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
  • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
  • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
  • G03C5/29—Development processes or agents therefor
  • G03C5/305—Additives other than developers
  • G03C5/3056—Macromolecular additives
• • 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
  • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
  • G03C7/3046—Processing baths not provided for elsewhere, e.g. final or intermediate washings

Definitions

• This application relates to the treatment of water permeable hydrophilic colloids.
• this invention relates to the processing of photographic elements.
• this invention relates to the final rinse in the processing of photographic film.
• this invention relates to the processing of perforated photographic film products, especially color film products, in which the final wet processing step desirably is a rinse in a solution consisting essentially of water and surfactant.
• compositions containing a speci- -present invention are those siloxanes containing:
• (b) b has a value from 2 to 3 inclusive;
• R is a methyl or an ethyl group
• R is an alkyl group containing from 1 to 4 carbon atoms inclusive (i.e., a methyl, ethyl propyl, or butyl p);
• n has an average value from about 4 to 14 inclusive
• n-l-p has a value from about 4 to 17 inclusive (preferably from 4 to 12 inclusive);
• the alkoxypoly(ethyleneoxy) group is attached to the silicon atom of Formula I through at least two carbon atoms of the C H group;
• the -C H (OC H (OC H OR group makes up from 57.5 to 72.5 average weight percent, advantageously -60 to 70 percent of the total structure or the total structure has an average silicon content of 10 to 15 weight percent, advantageously 11 to 14 percent.
• siloxanes are often mixtures whose average composition can be represented by Formulae I and II above, wherein n and p can have fractional values.
• siloxanes are readily prepared by an addition reaction between a hydrosiloxane (i.e., a siloxane containing silicon-bonded hydrogen) and an alkenyl ether (e.g., a vinyl, allyl, or methallyl ether) of an alkoxy and hydroxy end-blocked poly(ethylene-oxide) as disclosed in the Bailey U.S. Pat. 3,299,112, filed June 19, 1964.
• a hydrosiloxane i.e., a siloxane containing silicon-bonded hydrogen
• an alkenyl ether e.g., a vinyl, allyl, or methallyl ether
• the reaction conditions employed in addition reactions of this type are well known in the art and in general involve heating the reactants (e.g., at a temperature of from about 85 C. to 110 C.) in the presence of a platinum catalyst (e.g., chloroplatinic acid) and a solvent (e.g., toluene).
• R is a lower alkyl, especially methyl or ethyl, are remarkably effective when utilized in accordance with our invention.
• the bath of the present invention may be used in such a manner, it is particularly well adapted to be utilized in a system and with a photographic film adapted for a final rinse consisting essentially of water and siloxane.
• the siloxanes may be present in widely varying quantities, the specific concentration depending upon the particular siloxane chosen, the processing equipment, water hardness, and the element selected for processing.
• concentration should be maintained at a sufiiciently low level to avoid a substantial carry-over in automated equipment where equipment is recycled, or in any processor where equipment might be contacted by siloxane and subsequently contacted by another processing solution, e.g., developer. If, for example, the carry-over to another processing solution results in a concentration of over 1 ml. siloxane per liter of solution, sensitometric changes are noted in some photographic products. Such a concentration does, however, represent an extremely large carry-over.
• Utilizing the final rinse bath according to the present invention results in processed film products substantially free from water spots and scum especially when utilized with well-known color systems, for example, as disclosed in Mannes et al. U.S. Pat. 2,252,718, wherein the photographic element comprising a support superposed with a red-sensitive silver-halide emulsion layer, a greensensitive silver-halide emulsion layer, a bleachable yellow filter layer, and a blue-sensitive silver-halide layer is image exposed and then processed.
• Color reversal processing involves a negative silver image development, washing, selective re-exposure of the bottom red-sensitive layer, cyan development of that layer with an alkaline solution containing a color developing agent and a cyanforming coupler, washing, selective re-exposure of the blue-sensitive layer with an alkaline solution containing a color developing agent, and a yellow-forming coupler, washing, fogging and magenta development of the greensensitive layer with an alkaline solution containing a color developing agent and a magenta-forming coupler, washing, followed by treatment with a potassium ferricyanide bleach bath, a sodium thiosulfate fix, washing and drying.
• Color processing of these elements usually involves the simultaneous color development of the three silver-halide emulsion layers with an alkaline solution containing a color developing agent, washing, hardening, washing, treatment with a potassium ferricyanide bleach bath, a sodium thiosulfate fix, washing and drying.
