Finished pieces are soft after drying. See mixing instructions for selected product, or select a stronger product. See drying section for detailed drying instructions.
Finished pieces have small holes on the surface.
Sift plaster into the water evenly. Do not allow large quantities to fall into the water at one time. Let the plaster soak completely until all particles are wetted. Thoroughly mix with a mechanical mixer having the propeller adjusted so air is not whipped into the mix. Air entrainment is a widespread problem and should be constantly guarded against.