US2750292A - Process for producing colored photographic contrasts - Google Patents

Process for producing colored photographic contrasts Download PDF

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US2750292A
US2750292A US227564A US22756451A US2750292A US 2750292 A US2750292 A US 2750292A US 227564 A US227564 A US 227564A US 22756451 A US22756451 A US 22756451A US 2750292 A US2750292 A US 2750292A
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metal
image
contrast
solution
silver
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Dippel Cornelis Johannes
Jonker Hendrik
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Hartford National Bank and Trust Co
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Hartford National Bank and Trust Co
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    • 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
    • G03C1/52—Compositions containing diazo compounds as photosensitive substances
    • G03C1/62—Metal compounds reducible to metal

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  • the invention relates to a process for producing coloured photographic contrasts.
  • Coloured photographic contrasts have heretofore been produced by exposing a light-sensitive system to the action of light having a given spectral distribution l.followed by developing the resulting light-decomposition product formed upon exposure to a contrast of desired colour or to a contrast which is subsequently converted into the corresponding colour by causing dyestuffs to form a coloured contrast yon the film.
  • the formation of the dye contrast takes place simultaneously and in situ with the formation Yof' the metal contrasts during physical development.
  • the metal may or may not be then removed as desired.
  • the invention -makes use of a developing process known as physical development as distinguished from chemical development, the metal required for contrast vformation being largely supplied from the developer whereas in chemical development the metal required for contrast formation being available only from the metal ions in the crystal lattice of the grains on the film.
  • Latent images formed by -the reaction of a light-de composition product with a metal salt from the group consisting of mercury, silver, gold and platinum in this manner provide suitable contrasts for producing coloured images by physical colour development.
  • All known standard dye-formations may be employed in physical colour development.
  • the dye-formation mayor may ⁇ not take place in coaction with a colour coupler.
  • the coloured photographic contrasts produced by the process according to the invention are extremely sharp, deep-coloured, and substantially free from fog.
  • Fig. 2 shows a colour of the film
  • Fig. 3 shows the formulae of the various dyestui forming compounds referred to in the specificationand the following examples:
  • Example I A lm consistingof superfcially saponied cellulose acetate is sensitized by immersing it in an aqueous solution containing 5% of mercuric chloride 5% of ferrie ammonium oxalate and 2.5% of ammonium oxalate The adhering liquid is Vremoved and lthe 'film is dried.
  • the developed tilm is washed, whereupon the metal image may be dissolved, for example .by means of a liquid containing potassium ferricyanide and a .thiosulphate, a fog-free, positive, red dye image being obtained. Finally the iilm is washed in running water.
  • the colour formation takes place with the aid /of a colour coupler during the ⁇ physical development.
  • This form olfers a large variety of possibilities of obtaining the desired colour shade.
  • the dye forming component Y may be incorporated in the sensitized layer of the photographic material used as a starting point for the method according to the invention. If the dye forming component is incorporated in the sensitized layer it should be sufficiently fast to diffusion. Methods of rendering dye forming components fast to diffusion are known, the choice of the dye forming component being also determined by considerations .of a general practical nature. Thus, for example, it isessential that the dye forming component which is to be incorporated in the layer must not be detrimental to the reaction of light and must not have a disturbing effect in some other respect.
  • a.dye forming component into the layer by means of a solvent and by a separate treatment between exposure and development, which component may dissolve to an insuliicient degree inthe ⁇ developer but otherwise may have advantageous properties.
  • Example II Astrip .of film of the same type as used in Example I is lsoaked in succession, after exposure and washing, in an aqueous solution of 2% of pentabrom-2,3,4,6,7 naphthol-l (Formula IV) and 0.3% of sodium hydroxide and in a 0.2 n solution of sulphuric acid in water.
  • the film is treated for 5 minutes with a colour forming physical developer, containing 0.08% of stabilized colour developer having p-diethylaminoaniline (Formula XXXI) as the active component and marketed by May and Baker under the registered trademark of Genochrome 0.5% of sodium thiosulphate 0.2 n ammonia and '0.4% of silver nitrate in distilled water After ,removal of the metal image ka .green dye image is obtained.
