Lower alkyl lactate coupler solvents

Claim 1

THE METHOD OF INCORPORATING IN A LIGHT-SENSITIVE GELATIN SILVER HALIDE EMULSION, A COLOR FORMER FAST TO DIFFUSION AND CAPABLE OF FORMING UPON COLOR DEVELOPMENT WITH A PRIMARY AROMATIC AMINO DEVELOPING AGENT, A DYE IMAGE SELECTED FROM THE CLASS CONSISTING OF AZOMETHINE, INDOANILINE AND PHENAZONIUM DYE IMAGES, SAID COLOR FORMER CONTAINING A BENZIMIDAZOLE NUCLEUS CONNECTED THROUGH ITS CARBON ATOM IN THE 2-POSITION TO THE RESIDUE OF THE COLOR FORMING MOLECULE WHICH IS REACTIVE WITH THE OXIDATION PRODUCT OF A PRIMARY DEVELOPING AGENT AND WHICH CONTAINS A REACTIVE GROUP SELECTED FROM THE CLASS CONSISTING OF A REACTIVE METHYLENE, ETHENOL AND PHENOLIC HYDROXY GROUP, SAID BENZIMIDAZOLE NUCLUES BEING SUBSTITUTED ON ONE OF THE NITROGEN ATOMS BY AN ALIPHATIC HYDROCARBON RADICAL CONTAINING AT LEAST 10 CARBON ATOMS AND SUBSTITUTED IN THE BENZENE PORTION BY A WATER SOLUBILIZING GROUP WHICH COMPRISES DISSOLVING 10 PARTS BY WEIGHT OF A SAID COLOR FORMER IN FROM 5 TO 45 PARTS BY WEIGHT OF A LOWER ALKYL LACTATE IN WHICH SAID ALKYL GROUP HAS FROM 1 TO 3 CARBON ATOMS, DILUTING THE RESULTANT SOLUTION WITH AN AQUEOUS SOLUTION CONTAINING A SURFACE ACTIVE AGENT, THE AMOUNT OF AQUEOUS SOLUTION RANGING FROM 2 TO 8 PARTS BY WEIGHT PER PART OF ALKYL LACTATE, AND THEN ADDING THE RESULTANT DISPERSION TO THE LIQUID GELATIN SILVER HALIDE EMULSION PRIOR TO COATING IT UPON A SUITABLE SUPPORT.

Claim 2

THE METHOD OF INCORPORATING IN A LIGHT-SENSITIVE GELATIN SILVER HALIDE EMULSION, A COLOR FORMER FAST TO DIFFUSION AND CAPABLE OF FORMING UPON COLOR DEVELOPMENT WITH A PRIMARY AROMATIC AMINO DEVELOPING AGENT, A DYE IMAGE SELECTED FROM THE CLASS CONSISTING OF AZOMETHINE, INDOANILINE AND PHENAZONIUM DYE IMAGES, SAID COLOR FORMER CONTAINING A BENZIMIDAZOLE NUCLEUS CONNECTED THROUGH ITS CARBON ATOM IN THE 2-POSITION TO THE RESIDUE OF THE COLOR FORMING MOLECULE WHICH IS REACTIVE WITH THE OXIDATION PRODUCT OF A PRIMARY DEVELOPING AGENT AND WHICH CONTAINS A REACTIVE GROUP SELECTED FROM THE CLASS CONSISTING OF A REACTIVE METHYLENE, ETHENOL AND PHENOLIC HYDROXY GROUP, SAID BENZIMIDAZOLE NUCLUES BEING SUBSTITUTED ON ONE OF THE NITROGEN ATOMS BY AN ALIPHATIC HYDROCARBON RADICAL CONTAINING AT LEAST 10 CARBON ATOMS AND SUBSTITUTED IN THE BENZENE PORTION BY A WATER SOLUBILIZING GROUP WHICH COMPRISES DISSOLVING 10 PARTS BY WEIGHT OF A SAID COLOR FORMER IN FROM 5 TO 45 PARTS BY WEIGHT OF A LOWER ALKYL LACTATE IN WHICH SAID ALKYL GROUP HAS FROM 1 TO 3 CARBON ATOMS, DILUTING THE RESULTANT SOLUTION WITH AN AQUEOUS SOLUTION CONTAINING A SURFACE ACTIVE AGENT, THE AMOUNT OF AQUEOUS SOLUTION RANGING FROM 2 TO 8 PARTS BY WEIGHT PER PART OF ALKYL LACTATE, AND THEN ADDING THE RESULTANT DISPERSION TO THE LIQUID GELATIN SILVER HALIDE EMULSION PRIOR TO COATING IT UPON A SUITABLE SUPPORT.