Radiation imagery chemistry: process – composition – or product th – Post imaging processing – Positive
Patent
1983-04-14
1984-11-13
Louie, Won H.
Radiation imagery chemistry: process, composition, or product th
Post imaging processing
Positive
430598, 430940, G03C 524, G03C 106
Patent
active
044826273
ABSTRACT:
A direct positive silver halide sensitive material and a method of treating the material are disclosed. The method of treatment comprises providing an exposed direct positive silver halide sensitive material comprised of a base having thereon a compound represented by the general formula (I) and a sensitive silver halide photographic emulsion layer. The material is then developed in the presence of a compound represented by the general formula (II). ##STR1## the substituents within the general formula are defined in the specification. ##STR2## the substituents within this general formula are also defined in the specification. The use of the compounds represented by the general formulae (I) and (II) provide an image with improved sharpness and edge effect. Furthermore, the process can be carried out without substantial variations in the reversal property due to variations in the bromine ion concentration of the developing solution or the pH thereof.
REFERENCES:
patent: 4284717 (1981-08-01), Toya et al.
patent: 4309499 (1982-01-01), Takagi et al.
patent: 4374923 (1983-02-01), Hirano et al.
Hirano Shigeo
Sugimoto Tadao
Takagi Yoshihiro
Fuji Photo Film Co. , Ltd.
Louie Won H.
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