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), (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.