| 摘要 |
PURPOSE:To provide a thermal recording material having high whiteness and excellent sensitivity and imparting good image stability by providing a color forming layer having a two-layer structure consisting of an upper layer composed of a color forming system using an electron donating dye precursor and a lower layer composed of a color forming layer containing a metal salt compound. CONSTITUTION:A first color forming layer containing an iron salt of 18-35C higher fatty acid and a gallic acid derivative represented by formula I (wherein R is a 10-20C alkyl group) is provided on a sheet support and a second color forming layer containing an electron donating dye precursor and an electron acceptive developer is formed on the color forming layer. As the gallic acid derivative represented by the formula I, one reacting with a metal salt compound under heating to form a colored metal chelate can be arbitrarily selected and lauryl gallate or stearyl gallate is used. As the electron acceptive developer used in the second color forming layer, a phenol derivative and an aromatic carboxylic acid derivative are pref. and bisphenols are especially pref. |
