Patent ID: 6677113
Filing Date: 2004-01-13
Classification: C09B,G03C

Abstract:
A silver halide photographic material comprising a support having thereon at least a photosensitive layer containing a silver halide emulsion layer, wherein said photosensitive layer contains at least a compound represented by the following formula (3) or (4) wherein Y21, Y22 and Y31 each are independently an oxygen atom, a sulfur atom, a selenium atom, â€”C(Ra) (Rb)â€” group or â€”CH&boxH;CHâ€” group, in which Ra and Rb each are a hydrogen atom, a lower alkyl group or an atomic group necessary to form an aliphatic spiro ring between Ra and Rb; R21, R22, R31 and R32 each are independently an aliphatic group; Rc and Rd each are independently an unsubstituted lower alkyl group, a cycloalkyl group, an aralkyl group, an aryl group or a heterocyclic group; W21, W22, W23, W24, W31, W32, W33 and W34 each are independently a hydrogen atom, a substituent or a non-metallic atom group necessary to form a condensed ring by bonding between W21 and W22, W23 and W24, W31 and W32, or W33 and W34; V21 to V29, and V31 to V33 each are independently a hydrogen atom, a halogen atom, an amino group, an alkylthio group, an arylthio group, a lower alkyl group, a lower alkoxy group, an aryl group, an aryloxy group, a heterocyclic group or a non-metallic atom group necessary to form a 5- to 7-membered ring by bonding between V21 and V23, V22 and V24, V23 and V25, V24 and V26, V25 and V27, V26 and V28, V27 and V29, or V31 and V33; X21 and X31 each are an ion necessary to compensate for an intramolecular charge; 121 and 131 each an ion necessary to compensate for an intramolecular charge; k21 and k22 each are 0 or 1; n21, n22, n31 and n32 each are 0, 1 or 2, provided that n21 and n22, or n31 and n32 are not 0 at the same time.