Sanitary earthen products

A sanitary ware comprising a sanitary ware body and a glaze layer as an outermost layer of the sanitary ware;

• the glaze layer as the outermost layer is a transparent glaze layer which is substantially free from the opacifiers and/or pigments, and the sanitary ware further comprises a colored glaze layer as an intermediate layer provided between the sanitary ware body and the glaze layer as the outermost layer, and
• the surface of the glaze layer as the outermost layer has a surface roughness Ra of less than 0.07 μm as measured with a stylus type surface roughness tester according to JIS B 0651 (1996), furthermore;
• the content, as measured by X-ray photoelectron spectroscopy from the surface of the outermost layer, of a monovalent metal component and/or a metal component having a measure of the electronegatively based on Pouling's rule of not more than 1 in the glaze layer as the outermost layer is less than 30% by weight in terms of oxide based on the whole metal component in the glaze layer as the outermost layer;
• wherein the metal component is releasable evenly and continuously, over the whole surface of the glaze layer as the outermost layer, in an amount effective to impart a self-cleaning function for releasing stains or soils to the surface of the glaze layer as the outermost layer, and the metal component is supplied from the glaze layer as the outermost layer and/or the sanitary ware body to the whole surface of the glaze layer as the outermost layer.

A sanitary ware comprising a sanitary ware body and a glaze layer as an outermost layer of the sanitary ware;

• the sanitary ware further comprises a metal component layer which comprises the metal component as a main component, between the sanitary ware body and the glaze layer as the outermost layer;
• the glaze layer as the outermost layer is substantially free from opacifiers and/or pigments or, alternatively, an average particle diameter of particles which comprise the glaze layer as the outermost layer is not more than 6.0 μm if the glaze layer as the outermost layer contains opacifiers and/or pigments, and
• the surface of the glaze layer as the outermost layer has a surface roughness Ra of less than 0.07 μm as measured with a stylus type surface roughness tester according to JIS B 0651 (1996);
• whereby the metal component is provided so as to be releasable evenly and continuously, over the whole surface of the glaze layer as the outermost layer, in such an amount large enough to impart a self-cleaning function for releasing stains or soils to the surface of the glaze layer as the outermost layer, and the metal component is suppliable from the glaze layer as the outermost layer and/or the sanitary ware body and the metal component layer to the whole surface of the glaze layer as the outermost layer.

A sanitary ware comprising a sanitary ware body and a glaze layer as an outermost layer of the sanitary ware;

• the glaze layer as the outermost layer is a transparent glaze layer which is substantially free from opacifiers and/or pigments;
• the sanitary ware further comprises, provided between the sanitary ware body and the glaze layer as the outermost layer, a colored glaze layer as an intermediate layer provided on the sanitary ware body side and metal component layer which comprises the metal component as a main component, provided on the side of the glass layer as the outermost layer, and
• the surface of the glaze layer as the outermost layer has a surface roughness Ra of less than 0.07 μm as measured with a stylus type surface roughness tester according to JIS B 0651 (1996);
• whereby the metal component is provided so as to be releasable evenly and continuously, over the whole surface of the glaze layer as the outermost layer, in such an amount large enough to impart a self-cleaning function for releasing stains or soils to the surface of the glaze layer as the outermost layer, and the metal component is suppliable from the glaze layer as the outermost layer and/or the sanitary ware body and the metal component layer to the whole surface of the glaze layer as the outermost layer.

A sanitary ware comprising a sanitary ware body and a glaze layer as an outermost layer of the sanitary ware;

• the sanitary ware further comprises, provided between the sanitary ware body and the glaze layer as the outermost layer, a metal component layer which comprises the metal component as a main component, provided on the sanitary ware body side and a colored glaze layer as an intermediate layer provided on the side of the glaze layer as the outermost layer;
• the glaze layer as the outermost layer is a transparent glaze layer which is substantially free from opacifiers and/or pigments, and
• the surface of the glaze layer as the outermost layer has a surface roughness Ra of less than 0.07 μm as measured with a stylus type surface roughness tester according to JIS B 0651 (1996);
• whereby the metal component is provided so as to be releasable evenly and continuously, over the whole surface of the glaze layer as the outermost layer, in such an amount large enough to impart a self-cleaning function for releasing stains or soils to the surface of the glaze layer as the outermost layer, and the metal component is suppliable from the glaze layer as the outermost layer and/or the sanitary ware body and the metal component layer to the whole surface of the glaze layer as the outermost layer.

A sanitary ware comprising:

• a sanitary ware body;
• a glaze layer as an outermost layer of the sanitary ware;
• and
• a metal component layer, comprising the metal component as a main component, provided between the sanitary ware body and the outermost layer.