive prints are then bleached or conditioned as. described in connection with the prints from the two color selective negatives, after which they are dyetoned, a separate color bath of the requisite color being used for each print.
  • An iron blue toning bat-h can be used instead of a blue dye bath if desired.
  • the red and yellow, and other colored print images are transferred to the iron blue toned print which becomes the photograph or picture, or all of the print images, if dye toned, may be transferred to any selected one of said prints, or to any suitable separate surface with or without a toned oruntoned image thereon.
  • the bringing up of the pink or other stain, and Y the brightening or lightening or bleaching of the yellow, or yellow color; and red or red color, may also be carried out when more than two neg-.-
  • the print images may be brought to the same state by placing a print or prints in a softening or hardening bath, or even a cold or prints. This may be accomplished in several ways,
  • iron blue toned print may, before or after other images are transferred to it, be
  • a developer such as acid amidol where the silver ferrocyanide formed during blue toning is converted back to metallic silver, or other suitable agent to form the required color image from the silver ferrocyanide, provided such treat ment does not injure the blue toned or other. images.
  • Coloring or/and dyeing of the images is then carried out in the manner and according to the description and directions before given, care being taken to prevent'color from one image detrimentally affecting the other image duringtreatment.
  • a print is made from a color separation negative; developed, washed and colored or dyetoned in an appropriate color in the manner and according to the directions and information before given.
  • Thei film can then be treated according to known practice for the purpose of receiving a further image, provided such treatment causes no injury to the previously colored image.
  • each separate transparent base has a light sensitive emulsion on one or both sides, each or any emulsion receiving a printed image from a color separation negative, the image if necessary Color separation prints may also be obtained by using a multi-colored screen plate, or other colored negative, and'printing therefrom on t0 separate surfaces, each of which is sensitized to receive a recordof selected rays, the prints obtained, if necessary, beingtreated as before de- 4 scribedvfor transference of color to a, oomin'on base, whereby a multi-coior photograph or plcture'is produced.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Coloring (AREA)
US51170A 1934-12-13 1935-11-22 Colored photography Expired - Lifetime US2107094A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NZ2107094X 1934-12-13

Publications (1)

Publication Number Publication Date
US2107094A true US2107094A (en) 1938-02-01

Family

ID=19921029

Family Applications (1)

Application Number Title Priority Date Filing Date
US51170A Expired - Lifetime US2107094A (en) 1934-12-13 1935-11-22 Colored photography

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US (1) US2107094A (fr)
FR (1) FR804015A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494765A (en) * 1944-11-10 1950-01-17 Keuffel & Esser Co Chemical erasing of photographic silver images
US2635535A (en) * 1946-01-31 1953-04-21 Du Pont Mordanting
US2770542A (en) * 1951-08-31 1956-11-13 Tru Colour Film Ltd Colour photography
US4247615A (en) * 1980-03-06 1981-01-27 Eastman Kodak Company Continuous-tone dyed diazo imaging process

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494765A (en) * 1944-11-10 1950-01-17 Keuffel & Esser Co Chemical erasing of photographic silver images
US2635535A (en) * 1946-01-31 1953-04-21 Du Pont Mordanting
US2770542A (en) * 1951-08-31 1956-11-13 Tru Colour Film Ltd Colour photography
US4247615A (en) * 1980-03-06 1981-01-27 Eastman Kodak Company Continuous-tone dyed diazo imaging process

Also Published As

Publication number Publication date
FR804015A (fr) 1936-10-14

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