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Experimenting with Standard Glazes
A Look at Chemistry
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actual added Albert Museum alumina and silica basic glaze recipe biscuit firing blue bricks brown calcium calcium oxide carbonate ceramics chalk chemical formulae chemistry china clay clay body clay crystals clay surface clear glaze cobalt colour variations coloured glaze colouring agent colouring oxides consider copper dissolve earthenware example experience feldspar fluxing oxides give glaze thickness granite high biscuited immaculate machined important impurities ingredients inside back cover iron oxide kiln lead look lower the melting magnesium matt glazes matt surface melting agent melting point mixture modify molecular formula opacifiers opacity oxygen particles percentages plastic possible potassium powder produce quantities quartz raw materials rock rust rutile sand sieved sodium sodium oxide St Austell stain steatite stoneware firing stoneware glazes studio potter substance test glaze test piece Test tiles texture translucent transparent glaze underglaze usually vary Victoria and Albert visual ware yellow