| abstract |
PURPOSE: The titled composition which is colored by light irradiation and has coloring seeds in abundance, durability to heat and water vapor and improved shelf stability, comprising an electron donative coloring organic compound and a specific light activator such as aromatic phosphonium organic acid salt, etc., as essential components. n CONSTITUTION: The aimed composition containing (A) an electron donative coloring organic compound (preferably triphenylmethanephthalide, fluoran, phenothiazine, indolylphthalide, leucoauramine, rhodamine lactam, rhodamine lactone, indoline, triphenylmethane, azaphthalide, chromenoindole or triazene) and (B) a light activator (preferably organic acid salt is organic sulfonic acid, organic boric acid, carboxylic acid or phenol) selected from an aromatic phosphonium organic acid salt, aromatic oxonium organic acid salt, aromatic sulfonium organic acid salt and aromatic iodonium organic acid salt. n COPYRIGHT: (C)1987,JPO&Japio |