[Jewelry making - Article 00539] - Re: [Orchid] Air filter / respirator tip

[doug]

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Hi Nugget,

    About your comment, 

>       How do you know if the cartridge in the respirator is good? (et
>     al)

    in Thursday's list, 

    I don't understand how this refers to most of the respirators out
    there in general circulation. I'm guessing it may well apply to those
    intended for lead, VOC or other odor removals, in which the activated
    carbon prefilters are expected to attract and absorb the oxides,
    nitrates, alcohols or esters involved, but I'm hard pressed to
    explain how VOC's like those you've mentioned would be diminished or
    removed by standard spun-glass or polyester particle filters. Out of
    curiosity: where on that site did you find the mention of this, and
    what was the context in which it appeared? 

Curiously,
Doug
Douglas Turet, G.J.
Lapidary Artist & Designer
Turet Desig
P.O. Box 242
Avon, MA 02322-0242
doug AT turetdesign.com

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