Klyf Brown on mon 1 oct 01
Jeff, for killing mold in wet places I use a hand held spray bottle filled
with chlorine bleach, one to one up to three to one (three water) for
lighter mold.
What concerns me is your Green wood. Most wood products that I
know of are "treated" wood that is supposed to resist termites and
other nasty attackers of wood products in homebuilding and exterior
landscape applications (sand boxes, retaining walls, garden or
sidewalk edging, etc.).
These wood products are treated with CCA. I am not sure of the
exact ingredients, but I think it is Cupuric Cadmium (sp?) Arsenide.
All highly toxic, and despite the manufacturers claims to the contrary,
the toxins will leach out with moisture.
If this is treaded wood it is leaching into your pots, your throwing slip,
your hands as they come into contact with all the above. When you
fire, these toxins are bound to be released into the air.
Do Not Dispose of treated wood by burning it. You and/or your
neighbors can be killed by breathing the resultant toxic fumes emitted
by the CCAs as they burn.
I advise all who read this post to never use this green coloured wood
for anything. It poisons everything it comes in contact with.
I expect a SLAP suit any minute now.
Klyf Brown in New Mexico
10/1/01 3:44:54 AM, van den Broeck Jeff
wrote:
>We have had a very wet rainy season. What else can you expect?
But the
>cooler temperature made it an ideal climate for mold growing. In the
house
>we try to fight or prevent the molds with dehumidifiers. The pottery
is
>another cup of tea.
>A lot of wet things hanging around and the place is not so easy to
>dehumidify. To give you an idea about he humidity in potter's terms:
it
>takes two to three weeks for pots I throw to stiffen up for turning.
Three
>or four more weeks for the bisquit firing. I'll have to build a
ventilated
>and heated area for drying for the next rainy season.
>Some of my bats grow overnight white mildew-like cotton. After
some days it
>becomes a black dusty mold. Till now I washed the bats and other
places
>with a product that pretends to kill molds, but of course it leaves the
>bats wet. They perhaps do, but don't prevent a new harvest the next
week.
>The rapid growth scares me a bit and the day I started a little cough
in
>the pottery, I was alarmed.
>Perhaps I have also to mention that the molds grow by preference
on my bats
>made from some greenish compressed board, that is so-called
waterproof. I
>never experienced this anything like this before. Perhaps it took the
bats
>a while to get humid, because they are supposed to be 'waterproof".
>Could I call for the attention and if possible the help of people who
are
>familiar with the fungus growth and the hygiene in the workplace. (I
read
>time ago that a hospital had to be closed for a period, because they
had
>discovered molds in the air con system blowing air in the surgery
room.)
>I read some months ago several messages about molds, fungus but
didn't
>read anything that would help solve my problem or did I miss it? Is
there a
>remedy that is not as bad as molds? I was thinking of burning or
heating
>the surfaces attacked by molds with a gas torch. The other products
are
>washed on or off with water, what makes the bats and shelves wet
and the
>cycle starts again.
>Help and suggestions would be very much appreciated.
>
>Jeff van den Broeck
>P.O.Box 1099, Baguio City 2600
>Philippines
>jvdb@skyinet.net
>
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Des Howard on tue 2 oct 01
Klyf
The "green wood" you refer to, if it is the same as we use, is treated with
a copper chromium arsenical compound as an anti-fungal/anti-white ant agent.
Sounds deadly, prolly is, but, as far as I know, only to the little buggers that
chew on just about all building timbers around here.
Any scraps or sawdust are definitely not for burning or for putting into our garden
biomass.
As an inveterate recyclers our workshop interior walls were made
of building materials from demolition sites, wide Baltic Pine planks,
Oregon (Douglas Fir?) studs, eucalyptus sp. plates...chomp! chomp!
just a paint layer left. Walls are now CCA treated timber & fibre/cement sheeting.
Neighbour built concrete slab on ground, steel framing,
untreated timber trusses & cupboards...chomp! chomp!
time to rebuild 2 rooms & a kitchen. Other stories, but two will do.
Regards
Des
ps Adventure playground in our local school is made from CCA
treated round pine poles, I guess the parents who financed
& built it & the NSW Education Dept who authorised it
must not be too worried about any potential problems.
D
Klyf Brown wrote:
> What concerns me is your Green wood. Most wood products that I
> know of are "treated" wood that is supposed to resist termites and
> other nasty attackers of wood products in homebuilding and exterior
> landscape applications (sand boxes, retaining walls, garden or
> sidewalk edging, etc.).
> These wood products are treated with CCA. I am not sure of the
> exact ingredients, but I think it is Cupuric Cadmium (sp?) Arsenide.
> All highly toxic, and despite the manufacturers claims to the contrary,
> the toxins will leach out with moisture.
> If this is treaded wood it is leaching into your pots, your throwing slip,
> your hands as they come into contact with all the above. When you
> fire, these toxins are bound to be released into the air.
> Do Not Dispose of treated wood by burning it. You and/or your
> neighbors can be killed by breathing the resultant toxic fumes emitted
> by the CCAs as they burn.
> I advise all who read this post to never use this green coloured wood
> for anything. It poisons everything it comes in contact with.
--
Des & Jan Howard
Lue Pottery
LUE NSW 2850
Australia
Ph/Fax 02 6373 6419
http://www.luepottery.hwy.com.au
Edouard Bastarache on tue 2 oct 01
Hello Klyf,
cadmium is not involved in wood preservation.
CCA in french is" Arsenate de cuivre chrom=E9 or chromat=E9"
that I would translate by "Chromated Copper Arsenate"
Later,
Edouard Bastarache
Irreductible Quebecois
Indomitable Quebeker
Sorel-Tracy
Quebec
edouardb@sorel-tracy.qc.ca
http://sorel-tracy.qc.ca/~edouardb/
http://www.absolutearts.com/portfolios/e/edouardb/
" These wood products are treated with CCA. I am not sure of the
exact ingredients, but I think it is Cupuric Cadmium (sp?) Arsenide.
Klyf Brown in New Mexico"
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