Abstract:
The present invention relates to glaze compositions for treating ceramics, a method of glazing ceramic articles and glazed ceramic, articles obtained by this method, said glaze compositions comprising: Frits from 12 to 48% by weight; Mullites from 5 to 15% by weight; Magnesium Aluminate from 5 to 15% by weight; Zirconium Silico Aluminate from 5 to 15% by weight; Silicas from 5 to 20% by weight, and Feldspars from 5 to 20% by weight, and optionally Inorganic Colorants from 2 to 8% by weight, wherein said Frits consist of Alkalis, Amphoterics and Acids melted together and wherein the Alkalis : Amphoterics : Acids ratio is 1 : 0.383 - 1.596 : 2.605 - 0.603; the Alkalis : Amphoterics : Acids ratio of said glaze compositions is 1 : 0.5223 - 0.5508 : 2.9374 - 2.7339; said Inorganic Colorants, having the purpose of giving the desired colour to the glazes, are chosen from among Zirconium Silicates (for different shades of white glazes), Iron Chrome Cobalt Spinels (grey scale and blacks), Zirconium Silica Praseodymium (yellow scale), Zirconium Silica Iron (pink scale), Zirconium Silica Vanadium (blue scale), Iron Chrome Manganese Spinels (brown scale) and their mixtures (full colour range); these glaze compositions being designed to grant to the glazed ceramic articles elevated anti-scratch, anti-stain, anti-abrasion and anti-slip properties.