[Jewelry making - Article 01594] - Re: [Orchid] Understanding Casting Shrinkage

[brainnet]

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    I agree with Bill that it is the unseen particles that are the most
    dangerous. 

    Methods of reducing the danger include having local (right at the
    source, within inches of where it is being generated) ventilation,
    and allowing the object to cool to room temperature and then removing
    the investment. (a royal pain in the neck and time consuming). 

    An abatement method is to use 'floaters' in the quenching container.
    This means you have a bunch of floating objects on the surface of the
    liquid so that material vented into the air is reduced. For
    electroforming you can buy floating nalgene 'cross-like' shapes which
    overlap. The purpose there is to reduce evaporation rates. 

    Cheap jewelers working with quenching a flask might for instance use
    a whole lot of wine corks, so many that they are about 2-3 thick on
    the surface. You quench through this and the emitted particles are
    reduced. So ask your friends to collect corks for you or have a
    really big party..... 

best
Charles
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