Ppg Industries Ohio, Inc.

Other

Charlene S Smith

George A Pecoraro

A float glass chamber and related methods include a hot section having an atmosphere in at least the lower plenum with less than 3 percent hydrogen based on volume and a cold section having a different volume percent hydrogen.

Apparatus and methods for producing float glass having reduced defect density

A method for reducing the defect density of glass comprising melting a glass composition comprising from 65-75 wt. % of SiO; from 10-20 wt. % of NaO; from 5-15 wt. % of CaO; from 0-5 wt. % of MgO; from 0-5 wt. % of AlO; from 0-5 wt. % of KO; from 0-2 wt. % FeO; and from 0-2% FeO, wherein the glass composition has a total field strength index of greater than or equal to 1.23 is disclosed.

Method for making float glass having reduced defect density

A method for reducing the defect density of glass comprising melting a glass composition comprising from 65&#x2013;75 wt. % of SiO; from 10&#x2013;20 wt. % of NaO; from 5&#x2013;15 wt. % of CaO; from 0&#x2013;5 wt. % of MgO; from 0&#x2013;5 wt. % of AlO; from 0&#x2013;5 wt. % of KO; from 0&#x2013;2 wt. % FeO; and from 0&#x2013;2 % FeO, wherein the glass composition has a total field strength index of greater than or equal to 1.23 is disclosed.

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Lower Burrell, PA, United States of America

Charlene S Smith