  • a colour forming physical developer containing 0.08% of stabilized colour developer having p-diethylaminoaniline (Formula XXXI) as the active component and marketed by May and Baker under the registered trademark of Genochrome 0.5% of sodium thiosulphate 0.2 n ammonia and '0.4% of silver nitrate in distilled water
  • Example III After exposure and Washing a strip of lm of the type used in Example I is treated for 20 minutes with an aqueous solution containing 0.15% of Z-phenylsemicarbazide (Formula V) 0.25% of sodium hydroxide 0.1% of naphthol-2 (Formula VI) l n ammonia and 0.4% of silver nitrate After removal of the metal image an orange dye image is obtained.
  • the physical colour forming developer contains a soluble mercury compound as a metal compound.
  • these developers have the advantage over the developer containing silver compounds that they are more stable for an equivalent developing effect.
  • it is advantageous that physical colour forming mercury developers are serviceable in the weekly acid pH-range, whereas corresponding silver developers have serious limitations in this respect, which is of importance in view of the conditions of formation and/or the stability of particular dyes.
  • Example IV After exposure and washing, another strip of the film of the type used in Example I is brielly dipped in a 2 n aqueous solution of ammonia and physically colour-developed for minutes in a mixture of 25 ccs. of an aqueous solution containing 0.2% of Genochrome (Example II) 3% of sodium carbonate (water free) 3.5% of potassium thiocyanate and 0.7% of mercurio bromide and 1 ccm. of solution of 2% of phenyl-l methyl-3 pyrazolone-5 (Formula VII) in ethanol.
  • Example V A lm consisting of regenerated cellulose is sensitized by soaking in an aqueous solution containing 0.4 n hydroxy-l diazonium-2 methyl-6 benzenesulphonic acid-4 and 0.1 n mercurous nitrate.
  • the dried film is exposed under a transparent negative by means of a mercury vapour lamp and immersed immediately after that in a physical colour forming developer obtained by mixing 25 ccs. of an aqueous solution of 0.08% of the nitrate salt of the compound dimethyl-l amino-4 phenylamine (Formula VIII) 0.09 n nitric acid and 0.024 n mercurous nitrate and 1 ccm. of an alcoholic solution of 10% naphthol-l (Formula IX). The duration of the development is minutes. A mercury image in situ with a dye image are obtained. The positive bluish-green dye image is insulated by removal of the mercury image, for example in the solution referred to in Example I.
  • a physical colour forming developer obtained by mixing 25 ccs. of an aqueous solution of 0.08% of the nitrate salt of the compound dimethyl-l amino-4 phenylamine (Formula VIII) 0.09 n nitric acid and 0.024 n
  • the pI-I value of the developer should preferably be made smaller than 7 if this condition is consistent with the rapidity of the colour forming reaction, with the solubility of the dye forming component and with the stability of the desired dye. This choice has the advantage of obtaining fog-free dye images and in addition the dyes produced generally have a lower degree of solubility. Moreover, it has been found that the stock solution for such a developer, which consequently does not contain a noble metal compound, is much stabler than the stock solution of a corresponding chemical colour developer.
  • Example Vl A leaf of unsized paper is sensitized by soaking it, for example, in the solution referred to in Example V. After exposure of a piece of the dried paper it is briefly washed in distilled water and subsequently colour-developed for 5 minutes in a physical developer obtained by mixing 25 ccs. of an aqueous solution of 0.08% of ethylbenzylamino 4 (Formula X) 5% of tartaric acid and 0.4% of silver nitrate and 3 ccs. of a saturated aqueous solution of dimethylamino-l-acetylamino-3 benzene (Formula XI).
  • a physical developer obtained by mixing 25 ccs. of an aqueous solution of 0.08% of ethylbenzylamino 4 (Formula X) 5% of tartaric acid and 0.4% of silver nitrate and 3 ccs. of a saturated aqueous solution of dimethylamino-l-acetyla
  • Example VII A film consisting of regenerated cellulose is sensitized by soaking for 2 minutes in an aqueous solution of 0.2 n silver nitrate, followed by soaking for one minute in a 2 n potassium bromide and 0.5 n nitric acid aqueous solution. Before use, the last-mentioned solution is briefly warmed to boiling temperature and cooled, the lm being subsequently rinsed in running Water and dried.
  • a strip of the film is exposed under a transparent negative by means of an electric incandescent lamp and subsequently treated for 3 minutes with a physical colourdeveloper obtained by mixing 25 ccs. of an aqueous solution of phenylamine nitrate 0.08% of nitrate salt of the compound dimethylamino-4 phenylamine (Formula VIII) 5% of tartaric acid and 0.4% of silver nitrate and 1 ccm. of a solution of a dye-forming component, for example that used in Example IV.
