[Jewelry making - Article 00127] - Re: [Orchid] PnP changing color

[Roger Bowersox]

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>     Does anyone have the recipe for the Muriatic Acid / Peroxide mix? 

    One part Muriatic Acid
    Two parts Hydrogen peroxide
    Proportions do not need to be exact.
    Use good ventilation.

    This PCB etcher uses bottle caps as measuring tools and has a good
    description of how to etch a copper circuit board. 

    http://elec.projects.googlepages.com/etchapcb
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