During initial cooling, the formation of microcrystalline or macrocrystalline structure in the glaze surface. Source: Clay: A Studio Handbook
Glazing leather-hard or bone-dry wares for single-firing. Source: Clay: A Studio Handbook
Profile of the firing of a kiln, including speed, duration, soaking periods, etc. of both the heating and cooling cycle, as in firing ramp and cooling ramp. Source: Clay: A Studio Handbook
Inspired by traditional Japanese raku firing, Western (typically referred to as American) raku is a relatively low-temperature firing process using clay that is either under fired or otherwise formulated to withstand the thermal shock of being removed from a kiln at top temperature. Work is removed from the kiln at bright red heat and subjected… Read More »
Traditional raku or Japanese raku is a low-fired glazed pottery by a direct process that involved putting the pots into and removing them from a red-hot kiln. The potter Chojiro is credited with being the first to produce raku ware in 1580. The term raku is translated as “enjoyment” or “ease.” From The Potters Dictionary of Materials and Techniques, by Frank and Janet Hamer. See raku (Western).
Machine that forces plastic clay through a die to produce extruded clay shapes. Source: Clay: A Studio Handbook
Chemical phenomenon where two materials in combination melt at lower temperature than either material by itself.
The science of comfortable and effective utility, determining how well a functional object or device works with the human body. Source: Clay: A Studio Handbook
MgSO4—water soluble, rarely used as magnesium source in glazes. Most often used as flocculant for slips and glazes. Often added to porcelain and porcelaineous stoneware bodies (1/2 of 1% of dry materials weight) to counteract deflocculating alkalinity released by kaolins or fluxes. Source: Clay: A Studio Handbook
Al2O3×2SiO2×2H2O—pure white kaolin, less plastic than Tile-6 kaolin, frequently used in glazes. Source: Clay: A Studio Handbook