[Jewelry making - Article 00972] - Re: [Orchid] Melting dish

[K. David Woolley]

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>     what I'm looking for. What are they made of? There are things called
>     crucibles, salamanders, scorifiers and fletchers!!! One company is
>     selling a "melting dish" for platinum made of some sort of silica.

    By what you mention, it should serve you well. Platinum simply, by
    my reckoning, is tested for higher temperatures than you may need
    (much better than the converse). 

    This is what I use, and used at school (not high backed at school
    mind you) 

    School time (http://www.contenti.com/products/casting/170-710.html)
    Now (http://www.contenti.com/products/casting/170-712.html and
    http://www.contenti.com/products/casting/170-711H.html) 

    Don't forget to prime the "Melting Dish"/"Crucible"... heat with
    flame (your torch), sprinkle borax, heat until melted, sprinkle
    more, and repeat until there is a good covering of
    glassified/liquefied borax over everywhere the molten metal will
    touch (including pouring spout). 

    When using, place clean material (no solder) into the crucible, heat
    until molten, continue heating (especially pouring spout, while
    pouring into ingot) so as to get a good flow. 

    Preparing ingot is what I suggest as well. When using oxy/acetylene
    I simply have only acetylene only and flash the ingot where the metal
    will pour into (the black soot issued will put a light covering that
    will act as a resist to aid in removing the poured ingot after it
    cools). I use a light oil, set aflame, and put out when using
    oxy/propane so as to make a layer of soot for the same reason as
    above. 

Best of luck and practise makes perfect,
K. David Woolley
Fredericton, NB
Diversiform Metal Art & Jewellery
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