Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Two or more radiation-sensitive layers containing other than...
Patent
1989-01-30
1990-02-27
Le, Hoa Van
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Two or more radiation-sensitive layers containing other than...
430512, 430522, G03C 184
Patent
active
049045784
ABSTRACT:
This invention provides a light absorbing dye for silver halide photographic light-sensitive material which is represented by the following formula [I] or [II]: ##STR1## wherein R.sub.1 and R.sub.2 which may be identical or different each represents a substituted or unsubstituted alkyl group and may link to each other to form a ring, R.sub.3 represents an alkyl group substituted with at least one sulfo group or an aryl group substituted with at least one sulfo group, R.sub.4 represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a carboxy group or an alkoxycarbonyl group, and n represents an integer of 1-4; ##STR2## wherein R.sub.1 represents an alkyl group or an aryl group, R.sub.2 represents an aryl group substituted with sulfo group and R.sub.3 represents an alkyl group.
REFERENCES:
patent: 3627532 (1971-12-01), Depoorter et al.
patent: 4187225 (1980-02-01), Bader et al.
patent: 4500631 (1985-02-01), Sakamoto et al.
patent: 4542085 (1985-09-01), Takahashi et al.
Sumioka Ko-ichi
Tanaka Akira
Le Hoa Van
Mitsubishi Paper Mills Ltd.
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