[Jewelry making - Article 00160] - Re: [Orchid] Removing rust from an old silver coin

[Gary Bourbonais]

========[ Invite a Friend - http://www.ganoksin.com/invite.htm  ]========

>     A friend of mine recently found an old silver coin (1697) with a
>     lump of what looks to be rust embedded on the face of the coin.
>     He's tried all sorts of things to get the lump off, but with no
>     success. Anyone have suggestions? 

    Now bear in mind, one might not like what you find underneath once
    the corrosion is removed....may have a patch of pitting underneath... 

    Might try soaking it in household ammonia.....I recently cleaned up
    a silver jital that way..... Time is anywhere from a few hours to a
    week, depending.... The solution might turn blue....so use a tongs or
    something to take the coin in and out....Used a small glass bowl for
    this... 

    If that doesn't do it, you can try alternating with the ammonia and
    vinegar or lemon juice....cleaning with soapy water between baths... 

    Good luck to your friend....cleaning patches like that sometimes is
    like a crap shoot... 

Gary W. Bourbonais
A.J.P. (GIA)

____________________________________________________________________
T h e   O r c h i d   L i s t
Open Electronic Forum for Jewelry Manufacturing Methods and Procedures
____________________________________________________________________
Orchid FAQ:
~ http://www.ganoksin.com/orchid/faq.htm
Orchid Archives:
~ http://www.ganoksin.com/orchid/archive
Orchid Galleries:
~ http://www.ganoksin.com/orchid/gallery.htm
Invite a Friend:
~ http://www.ganoksin.com/invite.htm
____________________________________________________________________
Tips From The Jeweler's Bench - Article Archive
~ http://www.ganoksin.com/borisat/tip_sear.htm
The Jeweler's Selected Bibliography List
~ http://www.ganoksin.com/jewelry-books
Buy Orchid Jewelry:
~ http://www.ganoksin.com/shop
____________________________________________________________________
-Unsubscribe:
-Email: orchid-request AT ganoksin.com Body=unsubscribe subject=blank
____________________________________________________________________