Blue glass dish
1970
Two dishes in blue (Co-Cu) glass, c. 1970
Dish in blue (Co-Cu) glass, c. 1970. Coloured glass has been in existence since the very early days of glassmaking.The Romans and Egyptians showed great skill in their use of metallic oxides to colour glass. It was the Bristol Glassmakers who first added cobalt oxide to lead glass to produce a vibrant blue glass which is famous today as "Bristol Blue Glass".