Tanning development

Claim 2

IN A PROCESS FOR PRODUCING A RELIEF IMAGE IN AN IMAGEWISE EXPOSED LIGHT-SENSITIVE GELATINO SILVER HALIDE EMULSION LAYER, THE IMPROVEMENT WHICH COMPRISES SUBJECTING SAID LAYER TO TANNING DEVELOPMENT WITH HYDROQUINONE TO FORM HARDENED AND NON-HARDENED AREAS, SAID TANNING DEVELOPMENT BEING CARRIED OUT IN THE PRESENCE OF A HARDENING INHIBITING COMPOUND SUBSTANTIALLY FREE OF SILVER HALIDE DEVELOPING ACTIVITY AND SELECTED FROM THE GROUP CONSISTING OF (A) AN AROMATIC HYDROXY COMPOUND OF THE GROUP CONSISTING OF A NAPHTHOL AND A POLYHYDROXY BENZENE HAVING AT LEAST TWO HYDROXYL GROUPS IN META POSITION RELATIVE TO ONE ANOTHER, AND (B) A WATER-SOLUBLE PRIMARY AMINO COMPOUND OF THE GROUP CONSISTING OF A LOWER ALIPHATIC PRIMARY AMINE, AN AMINO CARBOXYLIC ACID, AND AN AMINO SULFONIC ACID; AND REMOVING AT LEAST A PORTION OF THE EMULSION IN THE UNHARDENED AREAS THEREOF TO PRODUCE SAID RELIEF IMAGE.

Claim 3

LIGHT-SENSITIVE PHOTOGRAPHIC MATERIAL FOR IMAGE WISE EXPOSURE WITH LIGHT AND DEVELOPMENT IN AN AQUEOUS ALKALINE LIQUID COMPRISING AT LEAST ONE SILVER HALIDE EMULSION LAYER AND HAVING INCORPORATED THEREIN: (1) HYDROQUINONE IN AMOUNT GENERALLY SUFFICIENT TO CAUSE TANNING DEVELOPMENT IN THE EXPOSED AREAS OF SAID LAYER IN THE PRESENCE OF SAID AQUEOUS ALKALINE LIQUID; (2) A TANNING INHIBITING AGENT IN AN AMOUNT UP TO ABOUT 35 MOLE PERCENT OF SAID HYDROQUINONE AND GENERALLY SUFFICIENT TO INHIBIT TANNING DEVELOPMENT IN THE UNEXPOSED AREAS OF SAID LAYER, SAID AGENT BEING FREE OF DEVELOPING ACTIVITY AND SELECTED FROM THE GROUP CONSISTING OF; (A) AN AROMATIC HYDROXY COMPOUND OF THE GROUP CONSISTING OF A NAPHTHOL AND A POLYHYDROXY BENZENE HAVING AT LEAST TWO HYDROXYL GROUPS IN METAL POSITION RELATIVE TO ONE ANOTHER, AND (B) A WATER-SOLUBLE PRIMARY AMINO COMPOUND OF THE GROUP CONSISTING OF A LOWER ALIPHATIC PRIMARY AMINE, AN AMINO CARBOXYLIC ACID, AND AN AMINO SULFONIC ACID; AND (3) A COMPOUND SPLITTING OFF BISULFITE IONS IN THE PRESENCE OF SAID LIQUID IN AN AMOUNT UP TO ABOUT 50 MOL PERCENT OF SAID HYDROQUINONE AND GENERALLY SUFFICIENT TO STABILIZE SAID EMULSION LAYER AGAINST AERIAL OXIDATION.

Claim 4

LIGHT-SENSITIVE PHOTOGRAPHIC MATERIAL FOR IMAGE WISE EXPOSURE WITH LIGHT AND DEVELOPMENT IN AN AQUEOUS ALKALINE LIQUID COMPRISING AT LEAST ONE SILVER HALIDE EMULSION LAYER AND HAVING INCORPORATED THEREIN: (1) HYDROQUINONE IN AMOUNT GENERALLY SUFFICIENT TO CAUSE TANNING DEVELOPMENT IN THE EXPOSED AREAS OF SAID LAYER IN THE PRESENCE OF SAID AQUEOUS ALKALINE LIQUID; (2) A TANNING INHIBITING AGENT IN AN AMOUNT UP TO ABOUT 35 MOLE PERCENT OF SAID HYDROQUINONE AND GENERALLY SUFFICIENT TO INHIBIT TANNING DEVELOPMENT IN THE UNEXPOSED AREAS OF SAID LAYER, SAID AGENT BEING FREE OF DEVELOPING ACTIVITY AND SELECTED FROM THE GROUP CONSISTING OF; (A) AN AROMATIC HYDROXY COMPOUND OF THE GROUP CONSISTING OF A NAPHTHOL AND A POLYHYDROXY BENZENE HAVING AT LEAST TWO HYDROXYL GROUPS IN METAL POSITION RELATIVE TO ONE ANOTHER, AND (B) A WATER-SOLUBLE PRIMARY AMINO COMPOUND OF THE GROUP CONSISTING OF A LOWER ALIPHATIC PRIMARY AMINE, AN AMINO CARBOXYLIC ACID, AND AN AMINO SULFONIC ACID; AND (3) A COMPOUND SPLITTING OFF BISULFITE IONS IN THE PRESENCE OF SAID LIQUID IN AN AMOUNT UP TO ABOUT 50 MOL PERCENT OF SAID HYDROQUINONE AND GENERALLY SUFFICIENT TO STABILIZE SAID EMULSION LAYER AGAINST AERIAL OXIDATION.