14 interesting facts about glass

  1. When glass breaks, the cracks move at speeds of up to 3,000 miles per hour.
  2. Glass takes over 1 million years to decompose in our landfills and dumps.glass brick
  3. Age man used obsidian (a naturally formed glass) for cutting tools and weapons.
  4. A glass is an amorphous (non-crystalline) solid material. Glasses are typically brittle, and often optically transparent.
  5. Recycling glass reduces air pollution by 20%, and water pollution by 50%.
  6. Hydrofluoric acid will dissolve glass.
  7. In 1500 bc, we believe the first glass bottles were made using the “Core-Forming Method”.
  8. Only 27% of the glass used in the United States is recycled. A typical glass recycling factory can recycle up to 20 tons of glass per hour.
  9. The energy saved from recycling 1 glass bottle can run a 100-watt bulb for 4 hours.
  10. Glass manufacture had developed in Venice by the time of the Crusades (A.D. 1096-1270), and by the 1290’s an elaborate guild system of glass workers had been set up.
  11. Thin-glass goblets can vibrate when hit by sound waves. This is due to resonance.
  12. Glass is commonly used for windows, bottles, modern hard drives and eyewear, and examples of glassy materials include soda-lime glass, borosilicate glass, acrylic glass, sugar glass, Muscovy-glass, and aluminium oxynitride.
  13. The largest glass furnaces produce more than 400 tonnes - more than 1 million bottles each day!
  14. The term glass developed in the late Roman Empire. It was in the Roman glassmaking center at Trier, now in modern Germany, that the late-Latin term glesum originated, probably from a Germanic word for a transparent, lustrous substance.