Alm Ceramics 0 Posted May 3, 2019 Report Share Posted May 3, 2019 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!! Anna Quote Link to post Share on other sites
neilestrick 4,446 Posted May 3, 2019 Report Share Posted May 3, 2019 Are you tapping/vibrating the mold to get the bubbles to move out? Rae Reich 1 Quote Link to post Share on other sites
Alm Ceramics 0 Posted May 4, 2019 Author Report Share Posted May 4, 2019 @neilestrick Yes I am. I am starting to think it might be the plate beeing too thivk for slipcasting... I'm running out of ideas.. Quote Link to post Share on other sites
Rae Reich 478 Posted May 4, 2019 Report Share Posted May 4, 2019 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. Quote Link to post Share on other sites
Mark C. 4,726 Posted May 4, 2019 Report Share Posted May 4, 2019 If the mold is closed how does the slip get into it??? Quote Link to post Share on other sites
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