Mordant treating process and elements containing same

Claim 1

THE PROCESS FOR REDUCING IN A DYE TRANSFER RECEIVING ELEMENT THE BACK TRANSFER TENDENCIES OF A WATERSOLUBLE, PHOTOGRAPHIC POLYMERIC ACID DYE MORDANT SELECTED FROM THE GROUP CONSISTING OF (A) VINYL COPOLYMERS OF MONOETHYLENICALLY UNSATURATED COMPOUNDS HAVING TERTIARY AMINE SALT GROUPS AND MONOETHYLENICALLY UNSATURATED COMPOUNDS HAVING QUATERNARY AMMONIUM SALT GROUPS, (B) VINYL COPOLYMERS OF SAID UNSATURATED COMPOUNDS WITH UP TO 50% BY WEIGHT OF ANOTHER MONOETHYLENICALLY UNSATURATED COMPOUND, AND (C) QUATERNARY SALTS OF POLYINYLPYRIDINE, WHICH COMPRISES ADMIXING SAID MORDANT IN AQUEOUS SOLUTION WITH FROM 0.006 TO 0.085 MOL PER 100 GRAMS OF MORDANT POLYVALENT METAL IONS SELECTED FROM THE GROUP CONSISTING OF CHROMIC, CUPRIC, ALUMINUM AND FERRIC IONS, SUBSEQUENTLY AGING SAID SOLUTION AT A TEMPERATURE OF FROM 45*F. TO 212*F. FOR A PERIOD OF AT LEAST 1 1/2 HOURS, THE TEMPERATURE AND TIME OF SAID AGING TREATMENT BEING SELECTED SO THAT THE BACK TRANSFER TENDENCIES OF SAID MORDANT ARE REDUCED BY MORE THAN ABOUT 40% AND COATING SAID AGED SOLUTION ON SAID DYE TRANSFER RECEIVING ELEMENT.