| 摘要 |
PROBLEM TO BE SOLVED: To keep the surface roughness on the surface of a second glaze layer within a specific value and to maintain a function capable of removing stains for a long period with good reproducibility by applying a first glaze raw material containing pigments and/or an opacifier to the surface of an earthenware forming body, then applying a second glaze raw material containing molten silica, silica sand and/or feldspar as an SiO2 component thereto and firing the glaze raw materials. SOLUTION: The first glaze layer is colorable and contains the opacifier (e.g.: zircon) and the pigments. The second glaze layer is transparent and contains the SiO2 component, Al2O3 component, bivalent metal oxide components (e.g.: MgO, CaO, ZnO) and alkali metal oxides (e.g.: K2O, Na2O) as amorphous components. The glaze raw materials are respectively mixed and are pulverized at need by a ball mill, etc. After the coating application of the glaze raw materials, the glaze raw materials are fired at 800 to 1300 deg.C, by which the forming body is sintered and the two glaze layers are fixed. The surface roughness of the second glaze layer is confined to <=0.07μm by a contact surface roughness measuring instrument.
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