Dave Finkelnburg on tue 2 may 06
Heloisa,
You won't get the same results as this with lots
of spodumene, rutile and titanium dioxide unless you
make essentially the same recipe...and it will also be
underfired. :-(
Rutile is mostly titanium dioxide, so you have
about 17% TiO2 in your recipe. TiO2 is refractory to
begin with...that's what's underfired about your
glaze. I don't think you can work with that much
titanium and get it all to go into a melt. Have to
admit, though, I've never tried using so much! :-)
You could take a satin base glaze and add stains
to yield a similar color and surface. Don't know how
that would compare, or work for you.
Confining the use of this glaze to the exterior
of ware may be your only alternative.
The most inexpensive start to a glaze library is
"Clay and Glazes for the Potter," by Daniel Rhodes.
Good fundamental discussion of raw materials and
colorants. Look for the Revised Edition, published in
'73. There are errors in the 1st edition, 1957.
Sells online (Alibris, among others) for less than
$10USD plus S&H. There is a completely new edition
out, revised by Robin Hopper, for somewhat more. You
have choices!
Good potting!
Dave Finkelnburg
--- Heloisa Nunes wrote:
I love the color of this
> glaze and how it is satiny to the touch. Ron Roy
> pointed out (thanks, Ron,
> always) that it is underfired and unstable, and I
> would love to have it
> safe and sound for use with functional pottery. >
Should I try and modify it or should I use another
> base glaze and add
> spodumene, rutile and titanium trying to achieve
> similar results?
> In addition, what books do you recommend so that I
> understand better how do
> the ingredients come together to form a beautifull
> color like this.
> Dry Yellow Pumpkin
>
> 18 frit 3134
> 19 dolomite
> 24 kaolin
> 16 calcined kaolin
> 16 spodumene
> 8 flint
> ADD
> 6 rutile
> 14 titanium dioxide
>
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Heloisa Nunes on tue 2 may 06
Hello, glaze gurus, once more a glaze question. I love the color of this
glaze and how it is satiny to the touch. Ron Roy pointed out (thanks, Ron,
always) that it is underfired and unstable, and I would love to have it
safe and sound for use with functional pottery. I don't understand much of
chemistry and do not know how all the ingredients work together on this.
Should I try and modify it or should I use another base glaze and add
spodumene, rutile and titanium trying to achieve similar results?
In addition, what books do you recommend so that I understand better how do
the ingredients come together to form a beautifull color like this.
Dry Yellow Pumpkin
18 frit 3134
19 dolomite
24 kaolin
16 calcined kaolin
16 spodumene
8 flint
ADD
6 rutile
14 titanium dioxide
Thank you so much for the help ,
Cheers,
Heloisa Nunes
São Paulo, Brazil
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