ababy sharon on sat 6 nov 99
Hi!
I tried some materials in the clay and in the glaze:
Vermiculite appears in two ways,flakes and pressed chips.I choused the
flakes, because I wanted it mainly for glazes. In the clay, at ^04 ^03
golden flakes. At ^6 small holes (melted).
In the glaze, granular, was interesting, but milling in coffee mill was too
hard."well milled" just like another material.
Here the analysis from the Ceramic Web:
VERMICULITE
SiO2 49
Al2O3 7.96
MgO 22.2
CaO 10.99
Li2O .02
I have seen works that used Vermiculite chips they were nice! at ^7 The
vermiculite did not melt and had interesting black flacks. (I was not over
impressed )
I like to add for speckles basalt granular.I couldn't test it enough because
I cannot buy it lately. At ^6 it melts, weakens the clay and drives away the
glaze. very interesting! anyway, you get the speckles already after the
bisque
Coal Ash (Rough ) melts in the clay and lives holes. In glazes
interesting, like a "dirty kaolin" I still work on it.
That all
Ababi
Message -----
From: Anji Henderson
To:
Sent: Friday, November 05, 1999 11:47
Subject: Re: grogs
> ----------------------------Original message----------------------------
>
> This reminds me of an article I read some time ago
> about adding vermiculite.. And the vermiculite adds
> little golden flecks too..But make sure those suckers
> are dry!!!
> Anji
>
> --- "Rod, Marian, and Holly Morris"
> wrote:
> > ----------------------------Original
> > message----------------------------
> > On this subject, I have added coffee grounds and tea
> > leaves (from bags) to
> > clay to open it up and lighten it up, and it works
> > fine, both as a grog to
> > help in building, and to lighten the piece. Has
> > anyone tried this to help
> > with heat shock resistance? If so, I bet you could
> > burnish over these, since
> > they are soft, especially the tea leaves.
> >
> > ----- Original Message -----
> > From: Michael Cather
> > To:
> > Sent: Wednesday, November 03, 1999 5:54 PM
> > Subject: grogs
> >
> >
> > > ----------------------------Original
> > message----------------------------
> > > hi,
> > > im a potter out here in calif.... i picked up your
> > address from an article
> > > on slip stuff
> > >
> > > im looking for recomendations for grogs to be
> > mixed with earthen ware clay
> > > (06 or less) to help withstand open pit firing ...
> > > but will not mess up the ability to burnish the
> > clay to that lovely
> > > sheen-polish .
> > > anyway...
> > > hope this message makes its way thru the telephone
> > lines or where ever it
> > > goes.
> > >
> > > thanks!
> > > Michael
> > >
> >
>
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