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Bubbling molten glass

Bubbling

Bubbling with various gases during melting and refining can improve homogeneity and quality

During melting and refining, you can bubble molten glass by injecting various industrial gases, including oxygen and helium, to help enhance glass melting convection currents and also to improve re-adsorption of any remaining bubbles into the melt in order to eliminate defects.
Glass bubbles

During Melting and Refining Bubbling with Various Industrial Gases Can Help to

  • Improve conditioning by enhancing convection currents for better temperature and composition homogeneity
  • Improve fining, or re-adsorption, of any remaining bubbles into the melt to reduce defects

Oxygen

Oxygen is more soluble, and compatible with most glass compositions, than air

Helium

Helium has fastest bubble rise of any gas

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