pillowcase as dust bag

Will a high count(like 330 threads/inch)pillowcase work well as a dust bag?
1/330 x 1/2 =1/660 inches * 25.4 mm/inch * 1000 micron/mm = 38 microns
I used 1/2 in the above calculation imagining that the holes in the fabric are about equal to the thread diameter. What's a more realistic value?
What's a reasonable value for a real dust collection bag?
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Under 5 microns is ok. Preferably 1 micron or less.
-- Regards,
Dean Bielanowski Editor, Online Tool Reviews http://www.onlinetoolreviews.com ------------------------------------------------------------ Latest 5 Reviews: - Infinity Router Bits - Incra Wonder Fence - Veritas Jointer Blade Sharpener - Miller Dowel System - Robert Sorby Woodturning Chisels ------------------------------------------------------------
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On 23 Oct 2003 19:07:53 -0700, snipped-for-privacy@newarts.com (dave martin) brought forth from the murky depths:

You're from Ohheeoh, ain'tcha? (Or was that Michigan?)
---------------------------------------------------------- * Michelangelo would have made ** Website Programming * better time with a roller. ** http://diversify.com ----------------------------------------------------------
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GI blanket better. More paths to daylight = more slow air for small stuff to come to rest.

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