配方类型:

METALS AND THEIR TREATMENT

配方说明:

Porous Gypsum Mold (Japanese Patent 706 (1956))

配方组成:

Borax/-
Aluminum Powder/-
Calcined Gypsum/70.0
Water/-
Calcium Carbide/1.4
Caustic Soda/-
Quartzite (100 mesh)/28.3
Talc Powdered/0.1

配制方法:

Mold without removing hydrogen; heat at 80 to 100'C. for one hour and at 220'C. for one hour.