The Constitution of Coloured Glasses. (+Discussion)

JSGT 1947 V31 T105-T113

Colouring agents in glass are classified on the basis of the analogy between glasses and solutions. It is suggested that the colours of sulphur-amber glasses are produced by the existence in the actual glass structure of molecular groupings of the type –S–S–Fe. Fluoride opals and glasses coloured by cadmium sulphide are considered as examples of solid-phase colourings, containing a certain amount of dissolved fluoride or sulphide as part of the structural network. Those theoretical considerations have enabled the control of amber glasses on a production scale to be maintained.

H. Cole