[Jewelry making - Article 00009] - Re: [Orchid] Platinum coated diamonds

[leonid surpin]

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>     Hydrofluoric acid is about as nasty as acid gets, you should
>     invest in gloves (gauntlets?) that are rated for this acid as the
>     effects of it on the human body ain't nice..... 

    If anyone is entertaining the idea to work with hydrofluoric acid,
    than it is important to understand that risks involved, are not usual
    risks of handling acids. 

    Hydrofluoric acid formulae is HF. When it contact the skin, Hydrogen
    splits from Fluorine. Hydrogen ion in free form is a strong acid by
    itself and can do a number on tissue, but the real danger is free
    Fluorine. It can penetrate into the tissues very quickly and very
    deeply destroying everything on its path, until it encounter Calcium. 


    ( Fluorine eagerly combines with Calcium and it's salts. That is
    exactly why it is used in toothpaste. Reaction is 2F + Ca = CaF2.) 

    When Fluorine combines with Calcium on cellular level, the cells
    containing Calcium die. Medical term is "tissue necrosis". 

    If you have to use it, never use it alone and know how what to do in
    case of accidental exposure. 

Leonid Surpin
www.studioarete.com
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