| 摘要 |
PROBLEM TO BE SOLVED: To prevent adhesion of dirt to sanitary ware so as to suppress deterio ration of gloss on its surface by preparing a glaze material by mixing a transpar ent glaze material including no pigment nor opacifier with a coloring constituent including SnO2 at a specific ratio to the total of both constituents, applying the glazing material to sanitary ware forming base material for forming a glazed body, and burning the glazed body at a specific temperature. SOLUTION: A glaze including of the glaze material composed of SnO2 as an opacifier and other pigments is applied to a sanitary ware forming base material, and the glazed base material is burnt at 800-1300 deg.C. Alternatively, a glaze including a glazing material composed of an amorphous glaze, SnO2 as an opacifier and other pigments is applied to a ware base material, and the glazed base material is burnt at 800-1300 deg.C. Especially, SnO2 has no characteristic to shift to the glaze surface and the like during the burning process, so that an uneven part forming constituent based on corrosion of glass under an alkaline environment can be reduced. Especially, if a ratio of SnO2 to the whole metal constituents in the glaze is set 5.0 wt.% or higher, sufficient effect can be exhibited. Consequently, sanitary ware hardly affected by sticking dirt and provided with durable gloss can be provided.
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