Linda Ferzoco on sat 25 sep 04
--- pdp1@EARTHLINK.NET wrote:
> Would a decent slug of say 'Texize', 'Pinesol', 'Listerine'
> or the like, not work fine?
>
>
> Phil
> el ve
Hi Phil,
I have no idea how those chemicals would affect the glaze chemistry
and doubt whether they could prevent mold formation at any reasonable
amount (meaning an amount that wouldn't stink up the glaze all by
itself). Eeeeuuuuwww! Listerine flavored Floating Blue. Pinesol
Persimmon.
CMC is carboxymethylcellulose: the key part of that word is
cellulose, that indigestible part of plants that cows ferment in one
of their several stomachs. Bugs love to eat it. So if you use CMC,
you'll have to deal with this.
I'd try Bonnie's method of dissolving CMC in very hot water to see if
that works (can't remember who posted this one first - apologies).
We need to find out what the glaze manufacturers are using. They've
done the work already.
FYI: for those of you who are dying to know more about CMC, you'll
find it has many uses.
http://www.glossary.oilfield.slb.com/Display.cfm?Term=carboxymethylcellulose
http://www.wholefoods.com/healthinfo/carboxymethyl.html
http://www.lsbu.ac.uk/water/hycmc.html
http://www.drugs.com/cons/Psyllium_Hydrophilic_Mucilloid_and_Carboxymethylcellulose.html
Linda
pdp1@EARTHLINK.NET on sat 25 sep 04
Hi Linda,
Nice call...
Would a decent slug of say 'Texize', 'Pinesol', 'Listerine'
or the like, not work fine?
Phil
el ve
----- Original Message -----
From: "Linda Ferzoco"
> This substance is sodium azinde and a very, very dangerous
chemical
> which I would use only under laboratory conditions. It
has a high
> explosive danger and is very toxic. Ingestion: bad.
Environment:
> bad. Skin contact: bad.
>
> See:
http://www.bt.cdc.gov/agent/sodiumazide/basics/facts.asp
>
> http://ptcl.chem.ox.ac.uk/MSDS/SO/sodium_azide.html
>
> Linda
>
>
> --- Bonnie Staffel wrote:
>
>
> "Depending on time, temperature, pH, gum can be attacked
by microbes
> or
> molds. If this happens store in a cooler place, make
smaller batches,
>
> adjust
> the pH to make a less friendly environment, or add an
antiseptic
> (i.e.
> NaN3). Many brush on glazes use CMC and can have a shelf
life for
> this
> reason.
Ivor and Olive Lewis on sun 26 sep 04
I think that is Sodium AZIDE. CAS No. 7782-92-5.
..."However the azides NaN3 and KN3 are well charcterised as
colouorless crystalline salts which can be melted with little
decomposition;".... "The Corresponding "B" subgroup metal azides such
as AgN3, Cu(N3)2 and Pb(N3)2 are shock sensitive and detonate readily"
(Greenwood and Earnshaw, p 417).
Best regards,
Ivor Lewis.
Redhill,
S. Australia.
Bonnie Staffel on sun 26 sep 04
About the poisonous nature of this material, remember that it was a quote
from the company, not my suggestion. I use a few drops of Clorox in my
throwing and hand washing water and that seems to take care of the mold.
However, I like the mold that is in my throwing clay.
Regards,
Bonnie Staffel
http://webpages.charter.net/bstaffel
http://www.vasefinder.com/
Potters Council member
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