This is a very interesting report that discusses the hazards of wood dust.
It also confirms Bill's statement regarding the risks with certain particle
size. To paraphrase, greater than 5 micron dust will collect almost
entirely in the nose, but 0.5-5 micron will be deposited in the respiratory
tract.

Here's the link:

http://ehp.niehs.nih.gov/roc/tenth/p...s/s189wood.pdf

--

There are no stupid questions.
There are a LOT of inquisitive idiots.


"Igor" wrote in message
...
I searched in the archives for a discussion on 1 micron versus 5 micron DC
bags -- i.e., is it worth the extra money -- and could not find anything.
My hunch is that it is there but I missed it, but in any event, has anyone
here gone from a 5 to a 1 and noticed a substantial difference -- in dust
"leakage" through the bag and/or quality suckage?

(OTOH, if someone out there is a better Booler than I, I will take the
embarrassment of a pre-formatted google link.)

BTW, I have read Penn State's ode to air flow and 5 micron bags

(http://www.pennstateind.com/Merchant...&Store_Code=PS
I),
and I assume that they and other vendors would make the same case for the
1
micron. But, as with an earlier post of mine, I'd like to hear any
real-world accounts. Thanks.