Question time . . . . PbO

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Unit 6 Topic 8
Oxide Qualities
Why is lead oxide not suitable for use in high temperature glazes?
Because the lead is very volatile over 1100 deg.C

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Lead fluxed glazes are too soft and easily scratched for stoneware.
Lead oxide is too toxic for high temperature glazes.
The firing range of lead oxide has a bad effect on colour.
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