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Important Note

The Corning Museum of Glass is temporarily closed as we do our part to limit the spread of COVID-19. All previously scheduled classes, events, and programs are cancelled until further notice.

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.

Practical Applications of Tension in Glass

"Annealed glass," "safety glass," "tempered glass"... Confused? Learn the differences through these Glass Breaking Demos.

Solder vs. Glass Rod

See what really sets glass apart from metal and then begin to understand why humans have invented such odd ways of shaping it while hot: core-forming, fusing, slumping, and—oddest of all—glassblowing.

Annealing and Tension in Glass

Hot-working processes used to form a glass object—glassblowing for example—must be followed by a very gradual cooling period called annealing. See what happens when an object is not properly annealed and learn why it breaks.

What is Glass?

Glass is a rigid material formed by heating a mixture of dry materials to a viscous state, then cooling the ingredients fast enough to prevent a regular crystalline structure. As the glass cools, the atoms become locked in a disordered state like a liquid before they can form into the perfect %

Raw Materials of Glass

See and understand the magical process of making glass from simple materials, by using great heat. Until the most recent times, glassmaking was a closely guarded secret passed on within workshops or even families from one generation to the next, often over hundreds of years.

Prince Rupert's Drop

Don't try this at home! A classic demonstration involving exploding glass: it spectacularly shows both the great strength and vulnerability of glass that has been rapidly cooled from the molten state.

Coloring Glass

Learn about how glass is colored with Corning Museum of Glass experts. Colored glass is made by adding small amounts of metal oxides to the batch.