Patent ID: 6514622
Filing Date: 2003-02-04
Classification: C04B

Abstract:
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 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 &mgr;m 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 &mgr;m 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 electronegativity based on Pouling's rule of not more than 1 in the glaze layer as the outermost layer is less than 20% 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.