摘要:
The present invention provides a method for manufacturing water-using household equipment of which hydrophilicity, surface hardness and appearances are good and the water-using household equipment. The water-using household equipment includes a coat including silicic acid, and a coat constituted by composition of 44 to 97% by mass of Si by SiO 2 conversion, 0.2 to 17% by mass of Li by Li 2 O conversion and 2.4 to 49% by mass of Na by Na 2 O conversion on the coat including the silicic acid on a surface of a substrate. The method for manufacturing water-using household equipment includes: a surface treatment step of treating at least a surface of the substrate contacting water or contacting a water vapor atmosphere with a coating agent including silicic acid and forming a surface treatment layer; and an application step of forming an application layer on the surface treatment layer by applying an aqueous solution including 1 to 20 mass portions of Si by SiO 2 conversion, 0.05 to 0.3 mass portion of Li by Li 2 O conversion and 0.5 to 1 mass portion of Na by Na 2 O conversion.