  • a physical colourdeveloper obtained by mixing 25 ccs. of an aqueous solution of phenylamine nitrate 0.08% of nitrate salt of the compound dimethylamino-4 phenylamine (Formula VIII) 5% of tartaric acid and 0.4% of silver nitrate and 1 ccm. of a solution of a dye-forming component, for example that used in Example IV.
  • a strong magenta dye image is obtained.
  • Another strip of the same film is exposed under a sensitometer and colour-developed for 10 minutes in a physical developer obtained by mixing 25 ccs. of an aqueous solution of 2% of the sulphate salt of the compound (hydroxy-4 phenyl) methylamine (Formula XII) 4% of tartaric acid 0.4% of silver nitrate and 2.5 ccs. of an alcoholic solution of 10% naphtol-l (Formula IX).
  • a dark-brown dye image is obtained in situ with a black-silver image, the contrast being materially increased by the dye image.
  • Example VIII A piece of the sensitized paper of Example VI is exposed, briefly rinsed and developed for 6 minutes in a physical colour-forming developer obtained by mixing 25 ccs. of an aqueous solution of 2% of benzenediol-1-4 (Formula XIII) 1% of lactic acid and 0.4% of silver nitrate and 3 ccs. of a 2% phenol alcoholic solution (Formula XIV).
  • a dark brown dye image is obtained in situ with a black metal image as a result of which the contrast is much stronger than if the solution of the dyeforming component is not added.
  • Example IX Cellulose acetate saponitied at the surface is sensitized by soaking it in an aqueous solution ycontaining 0.02% of methylene blue. The greenish blue iilm Yabsorbs red light but is substantially transparent to -blue and 1green rays. Exposure is effected under a transparent Knegative by means of an electric incandescent lamp. After exposure it is treated for half a minute with a 1% silver nitrate solution in water, followed by rinsing the dye vout of the lm.
  • the film is colour-developed for 6 minutes to a greenish blue tone by means of the physical dimethyl-amino-4 phenylaminenitrate developer of Example VII to which double the quantity of a solution of naphtol-l in ethanol is added instead of l com. of a Vpyrazolone solution.
  • the silver image is .removed as indicated and a positive dye image is obtained.
  • Example XII The following stock solutions for colour-formingphysical developers are prepared:
  • solution B l cmof solution C1 or C2, or-0.3 ec. of solution C3.
  • solution C may alternatively be replaced by the admixture of 25 mgms. of hydroxy-l naphthalenesulphonic acid-4 (Formula XX). After removal of the metal images green and greenish blue dye images are obtained.
  • the following stock solutions are also prepared:
  • the method according to the invention may be used for silver halide material and then has the aforesaid advantages. However, it has the particular advantage that it may also be used for other systems, for example those which are based on the light-sensitiveness of diazo compounds for which the chemical colour-forming development cannot be used directly.
  • the high resolving power inherent in ⁇ these systems and the tine grains obtained by physical development can be utilized to full advantage.
  • the method according to the invention for these systems it is readily possible to produce dye images having a resolving power of 700 lines per millimeter. In copying, this high resolving power permits, if desired, a considerable reduction of the image size. In this case, it is also possible to utilize the property that the characteristic curve of the dye image gradually rises during development and does not bend over at higher optical densities. This permits highly saturated colours to be o btained.
  • the method according to the invention permits the production of'images in one colour in paper, regenerated cellulose, wood, glass and so when sensitizing these materials, ⁇ for example by incorporating ka diazocompound with the aid of a simple soaking technique.
  • the aforesaidphysical developers containing a soluble mercury compound have vthe additional advantage that they may also serve to form the latent metal contrast, so that a separate treatment for the formation of this image is superfluous. '1n this case the material need not contain a mercury compound.
  • the method according tothe invention permits, for example, the production of developing photoprinting papers in a variety of colours, which are much more ysensitive than the conwhich are often 'faster to light.
  • Example XIV Paper is sensitized by soaking it in an aqueous solution of 2% of methyl-l Chlor-2 benzenediazosulphonic acidsodium-4. A strip of the dried paper is exposed under a transparent negative by means of a mercury vapour lamp. The latent mercury contrast is formed by immersion in the physical colour developer of Example V, this contrast being developed with the simultaneous formation of a positive dye image after continued stay in the said developer.
