| 摘要 |
PURPOSE:To obtain a bleaching sheet having superior shelf stability and high silver and dye bleaching activity and giving a dye image with superior stability by forming a layer contg. a silver halide complexing agent, Al ions and a binder on a support. CONSTITUTION:At least one layer contg. a silver halide complexing agent, Al ions and a binder is formed on a support. A compound to be used as a source for Al ions is aluminum sulfate, aluminum potassium alum, aluminum ammonium alum or the like. Thiourea or a thiourea deriv, is suitable for use as the silver halide complexing agent. The thiourea deriv, is N-methylthiourea, N-ethyl- N'-n-propylthiourea or the like, and it is preferable that the deriv. is soluble in water. Paper or a film of polyester, polycarbonate or the like is suitable for use as the support. |
