how is glass made?

[leanneroby]

How do you make glass? as n flat glass made in windows and who discovered it?

[Fern57]

It's ancient actually, which surprised me. See these sites here:
http://www.urbansky.com/glassmaking.htm

http://www.texasglass.com/glass_facts/How_Glass_made.htm

[Chillum]

As an aside to the original question..is glass really a very viscous liquid or is this a myth?

[brachiopod]

The 'flat glass' used for windows is known as 'float glass'.

Put simply, the molten glass is poured onto a layer of molten metal in a continuous running process. Being less dense, the liquid glass floats on top of the liquid metal (think of a thin layer of oil on water) When cooled, this produces an even, flat glass suitable for window panes.

Without actually looking it up, I forget which molten metal (or more likely alloy) that they use, or who invented the process, though I suspect it's a well known name like Pilkington or something.

[brachiopod]

Chillum, see;

http://math.ucr.edu/home/baez/physics/General/Glass/glass.html

and at least read the conclusion.  ;o)