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Kamogawa Stone

Oxide Analysis Formula
CaO 5.98% 0.43
K2O 1.19% 0.05
MgO 3.01% 0.30
Na2O 3.41% 0.22
TiO2 2.24% 0.11
Al2O3 13.94% 0.55
SiO2 54.79% 3.66
Fe2O3 13.24% 0.33
LOI2.19%
Oxide Weight 392.90
Formula Weight 401.70

Notes

We do not know much about this material, and have lost track of where this analysis is from. However, if this chemistry is correct, this is clearly a well fluxed material that would melt well. It also has an exceptionally high iron content not to mention alot of TiO2.

A potter from Japan told us that the glaze on black Raku tea bowls was made from Kamogawa stone and that they included lead.

By Tony Hansen


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