Shin Nisso Kako Co., Ltd.

Shoichi Horiuchi

Tetsuo Igaki

Teruo Suzuki

Masakichi Yahagi

Kazuyuki Horisawa

Takahumi Toyama

Mituhiro Shoji

Akio Kashiwagi

Certain 3-piperidino fluoran derivatives useful as color recording materials are disclosed.

Chromogenic fluoran derivatives

Certain 3-substituted amino-7-substituted fluoran derivatives useful as color recording materials.

Chromogenic fluoran derivatives and the preparation and use thereof

A recording material which is suitable as a pressure-sensitive or heat-sensitive copying paper or recording paper by developing a color in contact with an electron-accepting material which comprises certain fluoran derivatives containing piperidino, pyrrolidino, morpholino and cycohexylamino groups.

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Fujimi, Japan

Shoichi Horiuchi