Silver halide photosensitive material

A silver halide photosensitive material containing at least one compound selected from the following compounds of Types 1 to 4, and at least one reducing compound:

• (Type 1) a compound capable of undergoing a one-electron oxidation to thereby form a one-electron oxidation product thereof, wherein the one-electron oxidation product is capable of releasing further two or more electrons accompanying a subsequent bond cleavage reaction;
• (Type 2) a compound capable of undergoing a one-electron oxidation to thereby form a one-electron oxidation product thereof, wherein the one-electron oxidation product is capable of releasing further one electron accompanying a subsequent bond cleavage reaction, and the compound having, in its molecule, two or more groups absorptive to silver halide;
• (Type 3) a compound capable of undergoing a one-electron oxidation to thereby form a one-electron oxidation product thereof, wherein the one-electron oxidation product is capable of releasing further one or more electrons after going through a subsequent bond forming process;
• and
• (Type 4) a compound capable of undergoing a one-electron oxidation to thereby form a one-electron oxidation product thereof, wherein the one-electron oxidation product is capable of releasing further one or more electrons after going through a subsequent intramolecular ring cleavage reaction,
• wherein the reducing compound is a compound selected from hydroxyamines;
• hydroxamic acids;
• hydroxyureas;
• hydroxyurethanes;
• hydroxysemicarbazides;
• phenols;
• phenidons;
• hydrazines and reductons.

A silver halide photosensitive material containing at least one compound selected from the following compounds of Types 1 to 4, and at least one reducing compound:

• (Type 1) a compound capable of undergoing a one-electron oxidation to thereby form a one-electron oxidation product thereof, wherein the one-electron oxidation product is capable of releasing further two or more electrons accompanying a subsequent bond cleavage reaction;
• (Type 2) a compound capable of undergoing a one-electron oxidation to thereby form a one-electron oxidation product thereof, wherein the one-electron oxidation product is capable of releasing further one electrons accompanying a subsequent bond cleavage reaction, and the compound having, in its molecule, two or more groups absorptive to silver halide;
• (Type 3) a compound capable of undergoing a one-electron oxidation to thereby form a one-electron oxidation product thereof, wherein the one-electron oxidation product is capable of releasing further one or more electrons after going through a subsequent bond forming process;
• and
• (Type 4) a compound capable of undergoing a one-electron oxidation to thereby form a one-electron oxidation product thereof, wherein the one-electron oxidation product is capable of releasing further one or more electrons after going through a subsequent intramolecular ring cleavage reaction,
• wherein, the reducing compounds described are classified into three classes consisting of:
• a class of compounds having an adsorptive group,
• a class of compounds having a ballast group, and
• a class of diffusive compounds having none of the both adsorptive and ballast groups, compounds of two or three classes are selected from the three classes and used in the photosensitive material.