|Monthly Tech-Tip |
Alternate Names: Dolowhite Select 200
Description: White burning Dolomite, CaMg(CO3)2
Full name is Dolowhite Select 200, it is considered a high purity dolomite and is popular in North America. It is 54.9% calcium carbonate and 42.4 magnesium carbonate.
It is available in many sizes from 20-400 mesh. The 200 grade typically has 0.1% retained on 100 mesh, 1% on 140 mesh and 7% on 200 mesh.
The manufacturer is Lhoist (pronounced Lwost), they are a limestone producer based in Belgium. This product is produced in Salinas, CA.
An inexpensive source of MgO and CaO for ceramic glazes, also a highly refractory material when fired in the absence of reactant fluxes.
Camadil 95 Dolomite
Materials that source Na2O, K2O, Li2O, CaO, MgO and other fluxes but are not feldspars or frits. Remember that materials can be flux sources but also perform many other roles. For example, talc is a flux in high temperature glazes, but a matting agent in low temperatures ones. It can also be a flux, a filler and an expansion increaser in bodies.
|By Tony Hansen|
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