[Stoves] Crispin´s kiln. (was Re: Traditonal Charcola Making Process / retort

[Crispin Pemberton-Pigott]

Dear Jeff

I think the only swelling is the bloating of the clay that is sealed on the
outside by melting.  The charcoal itself or parts of it evaporate.

>Could the charcoal be pre-swelled?

If the outer surface is sealed by heating, it is nearly impossible to get
the charcoal out after that.

Regards
Crispin