Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1993-04-26
1994-08-16
Chea, Thorl
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430600, 430607, 430613, 430615, 430940, G03C 1485
Patent
active
053386582
ABSTRACT:
A silver halide photographic material which contains at least one compound represented by the following general formula (I) in at least one silver halide photographic emulsion layer or one hydrophilic colloid layer, whereby achieving high Dmax and low Dmin: ##STR1## wherein T, U, V, and W each represents CH or N; R.sup.1 represents a substituent group; R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 each represents a hydrogen atom or a substituent group, provided that at least one among the substituents of R.sup.2 to R.sup.6 represents a group to be eliminated in the form of R.sup.m --H (m=an integer from 2 to 6) under an alkaline condition; X represents a counter ion for adjusting the charge balance; n represents the number of counter ions necessary to adjust the charge balance; and further, any pair of adjacent groups among the substituents from R.sup.1 to R.sup.6 may combine with each other to form a ring.
REFERENCES:
patent: 4859579 (1989-08-01), Hirano et al.
patent: 4871653 (1989-10-01), Inoue et al.
Chea Thorl
Fuji Photo Film Co. , Ltd.
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