| 摘要 |
PURPOSE: A method for manufacturing dental hard gypsum is provided to ensure excellent workability and to improve surface strength. CONSTITUTION: A method for manufacturing dental hard gypsum comprises: a step of pulverizing 100 weight parts of natural gypsum; a step of pressing the natural gypsum; a step of adding anti-swelling agent to form a gypsum mixture; a step of plasticizing the gypsum mixture; a step of grinding in fine powder; a step of pulverizing gypsum mixture; and a step of mixing the gypsum mixture with synthetic resin.
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