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
  • G03C1/64—Compositions containing iron compounds 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
  • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
  • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
  • G03C5/40—Chemically transforming developed images

Definitions

• the present invention relates to the photographic production of monochrome and plurichrome pictures by means of light sensitive ferric salt layers and is characterized by the fact that at one stage or another of the inherent procedure silver salts are brought into play resulting in the formation of silver images, the latter being afterwards transformed or converted into colored compounds or ,used to form colored compounds by way of accessory reactions.
• the iron salts are only intermediary means, while the color formations are truly based entirely on silver.
• An object of the invention is to providean inexpensive, simple, rapid and fool-proof method of color picture production, and especially one which is compatible with the conditions obtaining in processing laboratories handling moving picture film.
• ferric salt sensitizers fulfill at one and the same time all these conditions, with the added advantage that the ultimate pictures obtained thereby are practically without any grain, or at least of an extreme fineness of grain compared to other multicolor pictures produced in any other way.
• Ferric salts require, it is true, a powerful source of light in exposure, but modern technical means are available that quite serve .the purpose; and, furthermore, exposure can be effected during continuous travel of moving picture film and thus the exposure may be considered as a step in the processing sequence, just the same as coating, eliminating'thereby separate operation exposure, so called printing. 1
• Ferric salts are preferably used in water solutions, which can be compounded with suitable media as gelatine and other colloids, gums, viscose and any other suitable media, or can be applied plain to a support previously I 2,886,435 Patented : May 12,1959
• a colloid layer coated with a colloid layer or composed of or surfaced with a porous water-absorbent or water-adsorbent substance, such as paper, fabrics, regenerated cellulose, spongy-texture rubber, suitable plastic. compounds, natural and artificial resins, cellulosic esters, etc.
• a silver salt may be applied to the layer after exposure.
• the layers'so sensitized print-out in rich dark brown to black, and they only need afirst rinse in water for 1 minute, then about 1 minute fixing in 15% hypo, then a 5 minute wash.
• the silver image so obtained is then treated in any of' the: known ways whereby color pictures can be obtained-namely by bleaching and color-development, oxidation and reduction processes, toning, dye toning, ozobrome, dye imbibition, and the like.
• color pictures can be obtained-namely by bleaching and color-development, oxidation and reduction processes, toning, dye toning, ozobrome, dye imbibition, and the like.
• ferric-salt sensitizers intended to be treated with a silver solution after exposure: l
• the material After exposure, in each case the material is immersed directly for 30 seconds up to 1 minute in a l to 2% silver nitrate solution in distilled water.
• An improved silver nitrate solution for the purpose is:
• the silver image so obtained is thereafter treated, as I n previous cases, s as to yield a coloreclimage in any known suitable way.
• Gelatine layers seem endowed 1 of an infinite capacity to absorb and adsorb ferric ions time and again over and over repeatedly, almost endlessly. I have actually sensitized and resensitized the same piece of a fixed-out moving picture filmas many as eight times, with the production of a good strong image in every case, resulting in as many as eight images on the same film area.
• a22% solution of the same salt may be used, and in a third impregnation the saturation may then be 30% and should be preferably added with up to 2% gelatine.
• exposures may be equalized, standardized or corrected, as the case may be, having. in mind also that the difierent elements of a set of color separation negatives may be of varied overall density so as to require adjustment.
• the ferric salts permeate to any part of thelayer in which impregnable colloid is still free or partly free for instance also, in part, underneath a previously formed image. Everywhere the ferric salts so penetrate an image is thereafter formed.
• my resulting pluricolorirnages are not produced in stratifications but really are composed of efiective mixture of images, which, in projection, focus all on the same plane.
• Example I Step A-Cellulid film coated with plain gelatine (as may be obtained for instance, by fixing out and Washing well a positive film acquired on the market) is immersed for 1 minute in a solution made up of distilled water 100 cc., and 15 gr. of ferric ammonium oxalate. None else is strictly necessary. The film is then dried in a current of warm air, which takes only another minute.
