| 摘要 |
PURPOSE:To obtain a developing sheet for pressure-sensitive recording of which the coloring density of an image is high and, moreover, of which the coloring rate is high. CONSTITUTION:A developer layer containing a salicylic acid derivative or a zinc salt thereof is made to contain a binder of a copolymer constituted mainly of acrylamide of a molecular weight 500000 to 1000000 or a binder in which the ratio of polymerization among the acrylamide, acrylonitrile and an acrylic acid is in the range of 65:30:5 to 90:5:5 in the weight ratio. |
