Ceramic Glossary Database

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Words beginning with U

• Underglaze

  Oxide color mixtures which are applied to bisque or green ware and over which a transparent glaze is applied. To prevent excessive feathering of edges, underglazes are usually a mix of metallic oxides and a fritted stable glaze.

• Unity formula

  A unity formula is just a formula that has been retotalled so that the RO group of oxides total one (unity). This is also called a Seger formula and this standard provides the basis for comparing glazes.

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