You can use any kind of heat. There are several possibilities to get the ideal temperature of 300°C for the stone.
- on direct flame: electric- or gasstove (put a flame sieve between flame and stove), oven, fire-place, barbecue or glowing fire.
- indirect flame: oven
Time to get the right temperature of the stone:
direct flame:- 30 min. (to get the right temperature), the stone keeps its temperature for 60 min.
indirect flame:
- oven (250 - 300°C) 60 min. (to get the right temperature), the stone keeps its temperature for 60 min.