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Decopot NZ Limited

OM-4 Ball Clay

OM-4 Ball Clay

Regular price $24.90 NZD
Regular price Sale price $24.90 NZD
Sale Sold out
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OM #4 Ball Clay

Alternate Names: OM4 Ball Clay, OM4, OM#4, OM 4, Old Mine #4, OM-4 Ball Clay

Description: Tennessee Ball Clay

Oxide Analysis Formula
CaO 0.20% 0.01
K2O 1.10% 0.05
MgO 0.50% 0.05
Na2O 0.20% 0.01
TiO2 2.00% 0.10
Al2O3 26.30% 1.00
SiO2 59.70% 3.85
Fe2O3 1.30% 0.03
LOI 9.30% n/a
Oxide Weight 354.09
Formula Weight 390.40


Old Mine #4, Mayfield, KY.
A fine-grained ball clay with excellent plasticity and strength. Old Mine #4 is an "industry standard" based on its popularity in both casting and plastic formed bodies. It is also widely used as a suspension aid in glazes.

OM#4 ball clay is variable in nature and tends to be more vitreous than some of the more refractory ball clays that are available. It has some soluble salts which can give a brown coloration to the surface, so barium carbonate may be needed to precipitate these.


Goods to be shipped within New Zealand via our carrier PBT


We have a 30-day return policy.

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