The fine investment powder is applicable in (1)solid gold,karat gold,silver (2)brass alloy high-grade jewelry casting. Features:1 ... -female face on casting surface. Castings have very smooth feel, gold consumption of finishing is very low.3 Use 3% boric ... wax setting.4 This investment powder is applicable in solid gold, karat gold, silver and brass alloy high-grade jewelry casting, and is ...