The M-33 ball clay is a carbonaceous selection that bears similarity to some clays found in the Southwestern section of England. It has a uniquely waxy type of plasticity and provides high green and dry strength to a variety of white ware ceramic formulations. especially sanitary ware. The organic content is largely of colloidal size, which offers the added advantage of rheology stability and ease of casting slip deflocculation. Due to this rich source of collidal organic content, our M-33 should be considered as an additive type clay in percentages of 50% or less of the total ball clay content of white ware formula.

Crude Color Dark Brown
Dry Modulus of Rupture (psi)* 700
Wet Sieve Residue, +200 mesh (%) 1.95
Water of Plasticity (%) 38
Linear Drying Shrinkage (%) 9.0
Soluble Sulfates (ppm) 230
Filtration (ml) 14
Specific Surface Area (m2/g) 23.3
CEC/MBI (meq/100 ml) 11.6
pH 6.3
Particle Size (% less than)
5 Micron
1 Micron
.5 Micron
Median Particle Diameter (Micron) 0.67

*50% clay/50% flint, cast bars

Silicon Dioxide (SiO2) 52.80
Aluminum Oxide (Al2O3) 25.10
Iron (Ferric) Oxide (Fe2O3) 1.71
Titanium Dioxide (TiO2) 1.62
Calcium Oxide (CaO) 0.29
Magnesium Oxide (MgO) 0.59
Sodium Oxide (Na2O) 0.61
Potassium Oxide (K2O) .82
Loss on Ignition 17.0


FIRED PROPERTIES Cone 04 Cone 3 Cone 11
Linear Fired Shrinkage (%) 5.2 8.5 11.6
Absorption (%) 13.5 6.2 1.0


NOTICE: All data given and statements and recommendations made herein are based upon our research and are believed to be accurate typical data. However, no guarantee of their accuracy is made or implied. Our products are sold on the condition that the user will evaluate them himself, as well as our formulas and recommendations, to determine their suitability for his own purposes before adoption on a commercial scale. Also, statements as to the use of our products are not to be construed for their use in the infringement of any patent.

Warning: This clay product contains quartz which may cause delayed respiratory disease (silicosis) if inhaled over a prolonged period of time. Avoid breathing dust. Use NIOSH/MSHA approved respirators where TLV for crystalline quartz is exceeded. IARC Monograph Volume 68, 1997 concludes that the respirable fraction of crystalline quartz, causes cancer in humans. Refer to MSDS for complete details.