Toning of photographic print material
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United States of America Patent
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Nov 18, 1997
Grant Date -
N/A
app pub date -
May 6, 1996
filing date -
May 13, 1995
priority date (Note) -
Expired
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Abstract
There is described a photographic developing solution which comprises as an image toning agent a compound of formula I: ##STR1## where Ar is an aromatic or heteroaromatic ring which may be substituted, in a concentration of at least 0.00035 moles/liter.
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