[Jewelry making - Article 00354] - Re: [Orchid] Silicosis and quenching

[John Donivan]

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>     Proper solutions to silica control are not necessarily expensive
>     or complex, I don't do much casting anymore so I quench outside
>     with a N95 dust mask.

    One last nail in the coffin from me on this. It is simply not true
    that the lungs cannot expel silica. If that were so we would all be
    dead from silicosis, and it would be the leading cause of death. It's
    also simply not true that silica is toxic - it is completely
    non-toxic. It is hazardous, which is different. If you're walking
    down a dirt road and a car blows by, you just got a good lung full of
    silica. If you're in a dust storm or if you clean out your garage,
    the same. Sitting on a beach, which is pure silica. It is what the
    crust of the earth is made of, predominantly - the most common
    substance by far. The problems occur when you put it in faster or
    more than your body can expel. I'm not suggesting we should be
    cavalier about it because less is better for sure. It's the
    fear-mongering that I just can't abide. 

http://www.donivanandmaggiora.com
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