[Jewelry making - Article 01029] - [Orchid] Colour change in the ultrasonic

[Helen Hill]

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    Having received a lovely diamond half eternity ring from my husband
    for Christmas, I decided to put my engagement ring through my
    ultrasonic to give it a good clean. I noticed later in the day that
    the yellow gold shank of my engagement ring was much paler than it
    should be - almost having the colour of unplated white gold. The ring
    is yellow gold with a platinum head. I use ammonia in my ultrasonic. 

    I've searched the archives and found a couple of replies to the same
    problem but they didn't really answer the question definitively. One
    suggestion was that it was plated with silver and that there was
    some galvanic effect going on. The silver makes sense as I am only
    making sterling jewellery at the moment so that is what goes in the
    tank on a day to day basis, with the occasional piece of gold being
    cleaned. If it is being plated with silver particles, will a quick
    polish and then ultrasonic cleaning in fresh solution restore the
    yellow gold colour? 

Thanks in advance.
Helen Hill
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