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Whiting - 1 lb.
 
CaCO3 (56.10% CaO) Whiting has traditionally been a source of CaO in raw glazes. Also whiting produces a very large volume of gases while decomposing, it loses more than 40% by weight. While these gases should be gone well before 1100C (and therefore should not disturb the glaze melt), in low or fast fire they can contribute to imperfections and faults in the glaze surface. In low-fire bodies, calcium carbonate is sometimes added in small amounts as a filler to reduce fired shrinkage and act as a whitener. It is also common to see 5% whiting included in porous earthenware body recipes to prevent moisture expansion (which causes glazes to craze). High calcium coupled with lower alumina will favour the formation of calcium silicate crystals during cooling. This mechanism promotes opacity. Source: Digital Fire.
 
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Price: $1.50
Quantity Pricing
Quantity
Price
1-4
$1.50
5-9
$0.47
10-49
$0.35
50-99
$0.25
100-499
$0.21
500+
$0.20

 
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