PURPOSE: To easily obtain a patterned crystallized glass building material, by using matrix powder containing colorless glass powder and colored glass powder having specific particle size in combination with different glass powder, arranging the powders in a mold in a manner to form a pattern, pressing the powder in the mold and crystallizing the produce by heat-treatment.
CONSTITUTION: (A) Matrix glass powder obtained by mixing (i) colorless glass powder containing powder of finer than 200 mesh accounting for ≥70wt% with (ii) colored glass powder containing powder of finer than 200 mesh accounting for ≥70wt% and optionally containing powder of 20W70 mesh and (B) different kind of glass powder wherein the content of the colored glass powder of 20W70 mesh is different from the content in the matrix powder are prepared beforehand. The matrix glass powder 2 and the different glass powder 3 are arranged and filled in a forming mold 1 in a manner to form a pattern in the mold 1. The powders are pressed in the mold and crystallized by heat-treatment to obtain the objective patterned crystallized glass building material.
SETO YOSHITO
OKABAYASHI AKITOSHI
KIMURA HIROYUKI
SHIKATA TAKASHI
