PURPOSE: To form a uniform spot pattern layer by arranging a plate body so as to cover a base layer and sliding a measure body on the surface of this plate body while the measure body is not directly slid on the already formed base layer.
CONSTITUTION: A powdery raw material is filled into the molded recess 26 of a tile 10 and thereby a base layer 14 is formed. Thereafter a plate body having many through-holes 36 provided at uniform density is arranged so as to cover the whole surface of the base layer 14. A measure body 34 holds the spot material consisting of great granular powder for forming a spot to the inside thereof and has a downward opening. This measure body 34 is slid on the upper face of the plate body and thereby the spot material is allowed to fall on the surface of the base layer 14 through the downward opening and the through-holes 36 of the plate body. A layer 22 is laminated which has pre scribed thickness and is made of the spot material. This laminated body 22 is compressed and molded and thereafter roasted. Thereby the spot layer 22 is uniformly formed at uniform thickness and also such a problem is avoided that the small particles forming the base layer 4 are floated out on the spot layer 22.
NISHINO IWAO
HISADA KATSURO
YAMAGUCHI TAKASHI
