Method for image formation

Details Method for image formation Method for image formation

1991-12-23

1993-10-19

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Silver halide colloid tanning process, composition, or product

430598, 430435, 430484, 430268, G03C 106

Patent

active

052544362

ABSTRACT:
The present invention provides a method for image formation which is free from the problems such as uneven development and pepper fog and can give photographic characteristics of extremely high contrast negative tone using a stable developer and which comprises developing a silver halide photographic light-sensitive material in the presence of a compound represented by the following formula (I): ##STR1## wherein R.sub.1 represents an alkyl group of 1-8 carbon atoms or a cycloalkyl group having 4-8 carbon atoms in the ring, R.sub.2, R.sub.3 and R.sub.4 may be identical or different and each represents a hydrogen atom, an alkyl group, an aralkyl group, an aryl group or a heterocyclic group with a proviso that they cannot be simultaneously hydrogen atoms, R.sub.2 and R.sub.3 may link to each other to form a ring structure, and at least one hydroxy group is present in the substituents R.sub.2, R.sub.3 and R.sub.4.

REFERENCES:
patent: 4221857 (1980-09-01), Okutsu et al.
patent: 4686167 (1987-08-01), Resnick et al.
patent: 5124230 (1992-06-01), Okamura et al.
patent: 5132201 (1992-07-01), Yagihara et al.

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