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Bandy Black
Ball Clay
Chemistry
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Links to Other Materials
Miscellaneous
- Family: Ball Clay
- Region: None
- Mined At: Unspecified
- Raw Mineral: No
- Generic: No
Notes
This product was discontinued by H. C. Spinks Clay Company in 2003, it is no longer available. It was used as a coarse ball clay, therefore, contributing to fast slip casting, as well as strength, therefore reducing the tendency to crack after casting or break during handling (usually coarse ball clays are limited in their contribution to strength). It was discontinued because more the industry was interested in blended products that included a larger range of particle sizes. That means a user required only 2 or 3 ball clays for their formulas (instead of 4 or 5) thereby saving space and inventory costs.
Relative Viscosity (1.2 Sp. Gr.):* 1.26
Casting Rate: (gms per 15 min/426 cm2):* 258
Water of Plasticity:* 23.2
% Dry Shrinkage:* 3.2
Dry M.O.R., psi:* 328
Cone 04 8 11
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Fired Shrinkage:* 0.0% 3.6% 6.2%
Absorption:* 21.9% 14.3% 6.9%
M.O.R. psi:* 303 3690 5320
Thermal Expansion, Cone 8: .375% at 700C
P.C.E.: 31
pH: 4.1
Oil Absorption: 32
Bulk Density, lbs per cubic foot: 37-45
Particle Size, Microns: 20 10 5 2 1 0.5 0.2
92% 84% 69% 44% 25% 11% 3%
*Specimens: De-aired, extruded, 50% ball clay, 50% flint
Suppliers
- H. C. Spinks Clay Company Inc.
Authors
- Tony Hansen (Owner)
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