I have been trying unsuccessfully this summer to take wax castings
from clay moulds and wonder if any Orchidians can help out. I’ve
made a clay impression of textured rocks. The idea was to pour molten
wax into the mould and then I’d get a positive impression of the rock
texture. I have been using a very fine earthenware red clay from a
potter friend. It successfully picks up minute detail. I have tried
every type of wax I had on hand (red, blue and a green "Pour-a-Tex"
and most recently a turquoise injection wax). I’ve tried pouring the
wax in when the clay is wet, dry, very dry, heated in the oven to
about 300 - 350 degrees F. The problem is that bubbles begin to form
in the wax once it hits the mould regardless of the temperature or
dryness/wetness of the clay. My idea had been to soak off the clay
once the wax had set, with little damage to the wax.
Any suggestions or hints would be greatly appreciated.
Sandra Noble Goss
Owen Sound, ON Canada