Sanko Chemical Company Ltd.

Kanzaki Paper Manufacturing Co., Ltd.

Daiichiro Tanaka

Toranosuke Saito

Shinichi Oda

Jujiro Kohno

A sensitized sheet for a pressure sensitive copy system is obtained by coating the surface of a support with an acceptor composition comprising a particulate mixture comprising an organic acid substance selected from the group consisting of aromatic carboxylic acids and polyvalent metal salts thereof, and an organic high molecular compound. The above coating composition may further contain an inorganic solid particle such as oxides, hydroxides and carbonates of a polyvalent metal, and other mineral pigments. The coating procedure may be carried out with use of coating means mounted on the conventional paper machines.

Support sheet with sensitized coating of organic acid substance and

In a pressure sensitive recording paper which comprises in combination: a dyestuff precursor or dyestuff precursor solution and a dyestuff acceptor composition which is capable of color formation by reaction with said dyestuff precursor, the dyestuff acceptor consists essentially of a polyvalent metal salt of 3-position-substituted salicylic acid derivatives having at least 12, preferably at least 19 carbon atoms.

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Arao, Japan

Daiichiro Tanaka