| 摘要 |
<p>An aqueous, homogeneous, single-part color developing concentrate comprises a color developing agent in free base form and an N,N-dialkyl- or N,N-diarylhydroxylamine antioxidant that has at least one solubilizing substituent. The concentrate also includes a water-miscible or water-soluble organic co-solvent that has a molecular weight of from 100 to 400, is present in the concentrate at a concentration such that the weight ratio of water to the organic co-solvent is from 7:1 to 30:1, and is represented by the following Structure I: Y-Z<->M<+> (I) wherein Y is uncharged in the pH range of from 10 to 11 and is an alkyl group having 4 to 16 carbon atoms, a cycloalkyl group having 5 to 10 carbon atoms in the ring, an alkylene group having 1 to 6 carbon atoms that is additionally substituted with a cycloalkyl group, a carbocyclic aryl group or a heterocyclic group containing 1 to 3 hetero atoms, or a carbocyclic aryl group having 6 or 10 carbon atoms in the ring, Z<-> is a monovalent group comprising a single negative charge or an acidic group that is ionized to a single negative charged group at pH of 10 or more, and M<+> is a monovalent cation. The concentrate can be used to make a working strength processing solution, or it can be used as a replenishing composition with proper dilution, and is particularly useful for processing color negative or color reversal photographic silver halide films.</p> |
