| abstract |
A silver halide emulsion comprises an electron-releasing compound of Types 1 to 4: n (Type 1) a compound capable of undergoing a one-electron oxidation (1-EO) to form a one-electron oxidation product (1-EOP), the 1-EOP capable of releasing further two or more electrons accompanying a subsequent bond cleavage reaction, n (Type 2) a compound capable of undergoing 1-EO to form 1-EOP, the 1-EOP capable of releasing further one electron accompanying a subsequent bond cleavage reaction, and having, in its molecule, two or more adsorptive groups acting on silver halides, n (Type 3) a compound capable of undergoing 1-EO to thereby form 1-EOP, the 1-EOP capable of releasing further one or more electrons after going through a subsequent bond forming process, and n (Type 4) a compound capable of undergoing 1-EO to form 1-EOP, the 1-EOP capable of releasing further one or more electrons after going through a subsequent intramolecular ring cleavage reaction. |