  • a promising use of the method according t'o the invention is in the eld of textile printing, since photographic images in cotton, artificial silk, silk and so on can be produced in a single manner with the use of the aforesaid sensitization technique.
  • Example XV A white cotton handkerchief is sensitized by soaking it in an aqueous solution containing 0.2n hydroxy-1 diazonium-Z methyl-6 benzene sulphonic acid-4 0.2n mercurous nitrate and 0.2n nitric acid and dried. The handkerchief is subsequently exposed behind a photographic negative by means of a mercury vapour lamp. After rinsing in distilled water it is colourdeveloped for 10 minutes in a physical developer obtained by mixing 25 ccs. of
  • the metal image is removed after rinsing.
  • the red positive image is again rinsed and ironed to dryness between two cloths by means of a smoothing iron.
  • the image may be washed with greatity in warm soap suds.
  • the method according to the invention may be used for producing images in more than one color, for example according to the so-called subtractive method and in addition for making color gratings for use in the so-called additive method.
  • separation negatives or color extracts may be started with. From each of these partial negatives the corresponding colored positives are made by means of the method according to the invention, the partial images being made in register or arranged in register by superposition. If desired, one of the images may be gray. In a further preferred embodiment of the method according to the invention, differently coloured images are provided in succession in a single layer by successive sensitization, exposure and development. This is advantageous since the images extend substantially in one plane. Naturally, the sensitization necessary for each image should not adversely affect existing images.
  • existing images may affect the formation of further images. rI ⁇ his may cause changes in the colors of the resulting total image, which changes may be undesirable, fo-r example when it is intended to reproduce natural colors.
  • reference may be made to the disturbance due to absorption of light by existing images.
  • the existing metal image is dissolved and, according to a further feature of the invention, light of the type transmitted by the existing dye images is used for the production of each image.
  • visible light it is possible to use ultra-violet or infra-red rays.
  • the metal image produced on forming each partial image is amenable to further color-development in following colors. This also may be a reason for rendering these metal images unarnenable to further color-forming development for the following sensitization.
  • Example XVI A film consisting of cellulose acetate saponied bilaterally at its surface (saponied layers approximately 10/p. thick) is sensitized by incorporating in the saponified layers an aqueous solution containing, for example, 0.4 n of the diazonium compound of Example XV and mercurous nitrate.
  • rOne ofthe partial positives may be vmade by means 4of any of the well-'known.toning, mordanting and similar processes, .starting witha met-al image obtained by normal physical development. In general, however, direct physical .colorfforming development of all partial positives is .to be .preferred because of its simplicity.
  • Example XVII Paper is ⁇ sensitized by soaking it in an aqueous solution containing 0.2 n hydroxy-l diazonium-2 methyl-6 benzenesulphonic acid-4 and 0.1 n mercurous nitrate.
  • the dried paper is exposed behind a green color extract. .After a short wash in distilled water the paper is color-developed for 6 minutes in a physical developer containing 0.08% of.amino4 phenylamine (Formula XXX) .5 V.of tartaric ,acid
  • the metal image for example as stated in Example I, is removed and )a purple partial image is obtained.
  • color-development may take place in the physical developer: 25 ccs. of 'solution A4, 3 ccs. of
  • the images in carrying out the method according to this example, are preferably produced in a thin layer adhering to a satisfactorily moisture-proof carrier ⁇ (for example .cellulose -triacetate) and intense drying of the layer .takes place only after the last partial image has been processed.
  • .the method according to the Yinvention is usedffor making colours gratings.
  • This permits -making gratings both with irregular and regular colours mosaics, the .latter .having these advantages in Yaddition to those which the known gratings of this type have.
  • the method according tothe invention permits the production of gratings in which at least one of the linear dimensions of the lgrating elements is very small.
  • Example XVIII A lilm consisting of cellulose triacetate saponified at the surface is sensitized by soaking in an aqueous solution of 0.4 n hydroxy-1 diazonium-2 methyl-6 benzenesulphonic acid-4 and 0.1 n mercurous nitrate. It appears that this ⁇ light-sensitive material, upon colour-forming physical development by means of developers referred to in Example VII, for example 25 ccs. of A1, 3 ccs. B2, l ccm. C or 25 ccs. A2, 3 ccs. B1, l ccm. C, reproduces 700 sharply separated lines per mm. in red or blue colour.
