Radiation imagery chemistry: process – composition – or product th – Color imaging process – Using identified radiation sensitive composition in the...
Patent
1985-03-12
1986-06-10
Kittle, John
Radiation imagery chemistry: process, composition, or product th
Color imaging process
Using identified radiation sensitive composition in the...
430387, 430553, 430555, 430557, 430558, 430955, G03C 700, G03C 108, G03C 716, G03C 732
Patent
active
045943133
ABSTRACT:
A color image forming process which comprises developing a silver halide photographic material using an aromatic primary amine developing agent in the presence of a blocked magenta image forming coupler represented by the following general formula (I): ##STR1## wherein R represents a hydrogen atom or a substituent; X represents a hydrogen atom, a halogen atom, a carboxy group or a coupling releasable group; Cp represents a coupling block group capable of forming a colorless or alkali-soluble product by reaction with the oxidation product of a color developing agent; A represents ##STR2## when Cp is bonded and --N.dbd. when Cp is not bonded; B and E each represents ##STR3## when Cp is bonded and --N.dbd. or ##STR4## when Cp is not bonded; D represents --N.dbd. or ##STR5## (wherein R has the same significance as defined above and said Rs in said D and B and E may be the same or different); and represents three movable double bonds; said Cp is nit, however, bonded to E when A, D and E simultaneously contain a nitrogen atom and B contains a carbon atom; said coupler may form a dimer or more oligomers at R or X; and said substituent Rs on adjacent carbon atoms may form a ring with each other. The color image forming process uses a blocked magenta color image forming coupler having high coloring speed and maximum coloring density and excellent stability.
REFERENCES:
patent: 4076533 (1978-02-01), Ota et al.
patent: 4283472 (1981-08-01), Gompf et al.
patent: 4304845 (1981-12-01), Fujimatsu et al.
patent: 4310618 (1982-01-01), Fernandez et al.
patent: 4338393 (1982-07-01), Bailey et al.
patent: 4477563 (1984-10-01), Ichijima et al.
"Blocked Dye-Forming Couplers" Research Disclosure, Jul. 1981, #20714.
"Blocked Pyrazolone Magenta Dye-Forming Coupler" Research Disclosure, Jul. 1980, #19536.
Furutachi Nobuo
Yoshida Yoshinobu
Fuji Photo Film Co. , Ltd.
Kittle John
Shah Mukund J.
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