RECONDITIONING GLASS-FORMING MOLDS
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United States of America Patent
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May 23, 2013
app pub date -
Nov 1, 2012
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Nov 23, 2011
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Abstract
Glass-forming molds comprising titanium aluminum nitride glass release coatings are reconditioned with aqueous mineral acid solutions comprising fluoride and phosphate ions to provide molds with restored glass release characteristics without recoating, permitting the molding of glass articles from aggressive ion-exchange-strengthenable high-alkali aluminosilicate glasses at high temperatures over extended mold service intervals.
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