PROBLEM TO BE SOLVED: To provide a coating agent composition for a lost foam to prevent a burned defect and transfer of a drooped line, and a method of casting the lost foam.;SOLUTION: The coating agent composition for the lost foam contains a fire-resistant particle. In ash of the coating agent composition for the lost foam, content of SiO2 is 83.0-90.0 wt.%, content of Al2O3 is 6.2-9.8 wt.%, and total content of Na2O and K2O is 2.2-4.0 wt.%.;COPYRIGHT: (C)2010,JPO&INPIT
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