Gold Star Ultima,
Gold Star XL and Gold Star 21 have been specifically designed
to withstand the most punishing ‘burnout’ cycles without
detriment to the finished castings. The steam release and
thermal shock resistance characteristics of Gold Star Ultima,
Gold Star XL and Gold Star 21 enable complete cycles to be
achieved in 6 hours or less as shown in the example. Limiting
factors to the speed at which burnout can be achieved are the
heat output of the furnace used and the number and size of
flasks in any one firing.
