| 摘要 |
The present invention relates to a method for manufacturing float of a float glass plate and a float glass plate, which comprises: consecutively supplying molten glass to the top of a molten metal (13); forming a glass ribbon (14) with a fixed width by drawing in a drawing direction (8), facing a tin side surface (15) to the molten metal (13); facing an upper side surface (16) by falling from the molten metal (13), cooling a glass ribbon (14) along a drawing section (9), lifting from the molten metal (13), and additionally moving to an annealing lehr (12). An atmosphere of a portion has a concentration of SO_2 on the top of the upper side surface (16) greater than the top of the tin side surface (15) of the glass ribbon (14), by supplying an O_2 containing atmosphere (31) to the portion a of the drawing section (9) of the molten metal showed in the drawing direction (8), and supplying SO_2 containing air current (32) from at least a first position (s1) and desirably from an additional position (sn). |
