| 摘要 |
PURPOSE:To manufacture the titled copying paper which is excellent in smoothness and the strength of the surface and has few smudges by preparing an applying liquid for a developing agent sheet by using micro-capsules containing an electron dative colorless organic compound, activated white earth and CaCO3. CONSTITUTION:An applying liquid for a developing agent sheet is prepared in such a manner that 5-25wt% CaCO3 with 0.1-10mu particle diameters is dispersed into an aqueous solution containing a dispersant such as PVA, 95-75wt% activated white earth containing a dispersant such as sodium pyrophosphoric acid is added and sufficiently dispersed, and micro-capsules containing an electron dative colorless organic compound are added and dispersed. Carbon-less copying paper is obtained by applying the applying liquid onto a supporting material. |
