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Old 07-06-2010, 04:04 PM   #4
Mister Bob
Babbling Farker

 
Join Date: 06-15-09
Location: Scituate, RI
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None whatsoever! The smoke ring is caused by the nitrates created by burning wood. This will even happen with a very clean burning fire with no visible smoke at all. A 'smoke' ring also can be artificially created using Morton's Tender Quick or some other tenderizer containing nitrates.
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Mister Bob, Pitmaster - Smokestack Lightning, Bad Ass Barbecue. KCBS CBJ #31759 - IMBAS Certified MOINK Baller
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