| 摘要 |
<p>An ultra-high contrast negative type silver halide photographic material comprising: (1) at least one silver halide emulsion layer on a support; (2) at least one compound selected from among hydrazine derivatives which can be represented by formula (I) below, which is included in said emulsion layer or in another hydrophilic colloid layer, <CHEM> wherein A1 and A2 both represent hydrogen atoms or one represents a hydrogen atom and the other represents a sulfinic acid residual group or an acyl group, R1 represents an aliphatic group, an aromatic group or a heterocyclic group, R2 represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, or an amino group, G1 represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group or an N-substituted or unsubstituted iminomethylene group, and at least one of R1 and R2 has a group which promotes adsorption on silver halide; and (3) at least one compound selected from among the hydrazine derivatives which can be represented by the formula (II) below, which is included in the said emulsion layer or in another hydrophilic colloid layer, <CHEM> wherein A3 and A4 both represent hydrogen atoms or one represents a hydrogen atom and the other represents a sulfinic acid residual group or an acyl group, R3 represents an aliphatic group, an aromatic group or a heterocyclic group, R4 represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group or an amino group, G2 represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or an iminomethylene group, and the total number of carbon atoms in R3 and R4 is at least 13. s</p> |
