配方类型:

METALS AND THEIR TREATMENT

配方说明:

Foundry Sand Additive (U.S. Patent 2,848,338)

配方组成:

Powdered Charcoal (80-200 Mesh)/70-75
Fuel Oil (Fl. Pt. 120-180'F.)/25-30

配制方法:

0.5-1.5% of above is added to coat particles of foundry core sand.