Features: 1 The casting mold can bear temperature of 720oC(1328oF)~750oC(1382oF), and has high thermal shock resistance. Casting mold can endure quick and direct temperature rising, while the mold cavity will not be fractured. 2 Mold cavity duplicates are very clear, no any male-female face on casting surface. Castings have very smooth feel, gold consumption of finishing is very low. 3 Use 3% boric acid to prepare investment, can be directly used in stone (diamond) in place wax setting. 4 This investment powder is applicable in solid gold, karat gold, silver and brass alloy high-grade jewelry casting, and is the investment in common use. 5 Automatically collapsed when dip into water, easy to pattern drawing.