Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Two or more radiation-sensitive layers containing other than...
Patent
1985-12-24
1988-04-26
Goodrow, John L.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Two or more radiation-sensitive layers containing other than...
430566, 430957, G03C 140, G03C 554
Patent
active
047404531
ABSTRACT:
A silver halide photosensitive material is described, comprising a support and at least one silver halide emulsion layer, wherein said emulsion layer or another layer contains a compound represented by formula (I) ##STR1## wherein X represents an atomic group forming a redox center of benzene type having substituents by linking with C.sub.A and C.sub.B, and which does not enable Time-PUG to be released until the redox center is oxidized during development processing; EWG represents an electron withdrawing group having a Hammet's .sigma. para value exceeding 0.3; C.sub.A and C.sub.B each represents a carbon atom; R.sub.1 and R.sub.2 each represents a hydrogen atom or a suitable substituent; Time represents a timing group connecting to C.sub.B through a sulfur, nitrogen, or selenium atom thereof, t is an integer of 0 or 1, and when t=0, Time is a chemical bond; PUG represents a photographically useful group and connects to C.sub.B through a sulfur, nitrogen, or selenium atom thereof when t=0; and n is an integer of 0 or 1.
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Hirano Shigeo
Ikeda Tadashi
Itoh Isamu
Kuwabara Ken-ichi
Mihayashi Keiji
Fuji Photo Film Co. , Ltd.
Goodrow John L.
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