Which precision casting shell is more accurate

In the investment casting process, there are 4 methods of shell making. They are sodium silicate shell, composite shell, silica sol shell (low temperature wax), silica sol shell (medium temperature wax). So, which one has higher precision than silica sol casting? To learn more, click the link below.

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Which Investment Casting Shell Making Accuracy is Higher? water glass shell making, Composite shell making, Silica Sol Shell Making