Amethyst glass vase by James Powell and Sons (Whitefriars) Limited

Made:
1935 in Wealdstone
maker:
James Powell and Sons (Whitefriars) Limited

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Science Museum Group Collection
© The Board of Trustees of the Science Museum, London

Science Museum Group Collection
© The Board of Trustees of the Science Museum, London

Amethyst glass vase, colour obtained using manganese, by James Powell and Sons (Whitefriars) Limited, Wealdstone, Harrow, Greater London, England, 1935

Glass is coloured by the presence of metallic oxides, either as impurities in the raw materials or as deliberate additions. Generally red colours are more difficult to produce. Blue is made with cobalt or copper and green is produced by the addition of iron or chromium. Uranium oxide or silver gives yellow, and orange, which is difficult to produce, is made by adding selenium. Pale pink and shades of violet and purple are made with manganese and red with copper, gold and cadmium selenide or zinc sulphide. Black results if any colouring agent is used to excess.

Details

Category:
Glass Technology
Object Number:
1935-158
Materials:
glass and manganese
Measurements:
estimated through glass: 350 mm 120 mm,
type:
vase
credit:
On loan from G H Zeal Limited