Photographic element and process

Details Photographic element and process Photographic element and process

1991-06-17

1993-10-26

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Color imaging process

Color correcting

430544, 430219, 430957, 430382, 430444, 430564, 430607, 430611, 430505, 430504, G03C 700

Patent

active

052565238

ABSTRACT:
A compound (I) having a carrier moiety (CAR) and a releasable development inhibitor moiety (INH) capable of being released during photographic processing by means of at least one timing group (T) bonded to and releasable from the carrier moiety provides improved images in a photographic silver halide element and process when the inhibitor moiety (INH) comprises (R.sup.1) a non-aromatic, sterically hindered substituent group having (a) a tertiary carbon atom bonded directly to the releasable development inhibitor moiety or (b) a secondary carbon atom bonded directly to the releasable development inhibitor moiety and wherein the secondary carbon atom is not part of an unsubstituted carbocyclic ring containing at least 6 carbon atoms. Such compounds, particularly as couplers, are useful in photographic silver halide materials and processes to provide improved acutance and interimage effects.

REFERENCES:
patent: 3227554 (1966-01-01), Barr et al.
patent: 4248962 (1981-02-01), Lau
patent: 4409323 (1983-10-01), Sato et al.
patent: 4528263 (1985-07-01), Sugita et al.
patent: 4564587 (1986-01-01), Watanabe et al.

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