This bag of casters blend investment is what you need to do vacuum and centrifugal casting.  The investment, available in a 10.5 or 44 pound bag, is perfect for brass, bronze, silver and gold casting, and is formulated to create precise pattern duplications.   You’ll get repeatable results because of the extended work time up to 13 minutes, combined with a wider range of water to powder ratios.  This investment is formulated for easy breakout during quenching.  Order today at Stuller.com/tools.