All About Glass
All About Glass
This is your resource for exploring various topics in glass: delve deeper with this collection of articles, multimedia, and virtual books all about glass. Content is frequently added to the area, so check back for new items. If you have a topic you'd like to see covered, send us your suggestion. If you have a specific question, Ask a Glass Question at our Rakow Research Library.
When you think of a window, you think of a flat piece of glass. But window glass didn’t always start out flat. It once began as a massive bubble on the end of a glassblower’s pipe. To flatten the bubble, the glassblower could spin it rapidly into a huge disk called a crown. After it was cool, the
One traditional way of making flat glass was to open a bubble of molten glass as if to make a bowl. Using centrifugal force, the glassblower would spin the heated bowl and it would open into a flat disk.