Appeal No. 1998-2523
Application No. 08/778,644
BACKGROUND
Appellants’ invention relates generally to color photography and compositions
useful in the processing of color reversal photographic elements. Specifically, the
invention relates to a bleach replenisher composition comprising a ferric complex of
ethylenediaminetetraacetic acid and having a pH of from 5.4 to about 5.6. The
replenisher composition is formed from used processing solutions that have been
collected and combined with additional components to regenerate the used
compositions. Claim 18, which is representative of the claimed invention, appears
below:
18. A pH adjusted regenerated bleach replenisher composition
comprising a ferric complex of ethylenediaminetetraacetic acid and
having a pH of from 5.4 to about 5.6,
said pH adjusted regenerated bleach replenisher composition provided
by mixing:
at least 50% of the overflow from a ferric-ethylenediaminetetraacetic
acid bleaching solution with
a bleach regenerator composition having a pH of from about 6.0 to
about 6.5, and comprising hydrobromic acid and lithium, potassium or
ammonium bromide salt sufficient to provide a total bromide ion
concentration of from about 210 to about 240 g/l, at least from about
80 to about 97% of said bromide ion being provided by said lithium,
-2-
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