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Hello. I have a hige problem with bubbles in my work. It is slipcasted porcelain in a closed mould. Does anyone know what the problem could be? The air shouldn't be trapped as there are enough holes in the highest places. The bubbles are inside and on top and bottom of the casting. I would really,really appreciate any help!!


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You might be adding air bubbles to your slip when stirring/mixing. If you think that's the case, try tapping/banging on the slip container before pouring to work out some of those bubbles. If the slip is very thick, it may hold onto bubbles, not allowing them to move easily up and out. Experiment with thinning the slip, a little at a time, in a small batch. Air bubbles should move easily to the surface to pop in the container before you pour into the mold.

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