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
  • G03C8/00—Diffusion transfer processes or agents therefor; Photosensitive materials for such processes
  • G03C8/02—Photosensitive materials characterised by the image-forming section
  • G03C8/04—Photosensitive materials characterised by the image-forming section the substances transferred by diffusion consisting of inorganic or organo-metallic compounds derived from photosensitive noble metals
  • G03C8/06—Silver salt diffusion transfer
• • 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
  • G03C5/30—Developers
  • G03C5/3014—Hydrazine; Hydroxylamine; Urea; Derivatives thereof

Definitions

• R represents an alkyl group, an alkoxyalkyl group, an alkoxyalkoxyalkyl group, an alkenyl group or a tetrahydrofurfuryl group.
• This invention relates to a developer for lightsensitive silver halide materials and, more particularly, it is concerned with a developer for the silver salt diffu sion transfer photography, which uses a new compound as a developing agent.
• the developer used in such a silver salt diffusion transfer photographic process contains a developing agent, a silver halide solvent and an alkali as essential components.
• hydroxy amines have hitherto been used often as a developing agent. This is due to an advantage that even if a hydroxy amine, contained in the receiving layer after the processing, is oxidized, the oxidized product is substantially colorless and the resulting image is not spoiled thereby.
• the present invention provides a developer for diffusion transfer photography, which comprises an alkali, a silver halide solvent and a compound represented by the following general formula,
• R represent an alkyl group, an alkoxyalkyl group, an alkoxyalkoxyalkyl group. an alkenyl group or a tetrahydrofurfuryl group.
• the number of carbon atoms of R is not particularly limited, and any compound can preferably be used in which about lg or more is soluble in 100g of an about 5 weight aqueous solution of alkali. In general, 1 to 4 carbon atoms are preferred for R.
• R is an alkyl group such as a methyl, ethyl, propyl or butyl group, an alkoxyalkyl group such as a methoxymethyl, ethoxymethyl, methoxyethyl or ethoxyethyl group, an alkoxyalkoxyalkyl group such as a methoxymethoxymethyl or methoxymethoxyethyl group.
• an alkcnyl group such as an allyl group or a tetrahydrofurfuryl group.
• N-Ethyl-Ntetrahydrofurfurylhydroxylamine 2. N-n-Butyl-N-tetrahydrofurfurylhydroxylamine 3. N-Methoxyethyl-N-tetrahydrofurfurylhydroxylamine 4. N-Ethoxyethyl-N-tetrahydrofurfurylhydroxylamine 5. N-Allyl-N-tetrahydrofurfurylhydroxylamine 6.
• N,N-Ditetrahydrofurfurylhydroxylamine These compounds can be synthesized by oxidizing a corresponding secondary amine such as N-ethyl-N-tetrahydrofurfurylamine, N-n-butyl-N-tetrahydrofurfurylamine, N-allyl-N-tetrahydrofurfuryl-amine, etc., with a suitable oxidizer, for example, hydrogen peroxide or an organic peracid such as peracetic acid or perbenzoic acid.
• Suitable solvents which can be used are water or alcohols such as methanol, ethanol, propanol or butanol, etc.
• the oxidizing agent preferably a lower alcohol is employed.
• the amine concentration suitably ranges from 5 to 50 wt preferably 20 to 40 wt
• a suitable molar ratio of amine to oxidizing agent which can be used is 0.2:1 to 2:1.
• the reaction is generally conducted at a temperature of about 5 to C., preferably 40 to 50C, with a reaction time of about 10 minutes to 10 hours, preferably 1 to 2 hours.
• These developing agents can be used alone or in admixture and, preferably, in a proportion of about 0.5 to 35% by weight, more preferably 2 to by weight, based on the developer used.
• any of the conventional silver halide solvents as disclosed in U.S. Pat. Nos. 2,603,565 and 2,857,274 can be used, for example, thiosulfates such as sodium thiosulfate, potassium thiosulfate and ammonium thiosulfate, thiocyanates such as potassium thiocyanate and ammonium thiocyanate, thiourea, and thioglycolic acid.
• silver halide solvents examples include cyclic imide compounds such as cyanuric acid, barbituric acid, uracil, 4-methyluracil, urazole, hydantoin and succinimide and amine compounds such as ethylamine, diethylamine, triethanolamine, monoethanolamine, ethylenediamine and aminoethylethanolamine.
• a sulfur-free nitrogen-containing compound is used for the developer of the invention, an image obtained after the processing is less contaminated with the passage of time.
• These silver halide solvents can be used alone or in admixture and, preferably, in a proportion of about l to 40% by weight, particularly, about 5 to based on the developer.
• alkali metal hydroxides such as sodium hydroxide and potassium hydroxide
• the pH of the developer is 10 or higher, preferably, 12 or higher.
• Other known alkalis can be used than the above described alkali metal hydroxides, but alkali metal hydroxides are preferred from the standpoint of controlling the pH.
• a viscosity increasing agent is preferably incorporated in the developer of the invention, so that the developer can readily and uniformly be spread between the silver halide emulsion and the receiving material. Examples of such are disclosed in U.S. Pat. Nos. 2,603,565 and 2,759,825.
• Illustrative viscosity increasing agents are methyl cellulose, hydroxyethyl cellulose and carboxymethyl cellulose. These compounds can be used alone or in admixture in such a manner that the viscosity of the developer is about 1000 to 20000cp at C.
• toning agents various additives such as toning agents, fog inhibitors and antioxidants can be incorporated in the developer of the invention.
