| 摘要 |
PURPOSE:To provide a printed matter having a color forming region changing from a colorless state to a colored state by applying a color forming aid and adapted to education and-amusement attractive inclusive of a hue. CONSTITUTION:A color forming aid is used as a compd. selected from zinc salicylate, bisphenol A, an inorg. acid and an org. acid along with a color former selected from crystal violet lactone, malachite green lactone, 1,3-dimethyl-6- diethylaminofluorane, 6-diethylamino-benzo[alpha]-flnorane, 3- cyclohexylmethylamino-6-methyl-7-anilinofluorane, benzoyl leuco methylone blue, ethyl leuco methylene blue, methoxybenzyl leuco methylene blue, 2-(phenyliminoethanedilydene)-3,3-trimethyl-indoline, 1, 3, 3-trimethyl-indolino-7'- chloro-beta-naphthospiropyrane, di-beta-naphthospiropyrane, N-acetylauramine, N- phenylauramine and rhodamine B lactam. |
