I am planning on getting a new burnout kiln, and have been advised
that in order to protect the interior of the kiln from wax residue I
should put the flasks on a tray, and to run the kiln for 1 hour at
300 degrees, then to remove the tray and flasks and dispose of the
wax drippings. After that, return flasks to kiln and continue
What puzzles me is that the kiln will have a top opening, presumably
to take care of fumes and smoke from the burnout, but nonetheless, I
have been told that I must remove the tray with the wax drippings. I
had assumed that the wax tray was there to catch the drippings thus
protecting the floor of the kiln.
With my old kiln, I just did the burnout, leaving the wax tray and
flasks in the kiln during the entire process. The fumes were
exhausted through the top vent.
My question is whether removing the flasks from the kiln would cause
problems with the investment due to thermal shock, or from being
handled at this stage in the process.