Fuji Photo Film Company, Limited

Koreshige Ito

Ken Iwakura

Shojiro Sano

Masato Satomura

Katsumi Matsuoka

Heat-sensitive recording material

The present invention discloses a heat-sensitive recording material comprising a thermal recording layer disposed on a substrate which layer contains at least a diazonium salt compound and a coupler which has a coupling reaction with the diazonium salt compound to develop a color, wherein the thermal recording layer microcapsules, which encapsulate the diazonium salt compound, an aromatic carboxylate represented by the following general formula (I) and an aromatic carboxylate represented by the following general formula (II). 

Heat sensitive recording material and microcapsule solution

A recording material containing an electron donating colorless dye capable of undergoing a coloration reaction, wherein a metal salt of a salicylic acid derivative represented by the following formula (I) and a fatty acid derivative having a benzotriazole group as a substituent group or an alcohol derivative having a benzotriazole group as a substituent group are provided on a same support: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represent each hydrogen atom, an alkyl group or an aryl group.

Recording material

A recording medium comprising at least one electron donating colorless dye and at least one electron accepting compound, wherein the electron accepting compound is a salicylic acid compound represented by formula (I): ##STR1## wherein R represents a divalent group; X and Y, which may be the same or different, each represents a hydrogen aotm, an alkyl group, an aryl group, an alkoxy group, or a halogen atom; and Z represents a hydrogen atom, a carboxyl group, an alkyl group, an aryl group, an alkoxy group, or a halogen atom, or a metal salt thereof.

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Shizuoka-ken, Japan

Koreshige Ito