On Wed, 06 Oct 2004 10:47:09 -0700, tyvek wrote:

Ahoy- been using Ortho 3hrs per day outside for about a week in my
laminating project. No grinding yet. I use a half face respirator with
7500-3 cartridge but I used a 7500-1 for one of those days. (Norton?).
Now I seem to have quite a noticeable sore throat. I can't seem to
find much info about which cartridge to use, all the sites concerning
fiberglass work just say to use one. Resin doesn't sound like "organic
vapor" to me. I can't smell anything bad while working with the goo or
cleanup materials.
I'm almost done but I don't want to do anything that would result in
some kind of permanent lung damage or end up in the big boatyard in
the sky sooner than expected. Any notes from savvy users? Maybe I'm
just getting a cold or something. All right, keep paddling, all of
you,..

I think epoxy is regarded as organic before hardening. Polymers are based on
oil products, and are organic.

Epoxi is allergenic and filters with active carbon is the right stuff.

I can't recall that your throat reaction is typical though. Do you have low
moisture in the air?


Morgan O.

On Fri, 15 Oct 2004 10:25:20 GMT, tyvek wrote:

On Mon, 11 Oct 2004 12:45:51 GMT, Morgan Ohlson
wrote:

On Wed, 06 Oct 2004 10:47:09 -0700, tyvek wrote:

I think epoxy is regarded as organic before hardening. Polymers are based on
oil products, and are organic.

Epoxi is allergenic and filters with active carbon is the right stuff.

I can't recall that your throat reaction is typical though. Do you have low
moisture in the air?


Morgan O.

Hi Morgan. Lots of moisture here. My local paint specialist says that
you have to bag and store the filters in a dry place after each use or
they will become ineffective

Yes, but not useless. Think they can be dried in kitchen owen.


as they absorb moisture from the air. I
finally located a new 7500-3 set and I notice immediately that I can
breath properly through the mask, whereas before I had trouble drawing
air after a few minutes. So the cartridges were probably full and I
was getting crud through them even though I couldn't smell it. Worked
today without any trouble. Thanks. t

Great!

Active carbon filters can be washed and reactivated whith realy hot water
steam, if available.

Morgan O.