| 摘要 |
PURPOSE:To make concealing and presentation of recorded contents easy by a method wherein a thermal recording layer, a peelable intermediate layer which contains an aqueous high polymer, and a concealing layer of which opacity is specific value or higher are successively laminated on a base material. CONSTITUTION:A color developing agent or the like such as colorless or light- colored basic dye, activated clay, etc., are added into aqueous solution of a binder such as polyvinyl alcohol or the like, and mixed to prepare coating liquid for thermal recording layer. Aqueous high polymers of hydroxyethyl cellulose, casein, etc., are dissolved in water to prepare coating liquid for intermediate layer. A specific amount of an inorganic or organic and white or colored pigment is added into the aqueous solution of the binder such as polyvinyl alcohol or the like, and mixed to prepare coating liquid for concealing layer. The coating liquid for thermal recording layer is applied onto base materials of synthetic resin, non-woven fabric, etc., and dried to form a thermal recording layer. Thereafter, the coating liquid for intermediate layer is applied thereon, and dried to laminate an intermediate layer. The liquid for concealing layer is applied on the intermediate layer, and dried to laminate a concealing layer which is 90% or higher in opacity measured by JIS P-8138. |