  • a colour grating can beproduced by lbe imagined in which colour gratings may be lmade by means of the method according to-the invention.
  • the grating may be used both for an additive reversal process and for a negative-positive process.
  • a method of' producing a color photographic contrast which .comprises exposing portions of a layer containing a light sensitive compound selected from the group consisting of diazonium compounds, diazo -compounds, ferric vammonium oxalate, -ferric ammonium citrate and methylene blue, treating the exposed layer with moisture in the presence of a water soluble salt of a metal selected from the group consisting of mercury, silver, gold 'and platinum to produce a latent image ofone of said metals, and applying to said latent metal image a developing solution containing a reducible salt of a metal selected from the group consistingof mercury, silver, gold and platinum and an organic reducing agent capable 'of reducing said salt to metal while forming an oxidation product which yields an insoluble organic dye contrastsimultaneously in place with a metal contrast.
  • a light sensitive compound selected from the group consisting of diazonium compounds, diazo -compounds, ferric vammonium oxalate,
  • a method of producing a color photographic contrast which comprises exposing portions of a layer containing a light sensitive compound selected from the group consisting of diazonium compounds, diazo compounds, Vt'erric ammonium oxalate, ferrie ammonium 'citratevand methylene blue, treating the exposed layer with moisture in the presence of a water soluble salt of a.
  • a light sensitive compound selected from the group consisting of diazonium compounds, diazo compounds, Vt'erric ammonium oxalate, ferrie ammonium 'citratevand methylene blue
  • metal selected from the group consisting of mercury, silver, gold and platinum to produce a latent image of one of said metals, and applying to said latent metal image a developing solution containing a reducible salt of a metal selected from the group consisting of mercury, silver, gold and platinum and an organic reducing agent capable of reducing said salt to metal While forming an oxidation product Which yields an insoluble organic dye therely yielding an insoluble organic dye contrast simultaneously in place with a metal contrast.
  • a method of producing a color photographic contrast which comprises exposing portions of a layer containing a light sensitive compound selected from the group consisting of diazonium compounds, diazo compounds, ferric ammonium oxalate, ferrie ammonium citrate and methylene blue, treating the exposed layer with moisture in the presence of a Water soluble salt of a metal selected from the group consisting of mercury, silver, gold and platinum to produce a latent image of one of said metals, and applying to said latent metal image, in the presence of a color coupler, a developing solution containing a reducible salt of a metal selected from the group consisting of mercury, silver, gold and platinum and an organic reducing agent capable of reducing said salt to metal While forming an oxidation product which couples with said color coupler to form an insoluble organic dye thereby yielding an insoluble organic dye contrast simultaneously in place with a metal contrast.
  • a light sensitive compound selected from the group consisting of diazonium compounds, diazo compounds, ferric ammonium oxalate,
  • a method of producing a color photographic contrast which comprises exposing portions of a layer containing a light sensitive compound selected from the group consisting of diazonium compounds, diazo compounds, ferric ammonium oxalate, ferrie ammonium citrate and methylene blue, treating the exposed layer with moisture in the presence of a water soluble salt of a metal selected from the group consisting of mercury, silver, gold and platinum to produce a latent image of one of said metals, and applying to said latent metal image a developing solution containing a color coupler, a reducible salt of a metal selected from the group consisting of mercury, silver, gold and platinum and an organic reducing agent capable of reducing said salt to metal While forming an oxidation product which couples with said color coupler to form an insoluble organic dye thereby yielding an insoluble organic dye contrast simultaneously in place with a metal contrast.
  • a light sensitive compound selected from the group consisting of diazonium compounds, diazo compounds, ferric ammonium oxalate, ferrie ammonium
  • a method of producing a color photographic contrast which comprises exposing portions of a layer containing a light sensitive compound selected from the group consisting of diazonium compounds, diazo cornpounds, ferrie ammonium oxalate, ferrie ammonium citrate and methylene blue, treating the exposed layer with moisture in the presence of a water soluble salt of a metal selected from the group consisting of mercury, silver, gold and platinum to produce a latent image of one of said metals, and applying to said latent metal image a color coupler and then applying a developing solution containing a reducible salt of a metal selected from the group consisting of mercury, silver, gold and platinum and an organic reducing agent capable of reducing said salt to metal while forming an oxidation product which couples with said color coupler to form an insoluble organic dye thereby yielding an insoluble organic dye contrast simultaneously in place with a metal contrast.