• Step 2. Exp'ose the coated film under the green filter negative of a color separation set to a strong light rich in ultra violet rays, which will require, according to the strength of the light unit and the density of the negative, from one to three seconds.
• Step 3 Immerse for thirty (30) seconds ina 2% silver nitrate solution with sufiicicnt ammonia added to dissolve the brown precipitate first formed and then add 0.15 gr. of sodium sulphite and 0.10 gr. of borax. Rinse 1 minute, fix in 15 to 20% hypo 1 minute, wash 4 minutes.
• Step 5 Immerse in a color developer compounded as follows: 100 cc. of a sodium carbonate 2% water solution containing also 0.50% sodium sulphite: add to it 2 cc. of a 5% solution of diethyl-p-phenylene diamine hydrochloride in methyl alcohol, and 2 cc. of a 2% solution of p-nitro benzyl cyanide in equal parts of acetone and methyl alcohol. In 2 to 5 minutes the desired magenta image is formed. Wash 2 minutes, bleach 2 minutes in same bleacher of step 4, rinse, fix 2 minutes in 15% hypo, wash 4 minutes.
• Step 6 Wipe off surface moisture (no need to dry) then immerse again (the same material) in sensitizer exactly as in Step 1 and dry correspondingly.
• Step 7. Expose again the same material, so re-sensitized, with the magenta image in register with the red filter negative of the separation set.
• Step 10 -Repeat step 5 with the only modification that, instead of the p-nitro benzyl cyanide solution mentioned, the same quantity (2 cc.) of a 5% solution of phenyl phenol sodium salt in methyl alcohol is employed. All operations as in the corresponding step. A cyan image results, on top of the magenta previously formed.
• Step 13.Repeat step 8 ( 3).
• Step 14.Repeat step 9 ( 4).
• Example II A release positive unexposed film is printed in normal way under a green-filter negative of a separation set and developed fixed and washed in normal way as in black and white procedure.
• the silver image is bleached in a suitable bleacher,.then washed, and then all the steps from 5 on are applied as in Example I.
• Example 111 A release positive unexposed film is printed in normal Way under a green-filter negative of a separation set and then directly color-developed in magenta in a known way, freed from silver also in known way, and finally washed. Then all steps from 6 on are applied as in Example I.
• Duplicator materials i.e. coated with plain gelatin or with silver halide emulsions on both sides, can be utilized, with resultant shortening of the overall procedure inasmuch as sensitizing baths and other general baths would then operate at one and the same time on both sides, applicators being resorted to only when diiferentiation of agency (different color coupler) is demanded on each face.
• agency different color coupler
• a process of producing colored picture film which comprises carrying out at least once the sequence of steps comprising: sensitizing a film with a solution consisting of water and ferric ammonium oxalate, exposing 2,sse,4ss
• the sensitized film to light rich in the spectral region of the ultraviolet through one of a set of color separation negatives, treating the exposed film with a solution of silver nitrate to produce a visible metallic silver image, bleaching said silver image into a silver salt image, redeveloping said silver salt image with a color developer in the presence of a coupler to produce a dye image and a silver image in situ therewith, and removing said silver image.
• a process for producing colored picture film which comprises carrying out at least once the sequence of steps comprising: sensitizing a film with a solution conslsting of water and a ferric ammonium double salt, exposing the sensitized film with light rich in the spectral region of the ultraviolet through one of a set of color separation negatives, treating the exposed film with a solution of a silver salt to produce a visible metallic silver image, bleaching said silver image into a silver salt image, redeveloping said silver salt image with a color developer in the presence of a coupler to produce a dye image and a silver image in situ therewith, and removing the silver image.

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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)

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Citations (12)

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• 0
  • BE BE531295D patent/BE531295A/xx unknown
• 1953
  • 1953-08-21 US US375833A patent/US2886435A/en not_active Expired - Lifetime
• 1954
  • 1954-08-13 GB GB23632/54A patent/GB770959A/en not_active Expired
  • 1954-08-19 FR FR1111128D patent/FR1111128A/fr not_active Expired
  • 1954-08-20 DE DEM24210A patent/DE1004047B/de active Pending
  • 1954-08-21 CH CH332166D patent/CH332166A/de unknown

Patent Citations (12)

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