[Jewelry making - Article 00466] - Re: [Orchid] Bronze casting porosity

[Bill Bates]

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    Carlos: I looked at your casting. 

    1.  If you put a round ball between the part and the button , about
    half way between.  This will help out on the Porisity problem/ . 

    2.  Make sure that the button has at least 1 1/2  to 2 1/2 times the
    weight of the part. 

    3. Before you cast the part prepare a container that has at least 2
    to 3"" space from the part to the outside of the container andatleast
    4'' from the bottom and 4'' from the part to the top os the dand that
    has been throughly dried. 

    4.  Before the part is cast prepare the container by pouring silica
    sand such as play pen sand that Home Depo sells. 

    5.  Pour sand in to about 3 or 4'' deep . 

    6.  Before the part is cast have a gas torch ready to light by the
    sand container. 

    7.   When the part is cast put in the container on top of the sand
    and fill with additional sand to the top of the button. 

    8.    Light the torch and play the flame onto the button until it is
    slight red and then cover with the ramaning sand to at least 4 to 5''
    above the button. 

    9.   Let it cool down for a couple houra or more. this ahould help
    out on the porisity problen. 

    10.  The button has to be the last to cool last. 

Yours :
Billy S. Bates
royalminiatures.com


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