Granite + Iron Oxide + Titanium Dioxide
Experiments with Iron Oxide and Titanium Dioxide
Description:
Titanium Dioxide is often used as an opacifier and I like its effect in VC Matte Yellow from John Britt's book, so I thought to experiment with it. Currently I have just two examples, a line blend test (below) and a sample bowl (above) using the left over 5% mixture to glaze its outside. It's a "Carmel" and I like it.
Glaze Recipe
| Material | Amount |
|---|---|
| Mt Vision Granodiorite | 70% |
| Wollastonite | 30% |
| 100% | |
| Red Iron Oxide | 10% |
| Titanium Dioxide | 5% |
| Bentonite | 2% |
| 117% |
Firing
Kiln firing procedures are described here.
Tests
Test 1
Date 9/14/23
Type: Test Tiles
Temp: Cone 6
Kiln: Test Kiln (T28)
Clay: Sedona Red
Glaze: Mt Vision Tenmoku, 10% Iron Oxide, SG 1.43, 200ml batch
Additive: Titanium Dioxide
Method: 5 tests of 0%, 1%, 2%, 3% and 5% Titanium Dioxide by adding 0, 2, 2, 2 and 4 gm (cumulative 10 gm) without changing the amount of liquid.
| MV Tenmoku | |||||
|---|---|---|---|---|---|
| Titanium Dioxide | 1 | 2 | 3 | 4 | 5 |
| Added | +0g | +2g | +2 | +2g | +4g |
| Cumulative | +0g | +2g | +4g | +6g | +10g |
Notes:
Surprisingly good results were obtained. They speak for themselves, I think. I look forward to experimenting in this direction further. Tiles 4 and 5 are strikingly transformed. Perhaps the 5-10% range should be explored as well.