| 摘要 |
PROBLEM TO BE SOLVED: To suppress unjust yellowing of a glass plate manufactured by a float method, which is caused by silver electrode formation by properly controlling the temperature of high viscus molten glass supplied into a float bath. SOLUTION: When the molten glass 2 having such a characteristic that a temperature equivalent to 10<SP>3</SP>dPa s viscosity is ≥1255°C is supplied to the float bath 5 in a molten glass supply step for supplying the molten glass melted in a melting furnace to the float bath, The surface temperature of the molten glass when the molten glass is passed through a lip 7 of the inlet of the float bath 5 is controlled to be ≤1250°C and in some case, nitrogen 8 is supplied to the molten glass 2 when the molten glass is passed through the lip 7 of the float bath 5 inlet. COPYRIGHT: (C)2008,JPO&INPIT
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