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glaze-resist

Posted On December 11, 2008 0 Comments
  Decorating technique where resist materials are applied to prevent glaze from adhering to certain areas. Source: Clay: A Studio Handbook

glaze-melt

Posted On December 11, 2008 0 Comments
  The chemically active state of the melted glaze. Source: Clay: A Studio Handbook

glaze-fit

Posted On December 11, 2008 0 Comments
  The matching of glaze to claybody in terms of composition and coefficient of expansion so that it will adhere permanently . See glaze compression, interface.  Source: Clay: A Studio Handbook

glaze-firing

Posted On December 11, 2008 0 Comments
  Kiln firing in which glazes are melted to form a smooth glassy surface. Source: Clay: A Studio Handbook

glaze compression

Posted On December 11, 2008 0 Comments
  In high-fired wares, ideal state when claybody shrinks slightly more than glaze, putting glaze under slight compression, giving greater strength, resiliency. See crazing and shivering. Source: Clay: A Studio Handbook

glaze, glazes, reduction-fired glazes, celadon, temmoku, chun, crystalline glazes, macrocrystalline glazes

Posted On December 11, 2008 0 Comments
  Coating of powdered ceramic materials, usually prepared and applied in water suspension, which melts smooth and bonds to clay surface in glaze firing. See interface.  Source: Clay: A Studio Handbook

glassy-phase

Posted On December 11, 2008 0 Comments
  In heating ceramic materials, point where glass-formers and fluxes combine and soften to begin forming a glass. See sintering, dissolution.  Source: Clay: A Studio Handbook

glass-former

Posted On December 11, 2008 0 Comments
  The primary material that, in combination with fluxes, forms the glass essential to all fired ceramics. Primary glass-former at all temperatures is silica. Source: Clay: A Studio Handbook

glass

Posted On December 11, 2008 0 Comments
  Super-cooled liquid, which softens and hardens over broad range of temperature and cools to form an amorphous, noncrystalline solid. Level and rate of hardness (viscosity) controlled by temperature and by addition of fluxes and refractories, making possible the wide temperature range of ceramic clays/glazes. Source: Clay: A Studio Handbook

Gerstley borate; colemanite; calcium borate

Posted On December 11, 2008 0 Comments
  CaO×3B2O3—traditional important LT alkaline flux, but is no longer being mined. Replace with Ferro 3134 for LT glazes, commercial Gerstley borate substitutes for HT glazes. Test all substitutes. Source: Clay: A Studio Handbook