[Jewelry making - Article 01075] - Re: [Orchid] Silver metal clay turns brassy

[Elaine Luther]

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    Here is a post from Metal Clay Gallery yahoo list that may shed some
    light on the recent question about the metal clay turning brassy. 

    Elaine 

          I have been using dry casting investment (powder) as a support
          for odd shaped/hollow objects, I use a dust mask. It works
          great but I have noticed that the items develop a golden/brassy
          tarnish, at the contact points with investment, within 10
          minutes in my tumbler. Scrubbing with a wire brush doesn't
          remove it. This tarnish only comes off with (yikes)Tarnex! I've
          tried a good long soak in strong hot pickle and it just doesn't
          work as well. After the 2 minute Tarnex dip I rinse it in water
          then neutralize it in hot baking soda and water. The pieces
          tumble up beautifully after the dip. I <snip> Vicki 

Elaine Luther
Metalsmith, Certified PMC Instructor
http://www.CreativeTextureTools.com (TM)
Hard to Find Tools for Metal Clay

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