Just saw This Old House with a factory tour of glass-making. The process of making float glass has always intrigued me because I can't figure out how floating molten glass on a bath of molten metal can result in such a perfectly flat surface. Aren't there ripples to worry about? And how is this better than a solid polished surface to receive the molten glass? Is there further cold polishing required to get the final surface?
19 years ago