Photographic processing using biodegradable bleaching agent followed by fixing
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 6, 2001
Grant Date -
N/A
app pub date -
Dec 18, 1998
filing date -
Dec 18, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Color photographic silver halide materials, especially color photographic papers, are processed effectively with reduced iron retention after bleaching with a biodegradable bleaching composition. Bleaching is accomplished using an iron chelate of a biodegradable chelating ligand in the presence of a polyphosphonic acid. This bleaching step is followed by fixing using a fixing composition that includes a fixing agent and a polycarboxylic acid.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
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