Toning of photographic print material

Details Toning of photographic print material Toning of photographic print material

1996-05-06

1997-11-18

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Nonradiation sensitive image processing compositions or...

Developer

430268, 430486, G03C 5305

Patent

active

056886357

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.

REFERENCES:
patent: 2396156 (1946-03-01), Clarkson
patent: 3615512 (1971-10-01), Ducrocq et al.
patent: 5380624 (1995-01-01), Yoshida et al.
patent: 5384232 (1995-01-01), Bishop et al.
patent: 5503965 (1996-04-01), Okutsu

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