Investments for dental casting
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United States of America Patent
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Aug 5, 1986
Grant Date -
N/A
app pub date -
Jun 10, 1985
filing date -
Jul 6, 1984
priority date (Note) -
Expired
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Abstract
An investment material for dental casting comprises 100 parts by weight of a mixture of hemihydrate gypsum, quartz and/or cristobalite and 2 to 5 parts by weight of natural starch optionally with 0.1 to 1.0 part by weight of soluble starch.
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