Polyolefin coated photographic base and method of producing
US4042398A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1975 |
| Grant date | Aug 16, 1977 |
| Priority date | — |
| Expiry date | Oct 20, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31902
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process is provided to produce a novel photographic base by applying an aqueous coating composition containing aluminum oxide particles to at least one surface of a substrate, drying the coated substrate, applying a molten film of a polyolefin over at least one of the coated surfaces of the coated substrate, adhering the polyolefin to the coated surface, and cooling the polyolefin film to a temperature below the melt point of the polyolefin. The photographic base so produced may be further treated by applying a coating of a light sensitive silver halide emulsion to one side of the photographic base paper and drying the emulsion coated paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.