Leland G. Hall on thu 22 aug 02
I used to know a guy that dumped copper carb right into his clay mixer.
Pit fired the pots. He made his living at this. That's a lot of skin
contact with copper carb, throwing five days a week. He was very careful
about dust, (I was his assistant--read mop boy) but I'm wondering if that
much skin contact with copper carb is hazardous to ones health, as I am
thinking about trying this my self. I have heard of those that do a copper
solution wash on bisque. Would there be any difference in effect? Sure
would be less contact. Thanks in advance for any coments.
Regards
Leland Hall
Before The Wheel
Edouard Bastarache on fri 23 aug 02
Hello Leland,
Occupational dermatoses are not a major problem in the pottery industry,
the incidence being less than 1%.
Here are some causes found in the pertaining medical literature:
-Antimony trioxide
-1,2 benzisothiazoline-3-one in releasing oils
-Biocides
-Cadmium chloride
-Ceramic fibres
-Chloracetamide
-Chromium and chromates
-Cobalt
-Cobalt chloride
-Cobalt nitrate
-Formaldehyde
-Maleic anhydride
-Manganese dioxide
-Mercaptobenzothiazole
-Natural rubber latex
-Nickel
-Nickel sulfate
-Proxel
-Red copper oxide
-Red iron oxide
-Releasing oils
-Resins
-Sodium tripolyphosphate
-Turpentine
-Vanadium pentoxide
But let us bear in mind that studio pottery may be quite different from t=
he
pottery industry
when it comes to chemicals and processes used.
As you may see copper carbonate is not among the materials that caused
dermatoses
in the potter industry but, it is copper salt and copper salts are irrita=
nts
to the skin, eyes,and mucous membranes.
Also, our governmental toxicologists recommend to avoid any skin contact
with copper carbonate:
http://www.reptox.csst.qc.ca/Produit.asp?no_produit=3D9878&nom=3DCopper+c=
arbonat
e
"Manipulation (Handling):
=C9viter tout contact avec la peau (Avoid any skin contact). "
Too bad this toxicology database is in french only.
This friend of yours was lucky not to suffer from occupational dermatosis=
,
or maybe toxicologists
are not being reasonable when it comes to the use of this material as it =
is
not listed among the usual causes of dermatoses among pottery industry
workers in Oshline/Nioshtic Database.
I certainly will not refrain from using it in some of my glazes.
So, make your choice.
Later,
Edouard Bastarache
Irreductible Quebecois
Indomitable Quebeker
Sorel-Tracy
Quebec
edouardb@sorel-tracy.qc.ca
http://sorel-tracy.qc.ca/~edouardb/
http://perso.wanadoo.fr/smart2000/index.htm
References :
1-Oshline/Nioshtic, database provided by The Canadian Centre for
Occupational Health and Safety.
2-CSST(Quebec) - Service du r=E9pertoire toxicologique.
----- Original Message -----
From: Leland G. Hall
To:
Sent: Thursday, August 22, 2002 10:12 PM
Subject: copper carb in clay body
> I used to know a guy that dumped copper carb right into his clay mixer.
> Pit fired the pots. He made his living at this. That's a lot of skin
> contact with copper carb, throwing five days a week. He was very caref=
ul
> about dust, (I was his assistant--read mop boy) but I'm wondering if th=
at
> much skin contact with copper carb is hazardous to ones health, as I am
> thinking about trying this my self. I have heard of those that do a cop=
per
> solution wash on bisque. Would there be any difference in effect? Sure
> would be less contact. Thanks in advance for any coments.
>
> Regards
> Leland Hall
> Before The Wheel
>
>
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