| Test No. | Recipe | % | Added Colorant |
| Test 1 | Frit (WZBF) | 50% | 8 g |
| Silica | 50% | 8 g | |
| Test 2 | Frit (WZBF) | 50% | 8 g |
| Potash Feldspar | 50% | 8 g | |
| Test 3 | Frit (WZBF) | 50% | 8 g |
| Flint | 50% | 8 g | |
| Test 4 | Frit (WZBF) | 50% | 8 g |
| Quartz | 50% | 8 g |