Process for stabilizing magenta couplers and the corresponding image dyes in photographic materials
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United States of America Patent
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Sep 8, 1992
Grant Date -
N/A
app pub date -
May 13, 1991
filing date -
May 16, 1990
priority date (Note) -
Expired
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Abstract
Compounds of the formula ##STR1## in which R is hydrogen or hydroxyl, R.sub.1 is alkyl, alkoxy, amino or aryl, and R.sub.2 is hydrocarbylcarbonyl or hydrocarbylsulfonyl, are highly suitable for stabilizing magenta couplers in photographic materials.
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