Methods for washing and protecting photographic silver images

Claim 1

A FABRIC TESTING APPARATUS FOR DETERMINING QUALITY CHARACTERISTICS OF FABRIC AND OTHER FLEXIBLE MATERIALS COMPRISING, IN COMBINATION A RELATIVELY SMALL CLOSED TEST CHAMBER CONSISTING OF A GENERALLY CYLINDRICAL INNER WALL EXTENDING BETWEEN A PAIR OF SPACED APART END WALLS WITH AT LEAST ONE SAID WALLS MOVEABLE TO AFFORD ACCESS TO SAID TEST CHAMBER; AN ELECTRIC MOTOR MOUNTED ADJACENT SAID TEST CHAMBER WITH A ROTATABLE SHAFT DRIVEN BY SAID MOTOR EXTENDING THROUGHT ONE OF THE AFOREMENTIONED END WALLS INTO SAID TEST CHAMBER, AND MEANS FOR DRIVING A SAMPLE OF MATERIAL WITHIN SAID CONTAINER IN A RANDOM, ZIG-ZAG PATH OF MOVEMENT ALONG A GENERALLY CIRCULAR ORBIT AND SIMULTANEOUSLY CAUSING IT TO REPEATEDLY IMPINGE THE WALLS OF SAID CONTAINER AND CAROM THEREFROM WHEREBY SAID SAMPLE IS SUBJECTED TO BOTH INTERNAL AND EXTERNAL FRICTION AS IT PROGRESSES; SAID MEANS CONSISTING OF A ROTARY IMPELLER HAVING A HUB PORTION CENTRALLY DISPOSED ON THE AXIS OF SAID CONTAINER AND AT LEAST ONE PAIR OF FLAT PADDLES, EACH PADDLE EXTENDING FROM SAID HUB TO A POINT ADJACENT THE CYLINDRICAL WALL OF THE CONTAINER AND BETWEEN THE END WALLS THEREOF, THE PADDLES OF SAID PAIR BEING INCLINED TO SAID HUB AND LYING IN SUBSTASNTIALLY THE SAME PLANE. SOLUTION OF A SILVER HALIDE DEVELOPER AND A SILVER HALIDE SOLVENT WHEREBY EXPOSED SILVER HALIDE IS REDUCED TO SILVER AND UNREDUCED SILVER HALIDE FORMS A WATER-SOLUBLE, COMPLEX SILVER SALT WHICH DIFFUSES THROUGH THE LAYER OF SOLUTION TO THE SILVER-RECEPTIVE STRATUM WHERE, UPON BEING REDUCED TO SILVER, IT FORMS A VISIBLE PRINT, STRIPPING SAID PRINT FROM SAID GELATINO SILVER HALIDE STRATUM, SAID PRINT CONTAINING A RESIDUE OF SAID SOLUTION, SWABBING SAID PRINT WITH AN ABSORBENT APPLICATOR CHARGED WITH AN ALKALINE AQUEOUS SOLUTION OF HYDROLYZED GELATIN IN ORDER TO WASH SAID RESIDUE FROM SAID PRINT INTO SAID APPLICATON, AND DRYING SOLUTION RETAINED ON SAID PRINT IN ORDER TO INTIMATELY ASSOCIATE SAID HYDROLYZED GELATIN WITH SAID SILVER IN SAID PRINT.