> Potassium Chlorate fitted that slot for us. 

Same for me. Mix with almost anything powdery, in any reasonable ratio, 
and it will go. In those days some local chemists still sold all kinds 
of interesting chemicals, and word about them got around quickly in 
certain circles. Most of the stuff I used back then is not sold publicly 
any more. Even the school lab was not allowed to stock some of the stuff 
even then.

-- 

Wouter van Ooijen

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Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu

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