| 摘要 |
PROBLEM TO BE SOLVED: To form a recording sheet having easy production control, superior crack preventiveness and absorptiveness by providing a porous ink absorption layer containing boehmite and polyvinyl alcohol on the surface of a base material treated by one or more kind of boric acid and borate and a surface treating agent. SOLUTION: The surface of a base material is treated by one or more kind selected from a group consisting of boric acid, borate, and a paper treating agent, and coating liquid consisting of boehmite and polyvinyl alcohol is applied on the treated surface to form a porous ink absorption layer. As such a base material, there is used paper, synthetic paper or plastics. Surface treatment is conducted with a mixture of boric acid or the like and a paper surface treating agent, or such that surface treatment with boric acid or the like is carried out in advance, and then surface treatment with a paper treating agent is performed. Such boric acid or the like is set in 0.5-1.5 g/m<2> per unit area of the base material in terms of H3 BO3 . |
