[Jewelry making - Article 00003] - Re: [Orchid] Color change in the ultrasonic

[andy cooperman]

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    Yes, Neil, I have experienced this. Sometimes in the pickle as well.
    I've chalked it up to dissolved silver in the solution that plates
    out through the solution (the electrolyte) onto the work (the
    cathode) due to a galvanic effect generated by the differences in the
    potential of the hook or another object. Ammonia seems to hasten
    this.

    I am not, nor do I claim to be a metallurgist, engineer or chemist.
    I leave the science of this to Peter Rowe or Jim Binnion. Just my
    guess.... 

Take care, Andy
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