Photographic silver halide element having a protective layer comprising beads of resinous material and water-insoluble wax
US4820615A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1988 |
| Grant date | Apr 11, 1989 |
| Priority date | — |
| Expiry date | Aug 4, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/162
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to photographic elements comprising a support and on one or on both sides of said support in the given order at least one photosensitive silver halide emulsion layer and at least one protective hydrophilic colloid layer comprising finely divided solid spherical beads having an average size ranging from 0.5 to about 20 .mu.m, said beads comprising at least one photographically inert hydrophobic polymeric resinous material and, distributed throughout said resinous material, at least one water-insoluble wax, in a ratio by weight ranging from 10:0.1 to 10:5. The present invention also relates to a method of making such photographic elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.