Robin Hopper Slip
Chemistry
Recipe
| Material | Amount |
|---|---|
| Ball Clay | 75.0% |
| Grolleg | 10.0% |
| Potash Feldspar | 5.0% |
| Flint | 10.0% |
| Bentonite addition | 2.0% |
Oxide analysis % by weight
| Na2O | 0.2% |
|---|---|
| K2O | 0.9% |
| MgO | 0.1% |
| CaO | 0.0% |
| FeO | 0.1% |
| Al2O3 | 4.8% |
| SiO2 | 19.1% |
| TiO2 | 0.0% |
| LOI | 74.8% |
Some materials have no recorded composition, so the analysis covers the rest of the batch only.
This is a well known slip with wide firing range (∆04-12). Fires white, it can be used with oxides and stains to create coloured slips.
I normally make this up to 110% hydration, i.e. for 500g raw materials, add 550g water.