Heat-sensitive record material
AssigneeKanzaki Paper Manufacturing Co., Ltd.
InventorsMunetaka Morita, Takuji Tuji, Katsuhiko Ishida
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Abstract
In a heat-sensitive record material comprising a base sheet having a color developing layer which includes finely divided particles of colorless chromogenic material and finely divided particles of acceptor, the colorless chromogenic material exists in the color developing layer in an amorphous state.
Claims4
In a heat-sensitive record material comprising a base sheet having a color developing layer which includes finely divided particles comprising colorless chromogenic material and finely divided particles comprising acceptor which is reactive with said colorless chromogenic material to develop a color, the improvement that said colorless chromogenic material exists in said color developing layer in an amorphous state, said colorless chromogenic material in an amorphous state being one obtained by heating a colorless chromogenic material or colorless chromogenic composition which comprises at least one colorless chromogenic material, in a crystalline state to form a melt and then cooling said melt.
Dependencies are inferred from the claim text.