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Right: Ravenscrag GR6-A transparent base glaze. Left: It has been opacified (turned opaque) by adding 10% Zircopax. This opacification mechanism can be transplanted into almost any transparent glaze. It can also be employed in colored transparents, it will convert their coloration to a pastel shade, lightening it. Zircon works well in oxidation and reduction. Tin oxide is another opacifier, it is much more expensive and only works in oxidation firing.
| Recipes | GR6-C - Ravenscrag Cone 6 White Glossy Plainsman Cone 6 Ravenscrag Slip based white glossy glaze. It can be found among others at http://ravenscrag.com. | 
| Materials | Zircon | 
| Materials | Zircopax Zirconium silicate, its principle use in ceramics is as an opacifier in glazes. It is an expensive material, but less so than tin oxide. | 
| Materials | Tin Oxide Its principle use in ceramics is as an opacifier in glazes. It is very expensive. | 
| Articles | Concentrate on One Good Glaze It is better to understand and have control of one good base glaze than be at the mercy of dozens of imported recipes that do not work. There is a lot more to being a good glaze than fired appearance. | 
| Oxides | ZrO2 - Zirconium Dioxide | 
| Glossary | Opacifier Glaze opacity refers to the degree to which it is opaque. Opacifiers are powders added to transparent ceramic glazes to make them opaque. | 
| Glossary | Mechanism Identifying the mechanism of a ceramic glaze recipe is the key to moving adjusting it, fixing it, reverse engineering it, even avoiding it! | 
| Glossary | Glaze Recipes Stop! Think! Do not get addicted to the trafficking in online glaze recipes. Learn to make your own or adjust/adapt/fix what you find online. | 
| Glossary | Base Glaze Understand your a glaze and learn how to adjust and improve it. Build others from that. We have bases for low, medium and high fire. | 
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