Disclosed is an aqueous composition containing (a) an ethyl acrylate/methyl methacrylate copolymer or a plasticized vinyl accetate polymer, (b) an ethyl cellulose, (c) a water soluble additive for pharmaceutical products, (d) titanium oxide and (c) water. The solid content mass ratio among the components (a), (b) and (c) and (d), namely a: b: c: d is 100: (5-50): (1-50): (0.5-10), and the solid content concentration in the aqueous composition is 0.5-40% by mass.