will edwards on thu 1 feb 01
Hello,
They are both pro's and con's with the use of any of the transition metal=
s
among other materials we use. It made sense to me when it was stated that=
the
work was artistic and non-functional in relation to food bearing surfaces=
=2E
That was nice to be included in the post since the volume was high in tha=
t
repsect. (Good post)
How much exposure is the potter willing to accept is of course their own
choice. Toxins and hazards exist throughout our industry as most all of y=
ou
know. In the past limits were placed on industrial workers and miners as =
well
as those who live where manganese is present in high amounts.
Bioavailale manganese is in water and of course fumes where MnO is presen=
t and
as a dust. Iron and MnO are notorious for being considered a color issue =
where
water is concerned and taste. (Does Florida ring a bell?) The human live=
r
takes care of about 20 ml's of this material according to the research I =
have
studied. This leads me to consider that some observation such as headache=
s and
disorientation, speech problems as well as memory loss would give the per=
son
some time to consider what may be going on? It is excreted with bile thro=
ugh
the kidneys but when it is large amounts, then it becomes a toxin to the
system where accumulated over time (Chronic) and thus accute once the sys=
tem
is over-loaded. If the potter was using filtration masks and venting fum=
es
out of the area and precautions used like we would for many other element=
s,
then it would appear to me to be an unlikely candidate for mass eviction =
of a
material that is already the 12th most abundant substance in the Earths
crust.
1995 it is suggested that 0.005 mg/kg/day in drinking water is acceptable=
=2E
Also metal workers where fumes in welding is also known to cause matal fu=
me
fever but subsides after exposure is removed. My conclusion is: Some peop=
le
tolerate many things and others cannot. The immuno effects and toxins are=
prone to show up where disease and factors of continued exposure levels a=
re
present. Sub-chronic symptoms are reversable where as chronic (long term)=
are
not always reversable and can lead to severe damage. =
http://www.alternativedr.com/IMCAccess/ProfSupplements/Manganeseps.html
I am not a toxicologist. I do research and am a potter/director with an
interest from my past on such isses. (Owner/inventor of artists colorants=
for
water-based technology)I hope you use information like this to conclude y=
our
own opinions only! No one is sure any longer on anything until it gets
attention. (Good/Bad) Then the tables are applied accordingly. Magnesium =
is Mg
and manganese is Mn.
Maybe if we get lucky we can try and get Mary Simmons and a few others ba=
ck on
here that work in labs and toxicology to fill the gaps in my information.=
Last - For those who ask a question regarding anything. Archives are grea=
t but
mistakes get archived and it is still viable to ask a question where up-2=
-date
information or corrections can be made. Check the archives and then tell =
those
who tell you to check the archives that you did and now you want to hear =
it
from someone else that may be new to the list that hasn't archived the la=
st
word on the issue at hand. We don't know when a doctor or a professional =
is
lurking here that has a btter explanation for things like this. Also you =
can't
evaluate fully the humans ability of survival with math and software. It =
takes
lab work and research. But they are some scary stories that rise from th=
e
soil once in awhile. You can assume only the software and information tha=
t is
current is suspect at being near a target or margin of safety.
William Edwards
Alchemy 101
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