| 摘要 |
PROBLEM TO BE SOLVED: To obtain a sanitary ware capable of readily removing stain and reducing difference in color tone at a boundary between a part composed only of a glaze layer of a first layer and a part provided with a glaze layer of a second layer by forming the first colorable glaze layer comprising a pigment containing Fe and coloring in red on the surface of ware substrate and making a second transparent glaze layer on a part of the first layer. SOLUTION: A raw material of first colorable glaze layer is mixed by a ball mill, etc., and, if required, ground. Then a transparent glaze not containing a pigment and an opacifier is prepared. For example, a mixture of natural mineral particles of silica sand, feldspar, limestone, etc., is compounded with an amorphous glaze by a ball mill, etc., so as to make the ratio of the amorphous glaze to the total of both the components preferably 60-90% and, if required, the mixture is ground. Then, the surface of a sanitary ware molding product precoated with a colorable glaze is partially glazed with the transparent glaze to form a surface smooth functional layer. The two glaze layers are fixed by baking to form surface smoothness.
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