The cone 6 G1214M glaze on the left melts well. Can it benefit from a silica addition? Yes. The right adds 20% yet still melts as well, covers better, is more glossy, more resistant to leaching, harder and has a lower thermal expansion.
| Oxides | SiO2 - Silicon Dioxide, Silica |
| Oxides | Al2O3 - Aluminum Oxide, Alumina |
| Recipes |
G1214M - 20x5 Cone 6 Base Glossy Glaze
Developed by Tony Hansen in the 1980s. Its was popular for the simplicity and how well it worked with chrome-tin stains. |
| Articles |
G1214M Cone 5-7 20x5 glossy transparent glaze
This is a base transparent glaze recipe developed for cone 6. It is known as the 20x5 or 20 by 5 recipe. It is a simple 5 material at 20% each mix and it makes a good home base from which to rationalize adjustments. |
| Glossary |
Formula Ratios
The ratios of individual or group oxide molecule numbers are indicators of things like fired gloss, durability, melting temperature, balance, tendency to craze, etc. |
| Glossary |
Food Safe
Be skeptical of claims of food safety from potters who cannot explain or demonstrate why. Investigate the basis of manufacturer claims and labelling and the actual use to which their products are put. |
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