High-contrast photographic elements with improved print-out capability
US5279933A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1993 |
| Grant date | Jan 18, 1994 |
| Priority date | — |
| Expiry date | Feb 3, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2001/03517
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A high-contrast room-light-handleable black-and-white silver halide photographic element that is especially useful in the field of graphic arts is comprised of a support, an imaging layer containing doped silver halide grains with a mean grain size of less than 0.12 micrometers, and a print-out layer containing doped silver halide grains with a mean grain size in the range of from 0.14 to 0.4 micrometers. The element utilizes very slow speed emulsions which render it capable of being handled in room light and is able to print-out a visible image on normal exposure and develop to full density upon being processed in conventional developing solutions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.