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Old 01-29-2005, 10:03 AM
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Shakudo Shakudo is offline
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Join Date: Nov 2003
Location: Minnesota
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you don't use nitric at all until you have practiced with copper sulfate or another fairly safe etchant first. nitric acid does come in several strengths an antonio probably isn't using more than a 25% solution. nitric acid is also on the terrorist alert list and is not as easily availible as it was a few years ago.
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