TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: The unbridged compound is chosen from unbridged epoxy group-containing compound, unbridged amide group-containing compound, unbridged hydroxyl group-containing compound and unbridged oxazoline group-containing compound.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The aqueous composition further comprises cellulose thickener, and binder composition containing crosslinking-type resin microparticles, and unbridged compound. The cellulose thickener is hydroxyalkyl cellulose. Preferred Process: The anionic dispersant is a copolymer obtained by copolymerizing ethylenic unsaturated monomer (a1) (in weight%) (10-80) having aromatic ring, ethylenic unsaturated monomer (a2) (20-75) having carboxyl group, and ethylenic unsaturated monomer (a3) (0-70) other than monomer (a1) and monomer (a2). The sum total content of the monomer (a1), monomer (a2) and monomer (a3) is 100 weight%. The crosslinking-type resin microparticles are obtained by polymerizing the monomer (C) (0.1-5) chosen from ethylenically unsaturated monomer (c1) having monofunctional or polyfunctional alkoxysilyl group, and/or monomer (c2) having two or more ethylenically unsaturated group in a molecule, and ethylenically unsaturated monomer (c3) (95-99.9) other than the monomer (c1) and monomer (c2), by radical polymerization initiator in water in presence of surfactant. The sum total content of the monomer (c1), monomer (c2) and monomer (c3) is 100 weight%. The monomer (c3) contains monomer (C1) (0.1-20) chosen from ethylenically unsaturated monomer (c4) having monofunctional or polyfunctional epoxy group, ethylenically unsaturated monomer (c5) having monofunctional or polyfunctional amide group, and ethylenically unsaturated monomer (c6) having monofunctional or polyfunctional hydroxyl group, and ethylenically unsaturated monomer (c7) (75-99.8) other than monomer (c1), monomer (c2), and monomers (c4)- (c6). The monomer (c7) contains monomer (C2) (30-95) chosen from ethylenically unsaturated monomer (c8) having 8-18C alkyl group, and ethylenically unsaturated monomer (c9) having cyclic structure, and ethylenically unsaturated monomer (0-69.8) (c10) other than the monomers (c1)-(c6), monomer (c8), and monomer (c9).