[Jewelry making - Article 00950] - Re: [Orchid] Stains on Rubber molds

[E. Luther]

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>         The stain that you speak of is an oxide that results when high
>     copper bearing alloys-- copper, bronze, brass, tumbago-- are
>     vulcanized. ) Sulfur in the rubbers reacts with the copper, I
>     think.) You can certainly use bronze masters (after all, the
>     "button formers" are bronze). 

    Does this also apply to silicone mold making material? 

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

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