| 摘要 |
PURPOSE:To contrive enhancement of a smudging-preventing effect and color forming property, by providing a coated layer comprising a fine cellulose powder and mono-core microcapsules comprising an amino resin as a film material and having a specified volume average particle diameter. CONSTITUTION:In a system using a fine cellulose powder, the average particle diameter of mono-core microcapsules comprising an amino resin as a film material is set to be 6-10mum, whereby a favorable upper layer paper can be obtained in which the smudging-preventing effect of the fine cellulose powder is remarkably enhanced and which has excellent color forming property. By controlling the fine cellulose powder so that a fraction thereof having a length of not larger than 100mum constitutes not less than 98% of the total amount, it is possible to enhance the smoothness of the coated surface and to lower the viscosity of a coating liquid. The amino resin may be a urea-formaldehyde resin or the like. An electron-acceptive substance for forming a developed color image by making contact with a dye may be acid clay, activated clay or the like. |
