Photographic printing paper support
US5780213A · kind A · utility
0Cited by
11References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1997 |
| Grant date | Jul 14, 1998 |
| Priority date | — |
| Expiry date | Sep 5, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/79
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is a photographic printing paper support having waterproof resin layers on both sides of a substrate, with the waterproof resin layer on the emulsion-coated side comprising at least an upper layer containing from 5 to 25% by weight of titanium oxide and from 0 to 0.56% by weight of a blueing agent and a lower layer containing substantially no titanium oxide but containing from 0.05 to 0.60% by weight of a blueing agent, and wherein the upper layer contains less blueing agent than the lower layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.