Reduction of optical brightener migration in polyolefin coated paper bases
US5061610A · kind A · utility
6Cited by
12References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1990 |
| Grant date | Oct 29, 1991 |
| Priority date | — |
| Expiry date | Oct 22, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/134
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In the preparation of a light sensitive photographic paper wherein the paper support contains a polyolefin coating the polyolefin is subjeced to two corona discahrge treatments, the first to prevent optical brightener from exuding from the polyolefin upon storage and the second after storage and before coating the next adjacent layer unto the polyolefin surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.