Re: [CAD_CAM_EDM_DRO] Re: Machineable wax problem

jvicars@... wrote:

>
> Odor has nothing to do with toxicity. If you guys are trying out new
> materials for burning out then spend a few minutes and pick up the
> MSDS. You guys mentioned Delrin. Delrin releases formaldyhyde when
> burned.

MSDS doesn't mean a thing since they are written by the maker of
the product. I have contributed to MSDS work and know that the
stuff in there about toxicity can be misleading to casual readers
who don't know much about the jargon.

No, odor doesn't necessarily indicate toxicity, but to say that
it has nothing to do with it is a bit cavalier. Out of the
millions of oders human beings can sense, there are hundreds that
are certainly toxic. Oder is a first line sense defence against
things that are potentially hazardous. As a consequence, a good
rule of thumb is "if you can smell it, avoid it." I am talking
industrial chemical stuff here, not the trees and flowers.

Formaldyhyde is toxic. Don't breathe its vapors. Most burning
plastics are toxic. We had a local fire at a plastics recycler
some weeks ago that send a couple thousand people to the
hospital. Some of the people were actually genuine, others went
to establish a precident for a law suit.

JerryK