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US 5,212,045 AGranted
Method for image formation
AssigneeMitsubishi Paper Mills Limited
InventorsMasao Koga, Minoru Ohashi
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AssigneeMitsubishi Paper Mills Limited
InventorsMasao Koga, Minoru Ohashi
Estimating the term…
Disclosed is a method for image formation which comprises developing a silver halide photographic photosensitive material in the presence of a compound represented by the following formula [I] or [II]: ##STR1## wherein Ar represents an aryl group, R.sub.1, R.sub.2 and R.sub.3 which may be identical or different 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.1 and R.sub.2 may link to each other to form a ring, and at least one of R.sub.1, R.sub.2 and R.sub.3 has at least one hydroxyl group as a substituent, ##STR2## wherein Ar.sub.1 and Ar.sub.2 each represents a divalent aromatic group, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group, R.sub. and R.sub.2 may link to each other to form a ring and R.sub.3 and R.sub.4 may link to each other to form a ring, L represents a divalent linkage group, and n represents 0 or 1.
A method for high contrast image formation which comprises developing an image-wise exposed a silver halide photographic photosensitive material in the presence of a compound represented by the following formula ##STR11## wherein Ar.sub.1 and Ar.sub.2 may be identical or different and each represents a divalent aromatic group, R.sub.1, R.sub.2 and R.sub.3 and R.sub.4 may be identical or different and each represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group, R.sub.1 and R.sub.2 may link to each other to form a ring and R.sub.3 and R.sub.4 may link to each other to from a ring, L represents a divalent linkage group, and n represents 0 or 1.
A silver halide photosensitive material which contains the compound represented by the formula ##STR13## wherein Ar.sub.1 and Ar.sub.2 may be identical or different and each represents a divalent aromatic group, R.sub.1, R.sub.2 and R.sub.3 and R.sub.4 may be identical or different and each represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group, R.sub.1 and R.sub.2 may link to each other to form a ring and R.sub.3 and R.sub.4 may link to each other to form a ring, L represents a divalent linkage group, and n represents 0 or 1.
Dependencies are inferred from the claim text.