Compact color photographic developer concentrate and solid component therefor
AssigneesFuji Hunt Photographic Chemicals, Inc., Fuji Photo Film Co., Ltd.
InventorsYue Chen, Akira Abe
Life of this patent
Estimating the term…
Abstract
A compact developer concentrate composition for color photographic development that has a reduced number of parts is described. The compact developer concentrate composition includes a concentrate and a coated solid. The coating of the solid remains insoluble in the concentrate, but is easily dissolved upon mixing with water to prepare a replenisher and/or working strength developer. The compact developer concentrate composition is stable, compact, easy to use, has good water solubility upon dilution with water, minimizes mixing errors, and remains free of degradation during long-term storage. A method of processing image-wise exposed photographic color silver halide emulsions using the developer concentrate composition is also provided.
Claims33
A color developer concentrate composition comprising:
- a concentrate comprising water and at least one color developer chemical;
- and
- a solid comprising at least one color developer chemical wherein the solid is isolated from the concentrate by a coating insoluble in the concentrate but readily soluble when diluted with water to prepare a replenisher or working strength developer.
A color developer concentrate composition comprising:
- a concentrate comprising water and at least one color developer chemical;
- and
- a solid comprising at least one color developer chemical wherein the solid is isolated from the concentrate by a coating insoluble in the concentrate but readily soluble when diluted with water to prepare a replenisher or working strength developer,
- wherein the coating comprises an alkali metal sulfate.
A process for developing color negative film, the process comprising:
- diluting a color developer concentrate composition in water up to an amount of about 8% (w/w) to form a working strength developer;
- and
- processing the exposed photosensitive material with the working strength developer wherein the color developer concentrate composition comprises:
- a concentrate comprising water and at least one color developer chemical;
- and
- a solid comprising at least one color developer chemical wherein the solid is isolated from the concentrate by a coating insoluble in the concentrate but readily soluble when diluted with water to prepare the working strength developer.
A process for developing color negative film, the process comprising:
- diluting a color developer concentrate composition in water up to an amount of about 8% (w/w) to form a working strength developer;
- and
- processing the exposed photosensitive material with the working strength developer wherein the color developer concentrate composition comprises:
- a concentrate comprising water and at least one color developer chemical;
- and
- a solid comprising at least one color developer chemical wherein the solid is isolated from the concentrate by a coating insoluble in the concentrate but readily soluble when diluted with water to prepare the working strength developer,
- wherein the coating comprises an alkali metal sulfate.
Dependencies are inferred from the claim text.