Plastic containers with screw on lids that come in packs of 2 from the dollar tree with a screw on lid you can get a tighter seal than you can with snap on lids which means your slip will still be usable the next time you need to use it.
Ceramic slip making.
In this post paul andrew wandless shows you how to make casting slip from a clay body normally used for throwing or handbuilding.
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That seems a lot less trouble.
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Why use bone dry clay to make slip.
Standard ceramic slip sold by dogwood ceramic supply.
Standard ceramic supply s ceramic slip is a superior premixed ready to cast talc based nontoxic low fire white earthenware ceramic casting slip manufactured by standard ceramic supply and stocked and sold by dogwood ceramics for use by schools production studios and ceramic hobbyists.
A gallon of good ceramic slip should weigh 14 5 pounds plus a smidge.
Why not start with moist clay.
Everyone who describes how to make slip fails to answer this burning question.
This can either be scraps left over from the pottery you have been making.
Chinese cizhou ware vase with cut glaze decoration.
Or you can easily make it by cutting of some thin slabs from your clay block.
Not only does ceramic mold making enable you to repeat a form over and over again it also makes individual forms lose their preciousness which frees you up to experiment more.
Ceramic mold making opens up endless potential for creative expression.
Miletus ware showing a red body covered by white slip then painted in blue c.
First you need to collect some scraps of bone dry clay.
Phoenician plate with red slip now wearing away 7th century bc.