Patent ID: 8314175

Claim:
An aqueous composition for a recording medium comprising, a polyvinyl alcohol-based resin (A) having an average saponification degree of 80 to 89 mol % and an average polymerization degree of 1700 to 3000, and containing a polyvinyl alcohol (A1) having a 1,2-diol structural unit on a side chain thereof represented by formula (1), wherein each of R 1 , R 2 , and R 3 independently represents a hydrogen atom or an alkyl group, and R 4 represents a single bond or an alkylene group having 1 to 3 carbon atoms, and n represents 0 or a positive integer; an inorganic microparticle (B); and a boron compound (C), wherein a content of the boron compound (C) is in the range of 2 to 10 parts by mass based on 100 parts by mass of the polyvinyl alcohol-based resin (A).