[Jewelry making - Article 01223] - [Orchid] Copper Models Patching

[S . C . Versillee]

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    I'm in the process of creating some metal master models for casting.
    These models are etched and engraved. Under even the most controlled
    situations etching can produce some surprises. I need to patch a
    pinhole hear or there and in the areas where a line or edge was
    lost, I need to build this back up and re-sculpt it. 

    The dilemma is that the material I use to fix these imperfections is
    going to determine what type of molds I have made from the models. I
    need to choose between vulcanized molds or silicone. Even though I
    will lose some size, I preferred vulcanized rubber because it is
    stronger, but if I use wax as my patching agent, then  I will have
    to go with silicone, which may break down in a few years causing me
    to have to pay for new molds for all of these models again, and
    there is quite a few. I also tried using soft solder, but it  didn't
    allow me the control I require. 

    So the question: what do any of you on-list suggest I use as a
    patching material for copper models? 

Thanks all for reading.

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