[Jewelry making - Article 00511] - Re: [Orchid] Acetylene - Safety Information

[musher]

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    The problem acetylene gas in contact with copper is that it forms a
    solid copper acetlyide.  These are shock sensitive and explosive. 
    The same is true for silver.  Fortunately the reaction is slow and
    acetylene gas cylinders typically have acetone in them to retard
    metal acetylide formation (in the cylinder).  Fortunately for all of
    us, the burning acetylene on a silver or copper surface is not a
    problem.    

-Brian

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