| 摘要 |
PURPOSE:To remove the odor and improve an ecological safety by a method herein a glyceride is used as a solvent, and a fluorane compound shown by a specific formula as an electron donative color former is dissolved in the solvent and encapsulated in microcapsules. CONSTITUTION:A fluorane compound shown by a formula as an electron donative color former is dissolved in a glyceride, such as 1-monocaprin or 1- monoundecanoin, used as a solvent. This solution is encapsulated in microcapsules for forming a color former layer. In the formula, R<1> is 1-4C alkyl group; R<2> is 4-12C branched chain alkyl group or tetrahydrofurfuryl group; R<1> and R<2> cannot be the same; and R<3> and R<4> independently represent hydrogen atom, halogen atom, or methyl group. |
