Patent ID: 8127572
Filing Date: 2012-03-06
Classification: C03B,C03C

Abstract:
1. A method of making a glass article comprising: melting a batch material comprising at least one multivalent oxide compound to form a glass melt having a total concentration of reduced multivalent oxide compound(s) and a water content; flowing the glass melt through a vessel comprising a platinum group metal, an atmosphere in contact with an outside surface of the vessel comprising a partial pressure of hydrogen pH forming a glass article from the glass melt, the glass article comprising a concentration of a reduced multivalent oxide compound, a water content expressed as β calculating a blister index (I where pH repeating the melting, the flowing, the forming, and the calculating steps over a range of one or more process variables selected from the group consisting of the water content of the glass melt, the partial pressure of hydrogen in the atmosphere in contact with an outside surface of the vessel, and the total concentration of reduced multivalent oxide compounds in the glass melt; determining a relationship between the number of blisters per pound of glass and the blister index (I maintaining the blister index (I