[Jewelry making - Article 00260] - Re: [Orchid] Silicosis and quenching

[Paul Finelt]

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    Please don't tempt nature and fail to protect yourself. We like you
    and don't even know you. LOL 

    A significant body of knowledge exists that points to silica in the
    cristobalite form found in investment powders IS hazardous material.
    Significant amounts of microscopic particles are created during
    quenching. Microscopic particles are the most dangerous since your
    normal, natural protection will not prevent these particles from
    reaching the deepest parts of your lungs where they cannot be
    expelled by normal processes ( coughing and sputum ). Anecdotal
    stories about people who inhaled, indigested or otherwise absorbed
    investment powders are not something you should base your life on.
    This is serious 'stuff' that should be handled with understanding.
    (sound of dead horse being beaten) 

Thanks for being safe.
Paul Finelt, CIRM
http://www.finelt.com
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