Recording materials and method for manufacturing said materials coated from hydrophilic layers having no gelatin or low amounts of gelatin
US5989802A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 2, 1997 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Jun 2, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2005/168
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Recording materials and a method of manufacturing said materials by coating hydrophilic colloidal layer compositions on a support by slide-hopper or curtain-coating techniques, followed by drying, said materials comprising a support and one or more light-sensitive and/or heat-sensitive layer(s) having a hydrophilic colloidal coating composition comprising no gelatin(in the case of (photo)thermographic materials) or gelatin in low amounts in order to provide a ratio by weight of gelatin to silver halide expressed as an equivalent amount of silver nitrate in the range from 0.05 to 0.4 (in the case of a light-sensitive silver halide photographic material) and thickening agents composed of synthetic clay and anionic macromolecular polyelectrolytes and wherein said synthetic clay is present in an amount of at least 85% by weight versus a total amount of thickening agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.