A colorant which can be used in amounts to 15% to achieve or modify yellows, reds, and oranges. Although this form of uranium is said to be less radioactive, the use of any form of uranium is considered dangerous by most authorities.
|Yellow is the usual oxidation color for uranium modified glazes. The presence of CaO and ZnO are beneficial.
|It is possible to achieve reds in lead silicate glazes low in alumina and having no boric oxide. Zinc is also helpful to develop the color.
|By Tony Hansen
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