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Goldart

Alternate Names: Cedar Heights Goldart

Oxide Analysis Formula
CaO 0.20% 0.01
K2O 1.90% 0.07
MgO 0.40% 0.04
Na2O 0.20% 0.01
TiO2 1.80% 0.08
Al2O3 28.80% 1.00
SiO2 55.20% 3.25
Fe2O3 1.40% 0.03
LOI10.00%
Oxide Weight 318.40
Formula Weight 353.77

Notes

Cedar Heights Goldart is a selectively mined (in southern Ohio), plastic stoneware clay that is airfloated to 200 mesh particle size. It offers excellent working properties and has a wide firing range. It is balanced enough to be used alone. It vitrifies to a light buff at cone 10R (the maximum range is not much beyond that).

Goldart has been used for many years in the pottery and ceramic industries as a body ingredient. It appears in many clay body recipes found in textbooks and magazines.

Cedar Heights Bonding is a 50 mesh version of Goldart.

Physical Properties: Cone 06 1 6 8 10
===================================
Dry Shrinkage 8.5 8.5 8.6 8.5 8.8
Fired Shrinage 1.1 4.5 6.2 7.0 7.9
Absorption 14.0 8.5 6.4 4.3 1.4
Color White Cream Light Tan Mottled
Tan Grey
Contains some sulfur.
Can be used as a substitute for Jordan fireclay.

Related Information

What does Goldart look like if you fire it by itself?

Goldart (left) compared to Plainsman Midstone (right). Goldart is a buff and vitreous stoneware at cone 10R. These are fired at cone 7, 8, 10 oxidation and 10 reduction (bottom to top). Soluble salts in the Goldart impart a darker coloration to the reduction fired bar). The Midstone has some coarser particles that make larger speckles in reduction.

Links

Materials Redart
Materials Salt Lick
Materials Fireclay A/S
Materials Industrial Fireclay
Materials CKR Clay
Materials Bonding Clay
Materials Ceramic Fireclay
Materials Roseville Clay
Typecodes Clay Other
Clays that are not kaolins, ball clays or bentonites. For example, stoneware clays are mixtures of all of the above plus quartz, feldspar, mica and other minerals. There are also many clays that have high plasticity like bentonite but are much different mineralogically.
Suppliers RESCO Products
Suppliers Cedar Heights
Hazards Quartz Toxicity

Data

Pyrometric Cone Equivalent29-31

By Tony Hansen


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