• EXAMPLE 1 Two hundred 38 in. x 35 mm. strips of a standard perforated multilayer color film material having respectively superposed on a film support a red-sensitive layer containing cyan dye-forming couplers, a green-sensitive layer containing magenta dye-forming couplers, a bleachable yellow filter layer and a blue-sensitive layer containing yellow dye-forming couplers, which are exposed to a test pattern, are processed in accordance with general procedures on a 34 KO Pako Filmachine, a standard processing machine. Auxiliary heaters are supplied to raise the drying temperature to above 120 F. One hundred strips are processed utilizing a standard final rinse as disclosed in Henn et a1. U.S. Pat.
• 2,556,540 (a water solution containing surfactant and solvent). After drying under severe conditions these strips have a total of about 1,110 spots (11.1 per strip average) and contain streaks of processing scum.
• the other strips are processed in an identical manner except that the final rinse is an aqueous solution of 1.66 ml. siloxane (prepared in accordance with Example 1 of U.S. Pat. 3,299,112) per liter of water. After the same severe drying conditions these strips have a total of 10 spots (0.1 per strip). The latter 100 strips material show excellent dye stability characteristics. There is very little indication of processing scum and the film appears somewhat water repellant.
• Example 5 The procedure according to Example 5 is followed except that the siloxane composition has an average molecular weight of about 550-650 and a silicon content indicated to be about percent by weight (about percent by weight siloxy). Similar results are obtained.
• EXAMPLE 7 The procedure according to Example 5 is followed except that the siloxane composition is indicated on elemental analysis to have a silicon content of about 9 percent (about 25 percent by weight siloxy).
• the siloxane composition when diluted with water as in Example 1 does not operate satisfactorily as a final rinse for photographic products having gelatin strata.
• EXAMPLE 8 The procedure according to Example 5 is followed except that the siloxane composition is indicated on elemental analysis to be about 16 percent by weight silicon. Attempts to utilize this composition in a final rinse for gelatin-containing photographic products indicate the composition to be unsatisfactory.
• EXAMPLE 9 A procedure according to Example 1 is followed except that the drying temperature is adjusted to 170 F. to provide a drying condition of increased severity. Thirty-two strips are tested, 8 in each of the indicated baths. The results are as follows:
• compositions used in accordance with the present invention oifer additional advantages when compared to other surfactant solutions.
• the compositions used in accordance with the instant invention are, inter alia, relatively photographically inactive, of low toxicity, nonvolatile, difficult to ignite, noncorrosive, free from acidproducing chemicals, chemically inert, not subject to change by oxidation or' heat, and low foaming.
• the solutions used according to our invention have decreased scumming characteristics as the concentration of siloxane is increased. Additionally, the specified siloxanes form true dispersions in water and thus will not settle out on standing.
• a method for processing exposed photographic film comprising a transparent support having thereon at least one coating comprising water permeable hydrophilic colloid, said method comprising developing the film; bleaching the developed film; fixing the bleached film; rinsing the film; and drying the fihn: the improvement comprising rinsing said film in an aqueous solution comprising about .1 to about 5 ml. per liter of siloxane having (A) one alkoxypoly(ethyleneoxy)siloxane group and (B) from 1 to 4 methyl siloxane groups, a molecular weight of about 300 to about 1,000 and containing about 10 to about 15 weight percent silicon.
• a method of processing exposed photographic film comprising a transparent support having thereon at least one coating comprising gelatin, said method comprising subjecting said film to a series of processing steps to develop and fix an image thereon, said method including steps of rinsing said film and then drying said film: the improvement comprising rinsing said film in an aqueous solution comprising about .1 to about 5 ml. per liter of a siloxane to prevent spotting on said film, said siloxane having the general formula of claim 2.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Spectroscopy & Molecular Physics (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)
• Silicon Polymers (AREA)
• Detergent Compositions (AREA)
• Compositions Of Macromolecular Compounds (AREA)

Applications Claiming Priority (1)

Publications (1)

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Cited By (9)

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Citations (3)

• 1968
  • 1968-04-29 US US725147A patent/US3545970A/en not_active Expired - Lifetime
• 1969
  • 1969-04-24 GB GB1259189D patent/GB1259189A/en not_active Expired
  • 1969-04-25 FR FR6913182A patent/FR2007178A1/fr active Pending
  • 1969-04-25 BE BE732157D patent/BE732157A/xx not_active IP Right Cessation
  • 1969-04-28 JP JP44033196A patent/JPS4946262B1/ja active Pending
  • 1969-04-28 SE SE05985/69A patent/SE361532B/xx unknown
  • 1969-04-28 BR BR208409/69A patent/BR6908409D0/pt unknown
  • 1969-04-29 NL NL6906647A patent/NL6906647A/xx unknown
  • 1969-04-29 CH CH654869A patent/CH515531A/fr not_active IP Right Cessation
• 1970
  • 1970-08-18 NO NO03146/70A patent/NO127942B/no unknown

Patent Citations (3)

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