Polymeric hydroxamic acid polyvalent metal salt interlayer for photographic diffusion transfer products
US4352871A · kind A · utility
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3References
20Claims
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Key dates
| Filing date | Dec 17, 1980 |
| Grant date | Oct 5, 1982 |
| Priority date | — |
| Expiry date | Dec 17, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C8/52
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Photosensitive elements for color diffusion transfer film units comprising a support layer, at least two selectively-sensitized silver halide layers having image-dye forming materials associated therewith, and a novel interlayer, separating the silver halide layers, comprising a polymeric hydroxamic acid polyvalent metal salt which serves as a barrier to the migration of solubilized image-dye forming material until it is rendered permeable to the image-dye forming material subsequent to contact with a sequestering agent for the polyvalent metal of the salt barrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.