Gypsum-based investment investment composition and gypsum-based investment investment composition production method

摘要

Providing a gypsum-based investing investment composition and a method for manufacturing the gypsum-based investment investing material useful as a rapid-heating type gypsum-based investment material, which enables the provision of a product with a shorter standing time, which could not be realized with conventional products. A gypsum-based powder-like investment material composition for rapid heating type investment material, which is cured after softening by adding a softening solution, and introduced into a high-temperature furnace. At least one co-grinding material selected from co-grinding materials with quartz, co-grinding materials between calcined gypsum and cristobalite, or co-grinding materials between calcined gypsum and quartz and cristobalite, and a liquid or moisture-retaining component having a low water content. Including, investment particle composition for gypsum-based casting having an average particle diameter of 30㎛ or less and a method of manufacturing the same.