THERMO-SENSITIVE RECORDING BODY

PURPOSE:To form the thermo-sensitive recording body which can be fixed by light by making a diazonium compound contain in a thermo-sensitive recording layer in an acylated leucomethylene blue compound group. CONSTITUTION:The thermo-sensitive recording body is manufactured in such a manner that a potential developer (a) (an acidic substance liberating nitric acid through heating such as ammonium nitrate), a color developer (b) (the acylated leucomethylene blue compound which reacts with nitric acid and develops a color), a light fixing agent (c) (the diazonium compound, which inactivates said potential developer through light irradiation, such as 4-diazo-N, N-diethyl aniline) and the thermo-sensitive recorder layer containing a high molecular binding agent (d) are formed on a supporter. A picture can be shaped by said recording body by using a thermal head, a heat pen, etc., and the picture can be fixed as a thermally stable permanent picture by exposing the whole surface after the picture is recorded.