Today, I bent glass using fire although the glass is a solid. The tricks to doing this are:
- Let your glass tube set inside a bunsen burner flame for a while.
- Turn your tube around evenly until the glass becomes soft using a metal tong and rubber holder
- Be sure to hold glass with either a rubber holder or a metal tong.
- As it reaches a certain heat, you can slowly bend the glass without breaking it.
Science: The bending of glass is due to glass being very reactant to the temperature. When heated, glass starts to sag into its plastic phase. This is called gravity sag bending. Control is through the pattern of temperature distribution across the sheet.
Photo Credit: Chantel Yip
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