SILICA ALUMINA COMPOUND SOL, ITS PRODUCING METHODS, AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide a silica alumina compound sol and its producing method which can form an ink acceptor layer superior in ink absorbency, and water and attrition resistances. ;SOLUTION: Silica hydrogel can be obtained either by mixing an alkali silicate with an acid or by adding a salt having cohesion performance of silica to the alkali silicate before mixing with the acid. A silica alumina compound sol can be produced by mixing such a silica hydrogel with an aluminate having an acid property in a water solution.;COPYRIGHT: (C)2001,JPO