Process for preparing direct positives

Claim 1

THE PROCESS FOR PREPARING A DIRECT POSITIVE WITH A LIGHT-SENSITIVE ELEMENT HAVING A SUPPORT, AN UNHARDENED GELATINO-SILVER HALIDE EMULSION LAYER SERVING AS A POSITIVE LAYER, A GELATINO-SILVER HALIDE EMULSION LAYER SERVING AS A NEGATIVE LAYER POSITIONED FURTHER FROM SAID SUPPORT THAN SAID POSITIVE LAFYER AND AN INTERLAYER POSITIONED BETWEEN SAID POSITIVE LAYER AND SAID NEGATIVE LAYER COMPRISING A HYDROPHILIC COLLOID NOT HARDENED BY OXIDIZED TANNING DEVELOPERS, SAID LIGHT-SENSITIVE ELEMENT HAVING SUBSTANTIALLY GREATER LIGHT SENSITIVITY TO A REGION OF THE VISIBLE SPECTRUM IN SAID NEGATIVE LAYER THAN SAID POSITIVE LAYER WHEN EXPOSED THROUGH SAID NEGATIVE LAYER, WHICH COMPRISES EXPOSING SAID NEGATIVE LAYER AND FORMING A LTENT IMAGE IN SAID NEGATIVE LAYER WITHOUT EXPOSING SAID POSITIVE LAYER, DEVELOPING SAID LATENT IMAGE IN SAID NEGATIVE LAYER IN AN AQUEOUS ALKALINE SOLUTION WITH A TANNING DEVELOPER AND THEREBY FORMING A SILVER NEGATIVE IMAGE IN SAID NEGATIVE LAYER, EXPOSING SAID POSITIVE THROUGH SAID SILVER NEGATIVE IMAGE IN SAID NEGATIVE LAYER IN THE PRESENCE OF SAID AQUEOUS ALKALINE SOLUTION AND SAID TANNING DEVELOPER AND THEREBY FORMING SILVER POSITIVE IMAGE IN SAID POSITIVE LAYER, AND THERAFTER WASHING OFF SAID NEGATIVE LAYER, SAID INTERLAYER AND UNDEVELOPED PORTIONS OF SAID UNHARDENED GELATINO-SILVER HALIDE EMULSION IN SAID POSITIVE LAYER AND LEAVING SAID SILVER POSITIVE IMAGE ON SAID SUPPORT.