02-26-2008, 09:58 PM
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Officially Middle-Aged Rocketeer
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Join Date: Mar 2005
Location: Portland, OR
Posts: 1,356
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Quote:
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Originally Posted by Ltvscout
Is it Alum? I thought it was maybe a powdered citric acid.
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The 'Rocketeer's Journal' called it 'citric bicarbonate'. Newer versions use vinager and baking soda.
Sean |