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These are cone 6 commercial glazes made by a popular US manufacturer. The body is a cone 6 casting porcelain made by another popular manufacturer. Zoom the photo to see they are all crazing! Which company is at fault? Neither is able to assure a match of their product to others. The pattern we see here points the finger first at the body. Mid-fire porcelains craze glazes if they lack sufficient silica (20% is minimum). It is difficult for manufacturers to achieve this since more feldspar, at the expense of silica, is needed to vitrify the body. And the recipe of the porcelain is proprietary. You already have a propeller mixer, scale and containers so why not mix your own porcelain from a recipe (e.g. L3778D or derivative)? Glaze fit is also a matter of chance. Mixing your own transparent brushing glaze or dipping glaze would provide another level of control (e.g. G2926B or derivative).
Glossary |
Deflocculation
Deflocculation is the magic behind the ceramic casting process, it enables slurries having impossibly low water contents and ware having amazingly low drying shrinkage |
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Glossary |
Fluid Melt Glazes
Fluid melt glazes and over-melting, over fired, to the point that they run down off ware. This feature enables the development of super-floss and cyrstallization. |
Articles |
Where do I start in understanding glazes?
Break your addiction to online recipes that don't work or bottled expensive glazes. Learn why glazes fire as they do. Why each material is used. How to create perfect dipping and drying properties. Even some chemistry. |
Articles |
Glaze Recipes: Formulate and Make Your Own Instead
The only way you will ever get the glaze you really need is to formulate your own. The longer you stay on the glaze recipe treadmill the more time you waste. |
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