• toning agent any of the compounds which have conventionally been used for diffusion transfer photography as disclosed in U.S. Pat. Nos. 2,987,396, 3,053,657; 3,160,560 and 3,577,240, for example, 1-phenyl-5-mercaptotetrazole, 5-mercapto-2-mercapto-l,3,4-thiadiazole and the triazole compounds described in Japanese Patent Publication No.
• zinc or a zinc compound can be incorporated in the developer ofthe invention as the occasion demands, for the purpose of easily and completely separating the silver halide emulsion layer and the receiving layer as disclosed in U.S. Pat, No. 3,295,972.
• Illustrative of the zinc compound are zinc chloride, zinc oxide, zinc hydroxide, zinc sulfate and zinc carbonate.
• other known stripping agents can be used.
• zinc compounds are preferred and preferably are used in a proportion of about 7 X 10' to 0.3 mol, particularly, 7 X 10 to 0.15 mol, per g of the developer.
• silver halide of the silver halide emulsion which can be treated with the developer of the invention together with the receiving material
• silver chloride, silver bromide, silver chlorobromide, silver iodobromide and silver chloroiodobromide which are well known in the art
• various additives may be incorporated such chemical sensitizers as disclosed in U.S. Pat. Nos. 2,399,083; 2,540,085; 2,597,856; 2,597,915;
• the receiving material comprises a receiving layer on a suitable support, for example, a baryta paper or a polyethylene- 0r polystyrenelaminated paper.
• the receiving layer comprises a dispersion of silver precipitating nuclei in a natural or synthetic resin or a mixture thereof, for example, as disclosed in US, Pat. No. 3,607,269.
• known materials can be used, for example, the metal sulfides, the metal selenides, the metal thioxalates, the metal thioacetamides and the colloidal metals as described in U.S. Pat. No. 2,698,237.
• a special receiving material can preferably be used which is prepared by providing a support at least the surface of which consists of a cellulose organic acid ester, hydrolysing the organic acid ester to render the surface alkali permeable and incorporating therein the silver precipitating nuclei as disclosed in U.S. Pat. No. 3,607,269.
• the developing agent represented by the foregoing general formula, used in the developer of the invention is substantially free from any unpleasant odors such as fishey odors and has a higher solubility in an aqueous alkali solution as compared with known hydroxy amines, such as N-N-diethylhydroxylamine and N,N- dimethoxyethylhydroxylamine. Therefore, the developer of the invention does not emit an unpleasant odor and provides an image having a desirable density and gradation through diffusion transfer development.
• aqueous solution of gelatin was coated onto the silver iodobromide layer to provide a thickness of 0.5 micron on a dry basis as a protective layer and then dried. 4. Development The receiving material was superimposed on the emulsion surface of the imagewise exposed silver halide light-sensitive material and between them, a developer having the composition as shown in Table l was spread in a thickness of microns.
• Table 1 Developer Compound A Water 700 700 N-Ethyl-N-tetrahydrofurfurylhydroxylamine 32 NEthoxyethyl-N-tetrahydrofurfurylhydroxylaminc 35 Uracil 82 82 Aminoethylethanolamine 4 4 Sodium Hydroxide 5 5 Hydroxyethyl Cellulose” 30 30 Zinc Hydroxide 5 5 1% by weight aqueous solution-viscosity at 25C of 501) up: Degree of substitution. 2.5
• the developer was prepared by mixing these compounds in a stream of nitrogen. After the developer was spread, the silver halide light-sensitive material and receiving material were stripped respectively after 20 seconds and 40 seconds.
• the reflection density at the maximum density (Dmax) and the color tone of an image thus obtained on the receiving material are shown in Table 2.
• the measurement of the reflection density was carried out using a P-type Densitometer made by the Fuji Photo Film Co., Ltd.
• the Developers A and B are transparent solutions free from a fishey odor. As is evident from the results in mula,
• R represents an alkyl group, an alkoxyalkyl group, an alkoxyalkoxyalkyl group, an alkenyl group or a tetrahydrofurfuryl group.
• alkyl group is a methyl group, an ethyl group, a propyl group or a butyl group, wherein said alkoxyalkyl group is a methoxymethyl group, an ethoxymethyl group, a methoxyethyl group, or an ethoxyethyl group, wherein said alkoxyalkoxyalkyl group is a methoxymethox- N-allyl-N- or MN- amount of from about 0.5 to 35% by weight, based on N-ethoxyethyl-N- the weight of said developer.
• said alkali is an alkali metal hydroxide.
• said silver halide sol- ,vent is a thiosulfate, a thiocyanate, thiourea, thioglycolic acid, a cyclic imide compound, or an amine.
• said developer includes at least one of a viscosity increasing agent, a toning agent, a fog inhibitor. an antioxidant, and zinc or a zinc compound.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• Inorganic Chemistry (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)
• Furan Compounds (AREA)

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Cited By (2)

Citations (2)

• 1972
  • 1972-12-25 JP JP73259A patent/JPS5514419B2/ja not_active Expired
• 1973
  • 1973-12-21 GB GB5950373A patent/GB1403690A/en not_active Expired
  • 1973-12-24 DE DE2364633A patent/DE2364633A1/de not_active Ceased
  • 1973-12-26 US US427878A patent/US3864131A/en not_active Expired - Lifetime

Patent Citations (2)

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