MOLD AND CORE MAKING
wall movement and the permeability in mold and core sand and hence makes the mold and core surface clean and smooth. 12.3.4.5 Pitch It is distilled form of soft coal. It can be added from 0.02 % to 2% in mold and core sand. It enhances hot strengths, surface finish on mold surfaces and behaves exactly in a manner
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