Reversible thermosensitive recording materials

A reversible thermosensitive recording material comprising a support with a thermosensitive layer whose transparency reversibly changes depending on the temperature, said layer consisting essentially of a resin matrix, an organic low molecular weight substance dispersed in the resin matrix and at least one additive selected from the group consisting of:

• a polyhydric alcohol higher fatty acid ester, a polyhydric alcohol higher alkylether, a lower olefin oxide addition product of a polyhydric alcohol higher fatty acid ester, a higher alcohol, a higher alkylphenol, a higher fatty acid, a higher alkylamine, a higher fatty acid amide, a fat, an oil, propylene glycol, acetylene glycol, a sodium salt of a higher alkylbenzenesulfonic acid, a calcium salt of a higher alkylbenzenesulfonic acid, a barium salt of a higher alkylbenzenesulfonic acid, a magnesium salt of a higher alkylbenzenesulfonic acid, a calcium salt of a higher fatty acid, a barium salt of a higher fatty acid, a magnesium salt of a higher fatty acid, an aromatic carboxylic acid, a higher aliphatic sulfonic acid, an aromatic sulfonic acid, a sulfuric mono-ester, a phosphoric mono-ester, a phosphoric diester, a lower sulfonated oil, a long-chain alkyl acrylate polymer, an acrylate oligomer, a long-chain alkyl methacrylate polymer, a long-chain alkyl methacrylate-amine copolymer, a styrene-maleic anhydride copolymer and an olefinmaleic anhydride copolymer.