Radiation imagery chemistry: process – composition – or product th – Silver halide colloid tanning process – composition – or product
Patent
1993-11-16
1995-06-06
Neville, Thomas R.
Radiation imagery chemistry: process, composition, or product th
Silver halide colloid tanning process, composition, or product
430434, 430598, G03C 106
Patent
active
054222249
ABSTRACT:
A photographic material comprises a support and at least one photosensitive layer which comprises a non-chemically sensitized silver halide emulsion containing at least 80 mol % silver chloride based upon the total amount of silver halide in the emulsion. The photosensitive layer or another hydrophilic colloid layer comprises a hydrazine derivative represented by the following General Formula (I): ##STR1## In this formula A.sub.1 and A.sub.2 both represent hydrogen atoms, or one represents a hydrogen atom and the other represents a sulfinic acid group or an acyl group; R.sup.1 represents an aliphatic group, an aromatic group or a heterocyclic group, and R.sup.1 may or may not be substituted; G represents --CO--, --SO.sub.2 --, --SO--, --COCO--, thiocarbonyl, iminomethylene or --P(O)(R.sup.4) group; R.sup.2 represents a substituted or unsubstituted alkyl group, aryl group, heterocyclic group, amino group, alkoxy group or aryloxy group; at least one of R.sup.1 and R.sup.2 is a group which promotes adsorption of the hydrazine derivative onto silver halide; R.sup.4 represents a hydrogen atom, an aliphatic group, an aromatic group, an alkoxy group, an aryloxy group or an amino group.
The photographic material is subjected to developing in a developer which has a pH of at least 9.0 but no more than 11.0 and which contains at least 0.15 mol/liter of sulfite.
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patent: 5279919 (1994-01-01), Okamura et al.
Fuji Photo Film Co. , Ltd.
Neville Thomas R.
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