  • a light sensitive compound selected from the group consisting of diazonium compounds, diazo cornpounds, ferrie ammonium oxa
  • a method of producing a color photographic contrast which comprises exposing portions of a layer containing a light sensitive compound selected from the group consisting of diazonium compounds, diazo compounds, ferric ammonium oxalate, ferrie ammonium citrate and methylene blue, treating the exposed layer with moisture in the presence of a Water soluble salt of a metal selected from the group consisting of mercury, silver, gold and platinum to produce a latent image of one of said metals, and applying to said latent metal image a developing solution having a pH of less than 7 and containing a reducible salt of a metal selected from the group consisting of mercury, silver, gold and platinum and an organic reducing agent capable of reducing said salt to metal While forming an oxidation product which yields an insoluble organic dye contrast simultaneously in place with a metal contrast.
  • a light sensitive compound selected from the group consisting of diazonium compounds, diazo compounds, ferric ammonium oxalate, ferrie ammonium citrate and methylene blue
  • a method of producing a color photographic contrast which comprises exposing portions of a layer containing a light sensitive compound selected from the group consisting of diazonium compounds, diazo compounds, ferric ammonium oxalate, ferrie ammonium citrate and methylene blue, treating the exposed layer with moisture in the presence of a Water soluble salt of a metal selected from the group consisting of mercury, silver, gold and platinum to produce a latent image of one of said metals, and applying to said latent metal image a developing solution containing a reducible mercury salt and an organic reducing agent capable of reducing said mercury salt to mercury while forming an oxidation product which yields an insoluble organic dye contrast simultaneously in place with a metal contrast.
  • a light sensitive compound selected from the group consisting of diazonium compounds, diazo compounds, ferric ammonium oxalate, ferrie ammonium citrate and methylene blue
  • a method of producing a color photographic contrast which comprises exposing portions of a layer containing a light sensitive compound selected from the group consisting of diazonium compounds, diazo cornpounds, ferrie ammonium oxalate, ferric ammonium citrate and methylene blue, treating the exposed layer with moisture in the presence of a Water soluble salt of a metal selected from the group consisting of mercury, silver, gold and platinum to produce a latent image of one of said metals, and applying to said latent metal image a developing solution containing a reducible silver salt and an organic reducing agent capable of reducing said silver salt to silver While forming an oxidation product which yields an insoluble organic dye contrast simultaneously in place with a metal contrast.
  • a light sensitive compound selected from the group consisting of diazonium compounds, diazo cornpounds, ferrie ammonium oxalate, ferric ammonium citrate and methylene blue
  • a method of producing a color photographic contrast which comprises exposing portions of a layer containing a light sensitive compound selected from the group consisting of diazoniurn compounds, diazo compounds, ferric ammonium oxalate, ferrie ammonium citrate and methylene blue, treating the exposed layer with moisture in the presence of a Water soluble salt of a metal selected from the group consisting of mercury, silver, gold and platinum to produce a latent image of one of said metals, and applying to said latent metal image a developing solution containing a reducible salt of a metal selected from the group consisting of mercury, silver, gold and platinum and an organic reducing agent capable of reducing said salt to metal while forming an oxidation product which yields an insoluble organic dye contrast simultaneously in place With a metal contrast, and dissolving the metal contrast to leave only a color contrast.
  • a light sensitive compound selected from the group consisting of diazoniurn compounds, diazo compounds, ferric ammonium oxalate, ferrie ammonium citrate
  • a method of producing a color photographic contrast which comprises exposing to a given portion of the spectral range selected portions of a layer containing a light sensitive compound selected from the group consisting of diazonium compounds, diazo compounds, ferrie ammonium oxalate, ferrie ammonium citrate and methylene blue, treating the exposed layer with moisture in the presence of a Water soluble salt of a metal selected from the group consisting of mercury, silver, gold and platinum to produce a latent image of one of said metals, and applying to said latent metal image a developing solution containing a reducible salt of a metal selected from the group consisting of mercury, silver, gold and platinum and an organic reducing agent capable of reducing said salt to metal While forming an oxidation product which yields an insoluble organic dye contrast simultaneously in place with a metal contrast.
