Abstract: A manufacturing method of tiles includes the steps of: preparing mixed powder having a water content of 2 to 7% by mixing 30 to 80 parts by weight of calcium hydroxide powder or dolomite plaster powder, 20 to 70 parts by weight of porous aggregate, 0.1 to 5 parts by weight of a first photocatalyst and water; filling the mixed powder into a mold of a molding machine; forming a formed body by pressurizing the filled mixed powder; curing the formed body in a carbon dioxide atmosphere; and forming a thin layer made of a second photocatalyst on a surface of the formed body.

Abstract: A manufacturing method of tiles includes the steps of: preparing mixed powder having a water content of 2 to 7% by mixing 30 to 80 parts by weight of calcium hydroxide powder or dolomite plaster powder, 20 to 70 parts by weight of porous aggregate, 0.1 to 5 parts by weight of a first photocatalyst and water; filling the mixed powder into a mold of a molding machine; forming a formed body by pressurizing the filled mixed powder; curing the formed body in a carbon dioxide atmosphere; and forming a thin layer made of a second photocatalyst on a surface of the formed body.

Abstract: A method of patterning the surface of a molded article obtained by pressure-molding a powdery inorganic binder material which comprises vibrating the powdery inorganic binder material to thereby smoothen the surface thereof, then disposing a colored material having a different color from the inorganic binder material on the surface of the inorganic binder material and then pressure-molding the inorganic binder material together with the colored material to thereby form a pattern on the surface of the molded article. Thus, a pattern can be conveniently and economically formed on the surface of a molded article.