High contrast photographic materials
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 26, 1991
Grant Date -
N/A
app pub date -
Mar 29, 1988
filing date -
Apr 2, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Pepper fog may be reduced in high contrast photographic materials comprising silver halide emulsion in association with a hydrazine by the presence of at least 0.001 mole per mole of silver halide of a water-soluble bromide and/or water-soluble chloride. Suitable water-soluble bromides and chlorides are alkali metal bromides and chlorides which are advantageously added to the silver halide emulsion after physical ripening and washing.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully