I used plaster of paris in a ceramic mold, and some plaster got stuck to the mold, i tried to wash it off but it didnt come off and now it has harden on the mold, is there any chemical or anything that can take the plaster out?
Unfortunately ceramic molds are porous, plaster of paris seeps into the pores and once dry, will lock inside the pores permanently. In order to use plaster of paris, or anything besides clay in a ceramic mold, you need to lock the pores with a release like Vaseline or mold soap. To get the plaster of paris out, you will need to grind it down with sandpaper. I would recommend using a chisel to get off the big chunks first. If you go too far, just fill it in with thick plaster and then shave it down before it gets completely hard.
i take advantage of plasticine or clay to make the unique. whilst utilising clay, I coat it with vaseline or hand cream. I positioned the unique in a container , and then fill it halfway up the statue's intensity with paraffin and mark it a with felt tip pen whilst it dries, I pour the plaster into the container. whilst it dries, I soften the paraffin and shrink numerous pyramid-formed pivots interior the 1st 0.5 of the mildew. this could be the place the two mildew halves meet up whilst casting. next, I repeat the technique in the different 0.5 of the statue. If the unique has arms or comparable systems, I ought to make better than one mildew. For the copies i take advantage of Resin, Instamorph Moldable Plastic, Apoxie or Plaster of Paris (my mom makes use of sugar syrup to make sugar animals).
