Product Description
Bentonite is a very fine-grained (colloidal) clay of the montmorillonite type containing bases and iron, derived from volcanic ash. The particle size is probably under 0.03% of the average kaolinite grain. It is a very sticky clay with a high shrinkage and a tendency to crack during firing and cooling...but its super-plasticity can help short bodies such as porcelains. It also assists the suspension of a glaze. - p. 20, Illustrated Dictionary of Practical Pottery, 3rd Ed. by Robert Fournier
13-T Features
- Provides high tensile strength
- Combats Friability
- Excellent Dry and Hot Properties
- Increases Durability and Toughness
- Controls Expansion Problems
- Quick Green Compression Strength Development
- High, Quick Dry Compressive Strength
- Intermediate Hot Strength
- Low Viscosity
information courtesy American Colloid Company | |
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Methylene Blue (meq/100g) | >90 |
Soluble Calcium (meq/100g) | <25 |
Green Strength (psi) | 15 @ 7% |
Moisture (%) | <11% |
pH @ 6.25% solids | >8.2 |
Liquid Limit | 600-850 |