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Rather than L4807 being just another cone 6 porcelain casting slip recipe it is a pattern of the flexibility potters/hobbyists could have in making their own bodies. This has incredible casting speed. If someone tells you that porcelains are always difficult to cast, tell them it’s time to go DIY.
Typical slips made from ball clay and talc (or mixes of common feldspars, clays and quartz) take 20-30 minutes to get the needed thickness (in our circumstances and assuming a new dry mold). But this one poured out in 12 minutes and I can demold in 10 minutes. The secret is not the recipe, this is similar to a typical 25-porcelain. The secret here is choice of kaolin and ball clay. This employs OptiKast Kaolin and KT#1-4 ball clay, both are large particled clays targeted at slip casting. They can be traded off for each other, more ball clay imparts better leather-hard strength but casts slower, more kaolin does the opposite. This is one more reason to mix your own casting bodies.

This picture has its own page with more detail, click here to see it.
How would you like to be able to create a parametric CAD model of a teapot lid? Then 3D print a case mold and pour a multi-piece plaster working mold? Imagine easily making multiple-size one-off molds to accommodate any teapot you throw!
This is perfect for M370 or Polar Ice (both have throwing and casting versions). Or, how would you like to be able to formulate a casting slip having the same appearance and degree of maturity as the throwing body you use? More information coming soon (based on the L4807 casting body).
Next, imagine casting the handles, rims and spouts also. Information on how to draw and print them also coming soon.
| Materials |
OptiKast Kaolin
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| Glossary |
Casting Rate
Casting rate describes how quickly a layer of clay builds against the mold surface during slip casting and how quickly items release from molds and can be handled. |
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