  • a light sensitive compound selected from the group consisting of diazonium compounds, diazo compounds, ferrie ammonium oxalate, ferrie ammonium citrate and methylene blue
  • a method of producing a multicolored photographic contrast which comprises exposing portions of a layer containing a light sensitive compound selected from the group consisting of diazoniurn compounds, dazo compounds, ferrie ammonium oxalate, ferric ammonium citrate and methylene blue, treating the exposed layer with moisture in the presence of a water soluble salt of a metal selected from the group consisting of mercury, silver, gold and platinum to produce a latent image of one of said metals, and applying to said latent metal image a developing solution containing a reducible salt of a metal selected from the group consisting of mercury, silver, gold and platinum and an organic reducing agent capable of reducing said salt to metal While forming an oxidation product which yields an insoluble organic dye contrast simultaneously iu place with a metal contrast, and dissolving the metal contrast to leave only a color contrast and then treating said layer with an additional amount of one of said light sensitive compounds and then exposing the layer and repeating the steps of the claim to form a second color contrast and a
  • a method of producing a color photographic contrast which comprises exposing portions of a layer containing a light sensitive diazonium compound, treating the exposed layer with moisture in the presence of a water soluble salt of a metal selected from the group consisting of mercury, silver, gold and platinum to produce a latent image of one of said metals, and applying to said latent metal image a developing solution containing a reducible salt of a metal selected from the group consisting of mercury, silver, gold and platinum and an organic reducing agent capable of reducing said salt to metal while forming an oxidation product which yields an insoluble organic dye contrast simultaneously in place with a metal contrast.
  • a method of producing a color photographic contrast which comprises exposing portions of a layer containing methylene blue, treating the exposed layer with moisture in the presence of a water soluble salt of a metal selected from the group consisting of mercury, silver, gold and platinum to produce a latent image of one of said metals, and applying to said latent metal image a developing solution containing a reducible salt of a metal selected from the group consisting of mercury, slver, gold and platinum and an organic reducing agent capable of reducing said salt to metal while forming an oxidation product which yields an insoluble organic dye contrast simultaneously in place with a metal contrast.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Polymerisation Methods In General (AREA)
US227564A 1950-05-26 1951-05-22 Process for producing colored photographic contrasts Expired - Lifetime US2750292A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2886435A (en) * 1953-08-21 1959-05-12 Panacolor Inc Photographic iron-silver color process
US2929709A (en) * 1951-07-10 1960-03-22 Philips Corp Photographic process
US3130052A (en) * 1959-07-27 1964-04-21 Philips Corp Method of manufacturing, by photographic agency, internal and/or external images on and/or in macromolecular supports with mercury and silver salts germ introduction baths
US3223525A (en) * 1959-07-22 1965-12-14 Philips Corp Method of manufacturing, by photographic means, external, electrically conductive noble-metal patterns on non-metallic, electrically non-conductive, macromolecular supports and products obtained by these methods
US3390989A (en) * 1964-04-15 1968-07-02 Itek Corp Methods of imaging a data storage medium
US3390988A (en) * 1962-09-14 1968-07-02 Philips Corp Method of manufacturing metallic images on aluminum and aluminum alloys
US3647450A (en) * 1967-09-14 1972-03-07 Ferrania Spa ELECTROLESS DEPOSITION OF Ni OR Co LIGHT-GENERATED Ag NUCLEI
US3867141A (en) * 1973-03-05 1975-02-18 Xerox Corp Photoelectric and electrophotographic pigments comprising derivatives of condensed polycyclic aromatic hydrocarbon aldehydes
US4002477A (en) * 1973-11-28 1977-01-11 Eastman Kodak Company Diffusion transfer processes and elements using or containing inert transitional metal complex oxidizing agents
CN113550156A (zh) * 2021-02-04 2021-10-26 浙江金昌特种纸股份有限公司 一种染料染色的棕色游龙丝的制备方法

