公开(公告)号：US3748129A

公开(公告)日：1973-07-24

申请号：US3748129D

申请日：1971-12-06

Applicant: POLAROID CORP

Inventor： AVTGES J ,  TAYLOR L ,  REID J ,  SCHLEIN H

IPC: G03C8/08 ,  G03C8/16 ,  G03C7/00

CPC classification number: G03C8/16

Abstract: DIFFUSION TRANSFER PHOTOGRAPHIC PRODUCTS COMPRISING A SUPPORT CARRYING AT LEAST TWO SELECTIVELY SENSITIZED SILVER HALIDE EMULSION LAYERS EACH HAVING A DYE WHICH IS PREFERABLY A SILVER HALIDE DEVELOPING AGENT OF PREDETERMINED COLOR ASSOCIATED THEREWITH, AT LEAST ONE OF SAID DYES BEING PRESENT AS A DISPERSION IN A LAYER IMMEDIATELY ADJACENT ITS ASSOCIATED SILVER HALIDE EMULSION LAYER SAID DISPERSION MATRIX COMPRISING A POLYMER WHICH IS PERMEABLE TO HYDROXYL ION AND SOLUBLIZED DYE AT A RATE WHICH INSURES SUBSTANTIAL DEVELOPMENT OF EACH DYES ASSOCIATED SILVER HALIDE EMULSION LAYER PRIOR TO CONTACT OF SUCH LAYER WITH

SUBSTANTIAL AMOUNTS OF SOLUBILIZED UNASSOCIATED DYE MATERIAL.

公开(公告)号：US3785815A

公开(公告)日：1974-01-15

申请号：US3785815D

申请日：1972-04-24

Applicant: POLAROID CORP

Inventor： AVTGES J ,  TAYLOR L ,  REID J ,  SCHLEIN H

IPC: G03C8/54 ,  G03C8/52 ,  G03C7/00 ,  G03C1/48 ,  G03C1/76 ,  G03C5/54

CPC classification number: G03C8/52

Abstract: Novel photographic products for use in color diffusion transfer, particularly color diffusion transfer systems for forming color images viewable without separation as reflection prints, which products include a neutralizing layer for lowering the environmental pH after application of an aqueous alkaline processing fluid and a ''''timing'''' spacer layer so disposed with respect to the neutralizing layer that the processing fluid must first diffuse through the spacer layer before contacting the neutralizing layer, the spacer layer comprising, as a continuous phase, the coalesced essence of an aqueous film-forming synthetic polymer dispersion which is substantially impermeable to the processing fluid and a discontinuous phase comprising a material which is permeable to the processing fluid.