PURPOSE: To diversely vary the color tone of a molded and fired body by blending noble metal powder with specified amts. of a cellulosic water-soluble binder, a surfactant, oil and water and regulating the particle diameter of the noble metal powder.
CONSTITUTION: This plastic compsn. for molding a noble metal consists of, by weight, 50-90% noble metal powder, 0.8-8% cellulosic water-soluble binder, 0.03-3% surfactant, 0.1-3% oil and the balance water with inevitable impurities. The noble metal powder is a mixture of powders different from each other in average particle diameters within the range of 1-200μm and the particle diameter ranges of the powders do not overlap each other. The color tone of the noble metal powder varies diversely in accordance with a variation in the average particle diameter.
HIRASAWA JUICHI
ISHII TOSHINORI
