Ball Clay CA1 / CA2 (Claypro, Axedale)
A standard material in Glazecalc's library: its oxide analysis, unity contribution and hazards.
What it is
- Kind
- Clays
- Formula
- SiO₂ 59%, Al₂O₃ 25.4%, Fe₂O₃ 1.09%, TiO₂ 1.4%, CaO 0.01%, MgO 0.85%, K₂O 3%, Na₂O 0.23%, LOI 8.4%
- Also called
- Ball Clay CA1, Ball Clay CA-1, Ball Clay CA2, Ball Clay FX, Axedale ball clay, Walker BA200
- Made by
- Claypro Aust Pty Ltd, Junortoun (Bendigo); mined at Axedale, Victoria, Australia
- Sold in
- AU
- Similar materials
- OM-4 Ball Clay , Hyplas 71 Ball Clay , Hymod AT Ball Clay
- Source
- Claypro Aust Pty Ltd, CA 1 Typical Analysis XRF
Dry-milled, very plastic secondary clay from Claypro's own pit at Axedale, Victoria; the Australian ball clay sold to potters as CA1 (Northcote) and CA2 (Walker, Blackwattle). Used for plasticity in bodies and for suspension, silica and alumina in glazes.
Oxide analysis and unity formula
Glazecalc has the analysis of Ball Clay CA1 / CA2 (Claypro, Axedale) as weight percent of the raw material. The unity contribution is the moles of each oxide in the amount of Ball Clay CA1 / CA2 (Claypro, Axedale) that holds 1.0 mole of flux, which is how Glazecalc adds it into a recipe's unity formula.
| Oxide | Weight % | Unity contribution |
|---|---|---|
| SiO₂ | 59 | 17.280 |
| Al₂O₃ | 25.4 | 4.384 |
| Fe₂O₃ | 1.09 | 0.120 |
| TiO₂ | 1.4 | 0.308 |
| CaO | 0.01 | 0.003 |
| MgO | 0.85 | 0.371 |
| K₂O | 3 | 0.560 |
| Na₂O | 0.23 | 0.065 |
- Equivalent weight
- 1759.7
- Fired weight
- 1611.89
- Loss on ignition
- 8.4%
The equivalent weight is the grams of Ball Clay CA1 / CA2 (Claypro, Axedale) that hold 1.0 mole of flux. The fired weight is what is left of that after firing.
Hazards and safety
Hazards: Claypro SDS (2015): about 20% crystalline silica (quartz); classified Carcinogen Category 1A (H350, by inhalation). Avoid breathing the dust.
Use it in a recipe
Add Ball Clay CA1 / CA2 (Claypro, Axedale) to a recipe in the Glazecalc calculator to see what it does to a glaze's unity formula.