A procedure for the preparation of a refractory coating for precision foundry, according to the technique of the lost wax (Machine-translation by Google Translate, not legally binding)

摘要

By a process of preparing a refractory lining for precision casting consisting of an intimately homogeneous mixture composed of approximately 70 parts of commercial cristobalite and approximately 30 parts of calcium sulphate hemihydrate of low normal consistency (Machine-translation by Google Translate, not legally binding)