On 4 May 2018 at 06:18, sdwheaton via Stagecraft <stagecraft at theatrical.net> wrote: > The trouble with Sal Ammoniac is that if you overheat it you get > hydrochloric acid in gas form. It looks like you will ALWAYS get hydrochloric acid, as it is necessary for the effect to work: http://pyrodata.com/chemicals/Ammonium-chloride Nigel Worsley