Nitto-Denko Corporation

Nippon Kasei Chemical Company Limited

Yutaka Nakabayashi

Seiji Kondo

Yoshihiro Hieda

Akinori Kameyama

Jun Wada

Katsuhisa Hamano

A reversible heat-sensitive recording medium comprising

Reversible heat-sensitive recording medium

A reversible heat-sensitive recording composition capable of repeatedly writing or erasing, and a reversible heat-sensitive recording sheet using the composition are disclosed. The reversible heat-sentitive recording composition comprising a leuco compound as a coloring agent and a pyridine derivative having at least one substituent selected from the group consisting of a carboxyl group and a phenolic hydroxyl group.

Reversible heat-sensitive recording composition and reversible

The present invention discloses an electroluminescent element comprising spherical spacer particles in a luminescent layer having a dielectric constant of not less than 10 at 1 KHz and 25.degree. C. and an insulator layer having a dielectric constant of not less than 10 at 1 KHz and 25.degree. C. which both layers are disposed between a transparent electrode and a back electrode, either of said luminescent layer or of said insulator layer having been produced by forming a phosphor paste layer or an insulative paste layer and solidifying each with radiation, respectively.

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Osaka, Japan

Yutaka Nakabayashi