Bentonite Volclay HPM-20

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Quick Overview

Betonite is typically used as either a suspension agent in glazes and plasticizer in clay bodies. HPM-20 is a highly refined white burning bentonite.

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Details

Bentonite is a clay-like material derived of montmorlinite. Betonite is typically used as either a suspension agent in glazes and plasticizer in clay bodies. A noticable difference in plasticity can be seen with additions as low as 1% and is typically used up to 5% in recipes. Bentonite HPM-20 differs from standard bentonite in that it is a highly refined material which eliminates iron spotting which can occur. Works well for porcelains and clear or white glazes where these qualities are desired. 

Digitalfire.com 

Oxide Analysis Formula
CaO 1.00% 0.14
MgO 2.00% 0.39
K2O 1.00% 0.08
Na2O 3.00% 0.38
Al2O3 20.00% 1.55
SiO2 59.00% 7.76
Fe2O3 3.50% 0.17
LOI 10.00

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