Television face plates resistant to browning
AssigneePilkington Brothers Limited
InventorsAlan H. Gerrard, George W. F. Pardoe
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Abstract
A television face plate resistant to browning is formed by melting and refining molten glass which contains cerium oxide as an anti-browning agent, the process being carried out in the presence of a sulphur containing compound such that the cerium oxide is converted substantially into the cerous state during melting and refining thereby increasing resistance to browning.
Claims6
A process for the production of a television face plate resistant to browning, which process comprises melting and refining molten glass which comprises cerium oxide as an anti-browning agent and a refining agent comprising a sulphur containing compound, wherein said refining agent is substantially free from an arsenic or antimony oxide containing compound, the cerium oxide being converted substantially into the cerous state during melting and refining thereby increasing the resistance of the face plate in use to browning, and subsequently forming the molten glass into a face plate.
Dependencies are inferred from the claim text.