Process of preparing silver halide dispersions

Claim 1

A PORCESS WHIDH COMPRISES ADMIXING (1) AN AQUEOUS DISPERSION OF LIGHT-SENSITIVE SILVER HALIDE IN A SYNTHETIC WATER-PERMEABLE AMPHOTERIC ADDITION POLYMERE OF HIGH MOLECULAR WEITHT HAVING PROTECTIVE COLLOIDE PROPERTIES AND CONTAINING ACID GROUPS AND GROUPS TAKEN FROM THE CLASS CONSISTING OF AMINE AND QUATERNARY AMMONIUM GROUPS, AND (2) AN AQUEOUS SOLUTION HAVING DISSOLVED THEREIN FROM 3% TO 20% BY WEIGHT BASED ON SAID AMPHOTERIC POLYMERE OF A WATER-SOLUBLE, ACID-SOLUBLE ANIONIC ORGANIC POLYMERE OF HIGH MOLECULAR WEIGHT HAVING PERODICALLY OCCURING GROUPS TAKEN FROM THE CLASS CONSISTING OF FREE ACID GROUPS AND SALTS THREEOF, SAID ANIONIC POLYMER BEING TAKEN FROM THE GROUP CONSISTING OF POLYVINYL ACETALS, CARRAGEENIN, ALKYL VINYL ETHER/MALEIC ANHYDRIDE COPOLYMERS, POLYSTYRENE SULFONATES, POLYVINYL PHOSPHATES AND PHOSPHATES OF POLYGLYCIDYL METHACRYLATES, WHICH ANIONIC POLYMERS ARE SOLUBLE BOTH IN WATER AND 1% NITRIC ACID TO THE EXTENT OF AT LEAST 1% BY WEIGHT, AND (3) THEN ADDING AN ACID IN AN AMOUNT SUFFICIENT TO LOWER THE PH BELOW THE ISOCLECTRIC POINT OF SUCH AMPHOTERIC POLYMER, AND RECOVERING THE RESULTING PRECIPITATE CHEMICAL COMPLEX OF SAID ACID-SOLUBLE ANIONIC POLYMER AND SAID AMPHOTERIC POLYMER CONTAINING DISPERSED SILVER HALIDE.