Float glass is a sheet of glass made by floating molten glass on a bed of molten metal,
typically tin, although lead and various low melting point alloys were used in the past. This
method gives the sheet uniform thickness and very flat surfaces. Modern windows are made from
float glass. Most float glass is soda-lime glass, but relatively minor quantities of specialty
borosilicate[5] and flat panel display glass are also produced using the float glass process.[6]
The float glass process is also known as the Pilkington process, named after the British glass
manufacturer Pilkington, which pioneered the technique (invented by Sir Alastair Pilkington) in
the 1950s.
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