How to make a simple plastermould for slipcasting ceramic by plastercasting

This vid shows how we cast plaster into a simple positive mold, consisting of a plaster core and surrounded by an improvised metal holder. The core has been cast before on a turning table and cut in the right shape as the plaster was still not entirely dry. In this way the negative mold are being cast one at a time. And in those mold the slip is finally cast.