[Jewelry making - Article 01683] - Re: [Orchid] Replenish Rodium Plating Solution

[Helen Hill]

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

Hi all,

>     In general, though, when you rhodium plate (or any plate), you are
>     actually taking metal out of solution and putting it on your work.
>     We all wish that the metal in solution was eternal, but it's not.
>     There's no free ride, especially with rhodium. Now a friend who
>     plates a lot keeps his old solutions that are clean and lets them
>     evaporate till they turn orangey-brown, and uses them for
>     replenisher. Just one way... 

    As John wrote, his friend lets his used solutions evaporate until
    they turn orangey-brown. As a chemist, that's really the only way I
    can think of (without huge pieces of extortionately expensive
    analytical chemistry type equipment to measure things accurately) to
    make use of previously used plating solutions. As he says, you are
    taking metal atoms out of solution and putting it one your work and
    so there is less metal in the solution once it has been used and so
    the solution is a much less concentrated metal solution. But, as his
    friend does, if you let some of the solvent (the liquid the metal is
    dissolved in) evaporate, until it is roughly the same colour as it
    is intended, then you will achieve a roughly correct concentration of
    metal solution that you can use to add to the plating bath. You just
    have less volume, but it'll make your plating solution go further
    than it would otherwise. 

Helen Hill
Preston, UK
____________________________________________________________________
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
____________________________________________________________________