| 摘要 |
Disclosed is a heat-sensitive recording material comprising a base sheet, a heat-sensitive record layer formed over the base sheet and a water-soluble resin protective layer formed over the heat-sensitive record layer, characterized in that the protective layer contains at least one compound selected from the group consisting of polyaluminumhydroxide represented by the formulas [Al2(OH)aX6-a]n(I) [Al2(OH)a(SO4)(6-a)/2]n(II) wherein X represents halogen ion or NO3-, O<a<6 and 1<n</=20, and a metal salt of unsaturated aliphatic carboxylic acid represented by the formula MbAcYd(III) wherein M represents a metal having a valence of 2, 3 or 4, A represents unsaturated aliphatic carboxylic acid residue, Y represents halogen ion, OH-, SO42- or NO3-, b is an integer of 1 or 2, c is an integer of 1 to 8, d is 0 or an integer of 1 to 8, with the proviso that ck2+dk3=bk1 wherein k1, k2 and k3 are the valences of M, A and Y, respectively.
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