The Science Of Glass

iTunes
27th May 2015

Here’s a great podcast for you my fellow glass painters. But art is not the subject here. Nor is it craft. No, this time it’s science.

The episode begins with a brief discussion of the history of glass e.g.

  • The Ancient Egyptians who originally made beads and jewellery
  • The Romans who introduced glass works across their Empire
  • The Venetians who discovered (amongst many other facts) that adding manganese oxide made glass clearer.

And then the main focus becomes both fascinating and more technical e.g.

  • Glass is a “disordered” substance with an often ill-defined transition from liquid to solid
  • Transparency results from disorder i.e. disorder is necessary for transparency
  • Colour results from (technical) “impurities”.
Myself, I took comfort from the observation that annealing is a strange phenomenon – even to scientists … You take this material (glass), and hold it at a certain temperature, and, just by holding it, you change some of its fundamental properties.

The discussion jumps around a lot. But stick with it and you’re bound to hear some fascinating scientific facts about this gorgeous material on which we paint.