Temporary polymeric mordants and elements containing same
US4424272A · kind A · utility
14Cited by
7References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 3, 1981 |
| Grant date | Jan 3, 1984 |
| Priority date | — |
| Expiry date | Aug 3, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31935
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Polymeric mordants which are capable of converting to non-mordanting species in an alkaline environment are described. The mordants can be used in photographic elements to temporarily mordant a photographically useful dye material, such as a light-filter or anti-halation dye or a diffusion transfer image dye-providing material, and then release the dye material during processing of the element with an alkaline processing composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.