Process of washing and protecting photographic silver images

Claim 1

A PHOTOGRAPHIC PROCESS FOR PRODUCING A STABLE PRINT, SAID PROCESS COMPRISING TREATING A SILVER HALIDE STRATUM AND A SILVER-RECEPTIVE STRATUM BY REACTING A SILVER HALIDE DEVELOPER WITH EXPOSED SILVER HALIDE IN SAID SILVER HALIDE STRATUM TO REDUCE SILVER HALIDE TO SILVER, REACTING A SILVER HALIDE SOLVENT WITH UNREDUCED SILVER HALIDE IN SAID SILVER HALIDE STRATUM TO FORM A WATER-SOLUBLE COMPLEX SILVER SALT, TRANSFERRING SAID COMPLEX SILVER SALT FROM SAID SILVER HALIDE STRATUM TO SAID SILVER-RECEPTIVE STRATUM, REDUCING SAID COMPLEX SILVER SALT TO SILVER TO FORM A VISIBLE PRINT IN SAID SILVER-RECEPTIVE STRATUM, AND THEREAFTER APPLYING TO SAID SILVER-RECEPTIVE STRATUM A COMPOSITION CONTAINING AN AQUESOUS SOLUTION OF A SALT OF A HEAVY METAL WHICH FORMS A WATER-INSOLUBLE SULFIDE, SAID COMPOSITION BEING IN SUFFICIENT QUANTITY TO PROVIDE, WHEN DRIED, A RESIDUE CONTAINING A QUANTITY OF SAID HEAVY METAL SALT, AND QUANTITY OF HEAVY METAL SALT IN SAID RESIDUE BEING LARGE RELATIVE TO THE QUANTITY OF SILVER IN SAID PRINT AND BEING SUFFICIENTLY SMALL SO THAT IT AND SULFIDES FORMED FROM IT DO NOT APPRECIABLE AFFECT THE APPEARANCE OF SAID PRINT.