[Jewelry making - Article 00079] - [Orchid] Ferric chloride formula

[DKJEWELRY]

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    Hi all, I need to make a large batch of ferric chloride to etch some
    copper tiles.  Does anyone know the formula?  I have a chemist who
    will mix it for me but I need to know what and how much to have him
    order. 

    Thanks, Deb Karash (in Illinois where we are about to have 10 inches 
of snow!)

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