The MOST effective manner to produce a hard surface on a cast is by:
A. Employ as much water as possible on mixing
B. Employ as little water as possible on mixing
C. Adding 2% of borax to the mix
D. Adding calcium tetraborate
E. None of the above
A. Employ as much water as possible on mixing
B. Employ as little water as possible on mixing
C. Adding 2% of borax to the mix
D. Adding calcium tetraborate
E. None of the above