Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1976-10-08
1981-12-29
Brown, J. Travis
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430588, G03C 114
Patent
active
043083455
ABSTRACT:
A silver halide photographic emulsion selectively spectrally sensitized, particularly to red light, with a combination of at least one sensitizing dye represented by general formula (I): ##STR1## wherein Z.sup.1 and Z.sup.2 each represents the atoms necessary to form a benzothiazole nucleus or a benzoselenazole nucleus, R.sup.1 and R.sup.2 l each represents an alkyl group or a substituted alkyl group, wherein at least one of R.sup.1 or R.sup.2 should represent a sulfo group-containing substituted alkyl group, a carboxyalkyl group or a hydroxyalkyl group, R.sup.3 represents an alkyl group, X.sub.1 represents an acid anion, and m represents 1 or 2, wherein m equals 1 when the dye forms an intramolecular salt (betaine-like structure); at least one sensitizing dye represented by general formula (II): ##STR2## wherein Z.sup.3 represents a sulfur atom or a selenium atom, Z.sup.4 represents the atoms necessary to form a benzothiazole nucleus, a benzoselenazole nucleus, a naphtho[1,2-d]thiazole nucleus or a naphtho[1,2-d]selenazole nucleus, R.sup.4 and R.sup.5 each represents an alkyl group or a substituted alkyl group, wherein at least one of R.sup.4 or R.sup.5 should be a sulfo group-containing substituted alkyl group, a carboxyalkyl group or a hydroxyalkyl group, R.sup.6 represents an alkyl group, an aryl group, a furyl group or a thienyl group, X.sub.2 represents an acid anion, and n represents 1 or 2, wherein n equals 1 when the dye forms an intramolecular salt (betaine-like structure), and at least one benzimidazolothiacarbocyanine dye, which exhibits increased color reproducibility, high sensitivity and reduced residual coloration.
REFERENCES:
patent: 3463640 (1969-08-01), Ficken et al.
patent: 3922170 (1975-11-01), Shiba et al.
patent: 3932186 (1976-01-01), Borror et al.
Hayashi Jun
Hinata Masanao
Iwamoto Atsuo
Sato Akira
Takei Haruo
Brown J. Travis
Fuji Photo Film Co. , Ltd.
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