In shell moulding, how can the shell thickness h accurately maintained

1.	In shell moulding, how can the shell thickness h accurately maintained?
A.	By controlling the time during which the pattern is in contact with mould
B.	By controlling the time during which the pattern is heated.
C.	By maintaining the temperature of the pattern in the range of \[175{}^\circ C-380{}^\circ C\]
D.	By the type of binder used
Answer» D. By the type of binder used

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In shell moulding, how can the shell thickness h accurately maintained?

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