Sea Shells

CALCIUM

Miscellaneous

Family: Flux Source
Region: None
Mined At: Unspecified
Raw Mineral: No
Generic: No

Notes

Sea shells are made of calcium and thus can be used to make stoneware glazes. A good starting point is 30:30:30 shells:kaolin:flint or 60 Redart:40 calcium carbonate.

It is possible to calcine the shells to 1500F and then slake them in water. However slaking releases considerable heat and the quicklime produced is caustic and fairly soluble, it likely to produce a glaze with high shrinkage and associated crawling problems.

Suppliers

Generic

Authors

Tony Hansen (Owner)

XML

<?xml version="1.0" encoding="UTF-8"?>
<material name="Sea Shells" descrip="CALCIUM" generic="0" rawmineral="0" searchkey="" loi="0.00">
<families>
<family name="Flux Source"/>
</families>
<suppliers>
<supplier name="Generic" country="" url="" label=""/>
</suppliers>
<notes>
<note>Sea shells are made of calcium and thus can be used to make stoneware glazes. A good starting point is 30:30:30 shells:kaolin:flint or 60 Redart:40 calcium carbonate.

It is possible to calcine the shells to 1500F and then slake them in water. However slaking releases considerable heat and the quicklime produced is caustic and fairly soluble, it likely to produce a glaze with high shrinkage and associated crawling problems.
</note>
</notes>
</material>

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