公开(公告)号：US3719489A

公开(公告)日：1973-03-06

申请号：US3719489D

申请日：1971-06-21

Applicant: POLAROID CORP

Inventor： MENEGHINI F ,  ROGERS H ,  CIECIUCH R ,  LUHOWY R

IPC: G03C8/04 ,  G03C8/08 ,  G03C8/10 ,  G03C5/54 ,  G03C1/40

CPC classification number: G03C8/08 ,  G03C8/045 ,  G03C8/10

Abstract: THIS INVENTION RELATES TO PHOTOGRAPHIC PROCESS EMPLOYING PHOTOGRAPHICALLY INERT COMPOUNDS WHICH ARE STABLE IN THE PHOTOGRAPHIC PROCESSING COMPOSITION BUT CAPABLE OF UNDERGOING CLEAVAGE IN THE PRESENCE OF AN IMAGEWISE DISTRIBUTION OF SILVER IONS AND/OR SOLUBLE SILVER COMPLEX CONTAINING SILVER IONS MADE AVAILABLE AS A FUNCTION OF DEVELOPMENT TO LIBERATE A REAGENT IN AN IMAGEWISE DISTRIBUTION CORRESPONDING TO THAT OF SAID SILVER ION AND/OR SAID COMPLEX. IN ONE EMBODIMENT, THE PHOTOGRAPHICALLY INERT COMPOUND IS SUBSTANTIALLY NON-DIFFUSIBLE IN THE PHOTOGRAPHIC PROCESSING COMPOSITION AND THE REAGENT RELEASED THEREFROM AS A FUNCTION OF DEVELOPMENT IS DIFFUSIBLE IN THE PROCESSING COMPOSITION. IN ANOTHER EMBODIMENT, THE DIFFUSIBLE REAGENT RELEASED IS A DIFFUSIBLE DYE. COMPOUNDS APRTICULARLY USEFUL FOR LIBERATING A REAGENT ARE 1,3-SULPHUR-NITROGEN COMPOUNDS, E.G., THIAZOLIDINES, AND THEIR VINYL AND PHENYLENE ANALOGS.

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