Thermal recording medium

Abstract

Abstract PURPOSE:To obtain the title recording medium enabled in fixing by low light energy and capable of preventing background fogging at the time of the irradiation of white light, by using a resin material containing diazonium salt, a coupler forming a color upon the reaction therewith, a heat-meltable base and a cyclodextrin inclusion compound of a cyanine dye. CONSTITUTION:A thermal layer 3 is selectively heated by a thermal head 1 to melt a heat-meltable base 2 and diazonium salt 4 is reacted with a coupling agent 5 in the presence of alkali to enable color forming recording. When the diazonium salt 4 not reacted with the coupling agent 5 is demcomposed after the completion of recording, by allowing a cyclodextrin inclusion compound 8 of a cyanine dye to be present, the photolysis of the diazonium salt 4 receives dye sensitizing action and can be performed even by the irradiation of red light and, therefore, the decomposition speed by the irradiation of white light increases and fixing can be performed. Further, the cyanine dye included by cyclodextrin fades by the irradiation of white light and the background fogging of a recording image can be prevented.

Inventors

• 👤 Kimie Enmanji
• 👤 円満字　公衛
• 👤 Kenji Nomura
• 👤 野村　健次

Bibliographic Details