Re: safety - pcb dust hazard

Hi Marriss,

I thought it was a good thread and not tedious.

and I hope you saw the compliement in the comment
about your brain cells. you are one of the
smartest people on this list and I think most
of us read your posts with interest.

now about hydrogen...
seems like machining hydrogen would be a
daunting task, everything under pressure
to get a solid to cut, and if someone
mistakenly opens the door wooosh ! all gone.

we probably will need a new list !


and to let our list mom know, I think this
thread has reached it's conclusion.


Dave

--- In CAD_CAM_EDM_DRO@y..., "mariss92705" <mariss92705@y...> wrote:
> Dave,
>
> I meant it all in fun. I have pretty much given up on worrying
about
> the catastrophy de jour. Life is way to short and should be enjoyed
> rather than feared. So much of the stuff that is out there sucks
the
> sheer pleasure out of existance, and frankly I feel it makes no
> difference in the long run except to make you fearful. Life is
fuller
> and lusher than that, it is meant to be enjoyed like a beautiful
> woman, with all your senses alive and alert.
>
> I was wrong about aluminum. The metal that is orders of magnitude
> more plentiful on the surface of the earth is hydrogen, primarily
> locked up in water and salts. Most probably people don't realize
> hydrogen is a metal. Hydrogen embrittles steel. It forms a metal
> alloy with it. Hydrogen takes the place of a metal ion in molecules
> like hydrogen nitrate (nitric acid), hydrogen cloride (hydrochloric
> acid), etc. Under sufficient pressure (enourmous by the way), it
> reveals its true nature by becoming metallic in every sense of the
> word. Interstingly Jupiter is metallic hydrogen for two thirds of
its
> radius according to the latest findings.
>
> Mariss
>
> --- In CAD_CAM_EDM_DRO@y..., "dave_ace_me" <davemucha@j...> wrote:
> > Hi Mariss,
> >
> > I guess I did over state that a little. Steel is more common to
us
> > and is not found in nature.
> >
> > Aluminum, as a pure substance is not found in nature as it
readily
> > reacts with both bases and acids. Aluminum salts are pleantiful
as
> > you pointed out, and are in many of the things around us.
> >
> > Aluminum, that atom, Element 13, AL, has 3 electrons in the 3rd
> ring
> > which makes it so reactive, and why it is bound in nature.
> >
> > When we refine it and make pure Aluminum, the outter surface
reacts
> > quickly with oxygen forming a protective coating. when we cut it
> or
> > grind it, then inhale it, it reacts with our body chemistry. dry
> > mouth is one sign of breathing alumunim dust or powder.
> >
> > Aluminum cooking utensils react with many foods and some of the
> > resultant chemical compounds released are toxic. You can find
this
> > data easily on the web.
> >
> > Although not proven to the FDA's level of requirements, aluminum
is
> > considdered one of the major factors in Alzheimers, not that any
of
> > use would remember though.
> >
> > As a general guideline, don't breath insdustrial fumes regarless
of
> > the quantity. Solder off gasses lead and although the effects
may
> > not be seen by you in your life, others with lesser active brain
> > cells may notice the effects more quickly.
> >
> > In my experiance, I get really dry and cracked skin when washing
my
> > hands is any good soap that cuts oils and removes dirt.
> >
> > Live in a bubble ? no
> > open a window when convienient ? certanly. but I think most of
us
> > take some measures when the stuff we work on stinks, is dusty or
in
> > some way annoys us.
> >
> > My earlier post was to illistrate how easy and innexpensive it is
> to
> > add those particulate/odor/dust and chip removal devices in a
> shop.
> > I was amazed at how elaborate people get when venting plasma
> cutting
> > machines. some of those guys spend real money!
> >
> > and just because someone is paranoid, doesn't mean someone isn't
> out
> > to get them !
> >
> >
> > Dave
> >
> >
> >
> >
> > --- In CAD_CAM_EDM_DRO@y..., "mariss92705" <mariss92705@y...>
wrote:
> > > Dave,
> > >
> > > Actually aluminum is the most common metal available on the
> surface
> > > of the earth. If I'm not mistaken, all clay is composed of
> aluminum
> > > salts and oxides, as are most soils and rocks.
> > >
> > > Mariss
> > >
> > > --- In CAD_CAM_EDM_DRO@y..., "dave_ace_me" <davemucha@j...>
wrote:
> > > > Hi Andrew,
> > > >
> > > >(snip)
> > > >
> > > > Seems aluminum is the ONLY common metal NOT common in
nature.
> > your
> > > > body uses iron, boron, zinc, copper.. you name it. but not
> > aluminum.
> > > >
> > > > Dave