Monthly Tech-Tip | No tracking! No ads! |
These are four different cone 6 commercial glazes made by a popular US manufacturer. The body is a cone 6 casting porcelain made by another popular manufacturer. They are all crazing! This is visible because the glaze is transparent, but most often it is much more difficult to see. Guess what many people are doing? Ignoring the problem and selling the ware! Assuming you are not one of them - which company is at fault? Neither. They cannot assure their product fits those of others. Mid-fire porcelains craze glazes if they lack sufficient silica (20% is minimum) or don't vitrify. Unfortunately, the recipe of the porcelain is proprietary. Wait a minute - no, it isn't. These recipes are well-known. You already have a propeller mixer and scale to mix casting slip, why not mix your own porcelain from a recipe (e.g. L3778D or derivative)? Or, why not mix your own transparent brushing glaze or dipping glaze? Start with the G2926B recipe, it has lots of documentation, and the recipe can be adjusted to deal with fit issues on any clay body.
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 |
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 that you could DIY. Learn why glazes fire as they do. Why each material is used. How to create perfect dipping and brushing 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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