Sibelco V161 Ball Clay
A standard material in Glazecalc's library: its oxide analysis, unity contribution and hazards.
What it is
- Kind
- Clays
- Formula
- SiO₂ 62.9%, TiO₂ 1.4%, Al₂O₃ 24.1%, Fe₂O₃ 1%, Na₂O 0.3%, K₂O 2.8%, LOI 6.8%
- Also called
- V161, V 161, Sibelco V161
- Made by
- Sibelco Deutschland GmbH (Westerwald, Germany)
- Sold in
- EU
- Similar materials
- HVAR Ball Clay , OM-4 Ball Clay
- Source
- Sibelco ceramics product selector, 'Glaze & Engobe : Clay : Technical Specifications' (2019-02)
A German (Westerwald) ball clay that Sibelco lists for glazes and engobes: very fine (69% under 2 microns), light-firing, with about 24% alumina and 2.8% potash. Its analysis is close to the English HVAR ball clay.
Oxide analysis and unity formula
Glazecalc has the analysis of Sibelco V161 Ball Clay as weight percent of the raw material. The unity contribution is the moles of each oxide in the amount of Sibelco V161 Ball Clay that holds 1.0 mole of flux, which is how Glazecalc adds it into a recipe's unity formula.
| Oxide | Weight % | Unity contribution |
|---|---|---|
| SiO₂ | 62.9 | 30.287 |
| TiO₂ | 1.4 | 0.507 |
| Al₂O₃ | 24.1 | 6.838 |
| Fe₂O₃ | 1 | 0.181 |
| Na₂O | 0.3 | 0.140 |
| K₂O | 2.8 | 0.860 |
- Equivalent weight
- 2893.02
- Fired weight
- 2696.3
- Loss on ignition
- 6.8%
The equivalent weight is the grams of Sibelco V161 Ball Clay that hold 1.0 mole of flux. The fired weight is what is left of that after firing.
Hazards and safety
Hazards: Ball clays contain free quartz; avoid breathing the dust.
Use it in a recipe
Add Sibelco V161 Ball Clay to a recipe in the Glazecalc calculator to see what it does to a glaze's unity formula.