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FR873507A (fr) * 1939-11-02 1942-07-10 Gevaert Photo Prod Nv Procédé pour l'obtention d'images au moyen d'halogénure d'argent
GB629656A (en) * 1946-09-12 1949-09-26 Gen Aniline & Film Corp Process for positive diazo-type and negative metal reproduction images and light-sensitive material therefor
US2495000A (en) * 1945-02-24 1950-01-17 Gen Aniline & Film Corp Production of azo dyestuff images from n-acyl-n-aryl hydrazine developers
US2497917A (en) * 1947-10-17 1950-02-21 Eastman Kodak Co Method of producing direct positive photographs having increased density
US2553500A (en) * 1946-08-01 1951-05-15 Gen Aniline & Film Corp Production of photographs in blue-black tones and compositions thereof
US2622025A (en) * 1947-04-03 1952-12-16 Ilford Ltd Light-sensitive photographic element and process using it

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US1375659A (en) * 1914-02-26 1921-04-19 Illig Heinrich Screen
US1744642A (en) * 1925-08-04 1930-01-21 Kondo Kenyu Manufacture of reproduced diffraction gratings
US1794693A (en) * 1929-07-11 1931-03-03 Joseph Deutsch Screen employed in photo-engraving and method for making the same
US2067690A (en) * 1930-02-05 1937-01-12 Philips Nv Method and material for obtaining photographic contrasts
US1933789A (en) * 1930-03-14 1933-11-07 Eastman Kodak Co Photographic developer for use at high temperatures
US2083285A (en) * 1933-10-09 1937-06-08 Philips Nv Carrier comprising a diazonium compound and method of obtaining contrasts
US2178771A (en) * 1934-10-10 1939-11-07 Philips Nv Light-sensitive layer and method of making same
US2150834A (en) * 1936-02-17 1939-03-14 Philips Nv Sound record and method of making same
US2183447A (en) * 1937-08-09 1939-12-12 Philips Nv Light-sensitive material and method of making the same
FR873507A (fr) * 1939-11-02 1942-07-10 Gevaert Photo Prod Nv Procédé pour l'obtention d'images au moyen d'halogénure d'argent
FR53515E (fr) * 1939-11-02 1946-03-04 Gevaert Photo Prod Nv Procédé pour l'obtention d'images au moyen d'halogénure d'argent
US2495000A (en) * 1945-02-24 1950-01-17 Gen Aniline & Film Corp Production of azo dyestuff images from n-acyl-n-aryl hydrazine developers
US2553500A (en) * 1946-08-01 1951-05-15 Gen Aniline & Film Corp Production of photographs in blue-black tones and compositions thereof
GB629656A (en) * 1946-09-12 1949-09-26 Gen Aniline & Film Corp Process for positive diazo-type and negative metal reproduction images and light-sensitive material therefor
US2622025A (en) * 1947-04-03 1952-12-16 Ilford Ltd Light-sensitive photographic element and process using it
US2497917A (en) * 1947-10-17 1950-02-21 Eastman Kodak Co Method of producing direct positive photographs having increased density

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2929709A (en) * 1951-07-10 1960-03-22 Philips Corp Photographic process
US2886435A (en) * 1953-08-21 1959-05-12 Panacolor Inc Photographic iron-silver color process
US3223525A (en) * 1959-07-22 1965-12-14 Philips Corp Method of manufacturing, by photographic means, external, electrically conductive noble-metal patterns on non-metallic, electrically non-conductive, macromolecular supports and products obtained by these methods
US3130052A (en) * 1959-07-27 1964-04-21 Philips Corp Method of manufacturing, by photographic agency, internal and/or external images on and/or in macromolecular supports with mercury and silver salts germ introduction baths
US3390988A (en) * 1962-09-14 1968-07-02 Philips Corp Method of manufacturing metallic images on aluminum and aluminum alloys
US3390989A (en) * 1964-04-15 1968-07-02 Itek Corp Methods of imaging a data storage medium
US3647450A (en) * 1967-09-14 1972-03-07 Ferrania Spa ELECTROLESS DEPOSITION OF Ni OR Co LIGHT-GENERATED Ag NUCLEI
US3867141A (en) * 1973-03-05 1975-02-18 Xerox Corp Photoelectric and electrophotographic pigments comprising derivatives of condensed polycyclic aromatic hydrocarbon aldehydes
US4002477A (en) * 1973-11-28 1977-01-11 Eastman Kodak Company Diffusion transfer processes and elements using or containing inert transitional metal complex oxidizing agents
CN113550156A (zh) * 2021-02-04 2021-10-26 浙江金昌特种纸股份有限公司 一种染料染色的棕色游龙丝的制备方法

Also Published As

Publication number Publication date
GB735424A (en) 1955-08-24
BE503489A (fr)
NL85806C (fr)
DE929171C (de) 1955-06-20
FR1044725A (fr) 1953-11-20
CH301839A (de) 1954-09-30

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