jim pendley on sat 25 sep 04
I would suggest propionic acid
to prevent fungal and bacterial growth. I have used it
in the lab to preserve cornmeal media used to raise
insects. Since it is enirely hydrocarbon it should
burn
off with no result on slip. The sodium and calcium
salts ( propionate) are also inhibitors, but the
calcium and sodium might cause changes in glaze
action,
but it is used in very small concentration. it does
have a pungent smell in the supply bottle.
If you live in hay country, you might check with a
hay farmer.If they store hay for periods of time
before
selling , propionic acid is often used to prevent the
microbial action on hay which can reduce quality and
certain molds can cause "Farmer's Lung" disease. Since
you only need a small supply maybe they can supply
you. It is much cheaper than commercial antifungals.
This is also used in some food preservation,
so there is a fairly high safety factor in its use.
Haven't tried it for slip, but if I ever get the
moldies I will :)
Jim Pendley
--- Linda Ferzoco wrote:
> --- 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
>
>
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