| abstract |
An additive for photography represented by formula (I):n n wherein R₁ is an aliphatic hydrocarbon group, an aryl group, or a heterocyclic ring group; R₂ is hydrogen, an aliphatic hydrocarbon group, an aryl group, or a heterocyclic ring group; L₁, L₂, L₃, L₄ and L₅ are independently an alkylene group; m and n are independently 0 or 1; W¹ and W² are independently an alkylene group, an arylene group, aralkylene group or a divalent nitrogen-containing heterocyclic ring group; D is a single bond, -O-, -S- or -N(R w )-, where R w is hydrogen, an aliphatic hydrocarbon group or an aryl group; v is 0 or an integer of from 1 to 3; w is an integer of from 1 to 3; and M₁, M₂, M₃ and M₄ are independently hydrogen or a cation, photographic processing composition and a processing process using the same. |