Colored crystallized glass article and method for producing the same
AssigneeNippon Electric Glass Co., Ltd.
InventorsTakehiro Shibuya, Takashi Sakane, Yoshio Hashibe
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Abstract
A crystallized glass article having a surface pattern like granite, marble or other natural stones with a line pattern of a desired color or colors, which is formed by fusion bonding small masses of a crystallizable glass material mixed with inorganic pigment powder at a heat-treating temperature higher than the softening point. The surface pattern comprises crystallized glass areas defined by the small masses in the surface layer of the article and the colored line pattern defined by the pigment dispersed in the interfaces between adjacent ones of the small masses in the surface layer.
Claims6
A method for producing a crystallized glass article having a colored surface pattern which comprises the steps of:
- preparing small masses of glass which essentially consists of SiO.sub.2 -Al.sub.2 O.sub.3 -CaO-ZnO glass to precipitate .beta.-wollastonite crystals in the shape of a needle therein with softening and deformation by heat-treating at a heat treating temperature higher than the softening point of the glass;
- preparing a mixture of said small masses and coloring agent powders by mixing together with water;
- heat-treating said mixture in a mold at said heat treating temperature until said .beta.-wollastonite crystals are present in each of said small masses to thereby make said small masses into crystallized small masses and said crystallized small masses are fusion-bonded along interfaces there-between to form an integral body, said coloring agent powders maintaining dispersed in the interfaces whereby said colored surface pattern is present defined by the crystallized small masses forming the surface layer and a color of the coloring agent.
Dependencies are inferred from the claim text.