Multilayer color photographic materials
US4141730A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1976 |
| Grant date | Feb 27, 1979 |
| Priority date | — |
| Expiry date | Apr 7, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/3335
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a multilayer color photographic material essentially comprising a support having coated thereon, in succession, a red-sensitive silver halide emulsion layer and a green-sensitive silver halide emulsion layer, with an optional yellow filter layer and a blue-sensitive silver halide emulsion layer, by disposing a non-sensitive auxiliary layer containing a non-diffusible colored coupling compound which releases a diffusible dye at color development capable of being removed from the photographic layer at development, an effective masking can be applied to the side absorption of cyan dye image without reducing the sensitivity of the red-sensitive silver halide emulsion layer during storage before or after exposure. The red-sensitive silver halide emulsion layer may optionally be composed of two or more layers having different sensitivities, whereby the non-diffusible colored coupling compound can be incorporated into at least one layer selected from the non-sensitive auxiliary layer and a red-sensitive silver halide emulsion layer having high sensitivity. The non-diffusible colored coupling compound can be present in the following locations: PA1 (1) in a non-photosensitive layer which…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.