| 摘要 |
PURPOSE:To enhance surface easy slip properties without damaging printing quality by forming an alumina, hydrate porous layer having predetermined thickness on a base material and forming a silica gel layer having a predetermined thickness and specific in the height difference of surface unevenness on the porous layer or the surface having no porous layer formed thereon of the base material. CONSTITUTION:An alumina hydrate porous layer (porous layer) 2 with a thickness of 1-100mum is formed on a base material 1 and a silica gel layer 3 having a thickness of 0.1-30mum and characterized by that the height difference of surface unevenness is 0.1mum or more is formed on the porous layer 2 or the surface having no porous layer 2 formed thereon of the base material 1. When pores with a diameter of about 1-10nm are formed to the porous layer 2 and the volume of them is set to about 0.3-1.0cc/g, sufficient absorbability and transparency are obtained. As alumina hydrate, pseudo boehmite is pref. from the aspect of ink absorbability and dye fixing properties. The silica gel layer 3 is pref. formed by applying a silica sol to which a binder is added. |
