Colloid transfer process

Claim 1

A PHOTOGRAPHIC ELEMENT FOR USE IN THE COLLOID TRANSFER PROCESS HAVING THEREON TWO OPTICALLY-SENSITIZED, LIGHTSENSITIVE, CONTIGUOUS SILVER HALIDE EMULSION LAYERS, SAID SILVER HALIDE DISPERSED IN AN ALKALI-PERMEABLE, WATERSWELLABLE UNHARDENED COLLOID NOT HARDER THAN A GELATIN LAYER CONTAINING 0.7 GRAM OF FORMALDEHYDE PER POUND OF GELATIN FRESHLY COATED, HAVING A FIRST EMULSION LAYER ON THE SUPPORT AND AND A SECOND EMULSION LAYER COATED OVER THE FIRST EMULSION LAYER, THE SECOND EMULSION LAYER CONTAINING 40-70% OF THE TOTAL SILVER HALIDE IN BOTH EMULSION LAYERS AND 60-90% OF THE TOTAL COLLOID PRESENT IN BOTH EMULSION LAYERS, SAID EMULSION ALYERS CONTAINING A TOTAL COVERAGE OF 100-500 MILLIGRAMS SILVER PER SQUARE FOOT AS SILVER HALIDE AND A TOTAL COVERAGE OF 450-900 MILLIGRAMS COLLOID PER SQUARE FOOT.

Claim 3

A METHOD OF PHOTOGRAPHIC REPRODUCTION COMPRISING DEVELOPING AN EXPOSED PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING THEREON TWO OPTICALLY-SENSITIZED, LIGHTSENSITIVE, CONTIGUOUS SILVER HALIDE EMULSION LAYERS DISPERSED IN AN ALKALI-PERMEABLE, WATER-SWELLABLE, UNHARDENED COLLOID HAVING A FIRST EMULSION LAYER ON THE SUPPORT AND A SECOND EMULSION LAYER COATED OVER THE FIRST EMULSION LAYER, SAID UNHARDENED COLLOID BEING NOT HARDER THAN A GELATIN LAYER CONTAINING 0.7 GRAM OF FORMALDEHYDE PER POUND OF GELATIN FRESHLY COATED, THE SECOND EMULSION LAYER CONTAINING 40-70% OF THE TOTAL SILVER HALIDE IN BOTH EMULSION LAYERS AND 60-90% OF THE TOTAL COLLOID PRESENT IN BOTH EMULSION LAYERS, SAID EMULSION LAYERS CONTAINING A TOTAL OF ABOUT 100-500 MILLIGRAMS OF SILVER PER SQUARE FOOT AS SILVER HALIDE AND 450-900 MILLIGRAMS COLLOID PER SQUARE FOOT, BY DEVELOPING WITH A SILVER HALIDE TANNING DEVELOPER TO FORM A HARDENED COLLOID IMAGE IN THE EXPOSED AREAS OF AT LEAST THE SECOND EMULSION LAYER AND LEAVING SUBSTANTIALLY UNHARDENED COLLOID INTHE UNEXPOSED AREA OF SAID LAYER, REMOVING EXCESS WATER FROM THE SURFACE OF THE SAID SECOND EMULSION LAYER, PLACING A SHEET HAVING AN ABSORBENT SURFACE AGAINST SAID SECOND EMULSION LAYER WHILE SAID EMULSION LAYER IS IN CONDITION TO PRINT AND THE SURFACE OF THE SECOND EMULSION LAYER FREE OF GREASY MATERIAL TO CAUSE ONLY SAID UNHARDENED COLLOID PORTION OF SAID LAYER TO ADHERE TO SAID SHEET, AND SEPARATING SAID SHEET AND SAID SECOND EMULSION LAYER TO TRANSFER ONLY A STRATUM OF UNHARDENED COLLOID OF SAID LAYER TO SAID SHEET.

Claim 4

A METHOD OF PHOTOGRAPHIC REPRODUCTION COMPRISING DEVELOPING AN EXPOSED PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING THEREON TWO OPTICALLY-SENSITIZED, LIGHTSENSITIVE, CONTIGUOUS SILVER HALIDE EMULSION LAYERS DISPERSED IN AN ALKALI-PERMEABLE, WATER-SWELLABLE, UNHARDENED COLLOID HAVING A FIRST EMULSION LAYER ON THE SUPPORT AND A SECOND EMULSION LAYER COATED OVER THE FIRST EMULSION LAYER, SAID UNHARDENED COLLOID BEING NOT HARDER THAN A GELATIN LAYER CONTAINING 0.7 GRAM OF FORMALDEHYDE PER POUND OF GELATIN FRESHLY COATED, THE SECOND EMULSION LAYER CONTAINING 40-70% OF THE TOTAL SILVER HALIDE IN BOTH EMULSION LAYERS AND 60-90% OF THE TOTAL COLLOID PRESENT IN BOTH EMULSION LAYERS, SAID EMULSION LAYERS CONTAINING A TOTAL OF ABOUT 100-500 MILLIGRAMS OF SILVER PER SQUARE FOOT AS SILVER HALIDE AND 450-900 MILLIGRAMS COLLOID PER SQUARE FOOT, BY DEVELOPING WITH A SILVER HALIDE TANNING DEVELOPER TO FORM A HARDENED COLLOID IMAGE IN THE EXPOSED AREAS OF AT LEAST THE SECOND EMULSION LAYER AND LEAVING SUBSTANTIALLY UNHARDENED COLLOID INTHE UNEXPOSED AREA OF SAID LAYER, REMOVING EXCESS WATER FROM THE SURFACE OF THE SAID SECOND EMULSION LAYER, PLACING A SHEET HAVING AN ABSORBENT SURFACE AGAINST SAID SECOND EMULSION LAYER WHILE SAID EMULSION LAYER IS IN CONDITION TO PRINT AND THE SURFACE OF THE SECOND EMULSION LAYER FREE OF GREASY MATERIAL TO CAUSE ONLY SAID UNHARDENED COLLOID PORTION OF SAID LAYER TO ADHERE TO SAID SHEET, AND SEPARATING SAID SHEET AND SAID SECOND EMULSION LAYER TO TRANSFER ONLY A STRATUM OF UNHARDENED COLLOID OF SAID LAYER TO SAID SHEET.