Process for the production of photographic images in natural colours by the subtracrive three-colour process

Claim 1

A PROCESS FOR PRODUCING A COLOURED IMAGE BY THE THREE COLOUR PROCESS ON A SUPPORT COMPRISING A CELLULOSE ESTER FILM, CONSISTING IN FIRST TREATING THE SUPPORT IN A BASE SOLUTION CONSISTING OF THE DIAZOSUPLHONATE OF 5-AMINO-2BENZOYLAMINO-1-4-DIETHOXYBENZOL AND A COUPLING AGENT FOR THE BLUE COLOUR COMPONENT DISSOLVED IN A VIOLATILE SOLVENT, EXPOSING THE SUPPORT THUS TREATED BEHIND THE NEGATIVE OF THE BLUE COLOUR COMPONENT, SUBSEQUENTLY WASHING THE SUPPORT IN AN ALCOHOLIC CAUSTIC SODA SOLUTION TO DISSOLVE THE DIAZOSULPHONATE AND COUPLING AGENT WHICH IS UNTRANSFORMED BY LIGHT, AND THEREAFTER WASHING THE SUPPORT TO ELIMINATE THE ALCOHOLIC CAUSTIC SODA SOLUTION PEATING THESE OPERATIONS FOR THE RED AND YELLOW COLOUR COMPONENTS IN DESIRED ORDER UTILIZING FOR THE BASIC SOLUTION IN TREATING FOR THE RED AND THE YELLOW COLOR COMPONENTS RESPECTIVELY, THE DIAZOSULPHONATE OF 1-AMINO-2-4DIMETHYLBENZOL AND A COUPLED AGENT SUITABLE TO THE PARTICULAR COLOR COMPONENT THEN BEING TREATED FOR, SAID COUPLING AGENT BEING DISSOLVED IN A VOLATILE SOLVENT, EXPOSING THE SUPPORT THUS TREATED BEHIND THE NEGATIVE PERTAINING TO SAID PARTICULAR COLOUR COMPONENT, SUBSEQUENTLY WASHING THE SUPPORT IN AN ALCOHOLIC CAUSTIC SODA SOLUTION TO DISSOLVE THE PORTIONS OF SAID SOLUTIONS NOT HARDENED BY LIGHT, FOLLOWED BY WASHING THE SUPPORT TO ELIMINATE THE ALCOHOLIC CAUSTIC SODA, AND IN TREATING THE SUPPORT FOR THE OTHER ONE OF SAID RED AND YELLOW COLOUR COMPONENTS UTILIZING FOR THE BASIC SOLUTION THE DIAZOSULPHONATE OF 1-AMINO-2-4-DIMETHYLBENZOL AND A COUPLING AGENT FOR SAID OTHER COLOR COMPONENT DISSOLVED IN A VOLATILE SOLVENT, EXPOSING THE SUPPORT THUS TREATED BEHIND THE NEGATIVE PERTAINING TO SAID OTHER COLOUR COMPONENT, SUBSEQUENTLY WASHING THE SUPPORT IN AN ALCOHOLIC CAUSTIC SODA SOLUTION FOLLOWED BY WASHING THE SUPPORT TO ELIMINATE THE ALCOHOLIC CAUSTIC SODA AS BEFORE, THEREBY PRODUCING A COLOURED IMAGE OF THE SUBJECT PHOTOGRAPHED.