Schapansky on fri 8 jan 99
Hi=3B
How would I get the following glaze to mature at a lower temp. while
retaining its look at cone 6?
I'm hoping to get it to mature at cone 5.
Potash Feldspar 40
E.P.K 15
Frit 3124 35
Dolomite 10
Superpax 8
with additions of 1.75 copper carb.
1.25 rutile
or 4=25 copper carb.
I could start over with a base glaze that is made for lower temperatures, =
but I
like the look of this glaze, just can't get my old kiln to perform like it =
used
to.
TIA
Elizabeth
David Hewitt on mon 11 jan 99
I remember David Frith recounting how, when there was a campaign to save
energy usage, and he decided to try and reduce the firing of his glazes
by 1 or 2 cones without altering their nature, that he found the answer
by ball milling the dry glaze mix for several hours. I imagine the
theory was that the smaller particle size was more active and the glaze
fluxed more.
I have never tried this myself, but I don't doubt that it worked for
David Frith.
David
In message , Schapansky writes
>----------------------------Original message----------------------------
>Hi=3B
> How would I get the following glaze to mature at a lower temp. while
>retaining its look at cone 6?
> I'm hoping to get it to mature at cone 5.
>
>Potash Feldspar 40
>E.P.K 15
>Frit 3124 35
>Dolomite 10
>Superpax 8
>
>with additions of 1.75 copper carb.
> 1.25 rutile
>
>or 4=25 copper carb.
>
>I could start over with a base glaze that is made for lower temperatures, =
>but I
>like the look of this glaze, just can't get my old kiln to perform like it =
>used
>to.
>
>TIA
>Elizabeth
>
--
David Hewitt
David Hewitt Pottery ,
7 Fairfield Road, Caerleon, Newport,
South Wales, NP6 1DQ, UK. Tel:- +44 (0) 1633 420647
FAX:- +44 (0) 870 1617274
Own Web site http://www.dhpot.demon.co.uk
IMC Web site http://digitalfire.com/education/people/hewitt.htm
Dai Scott on wed 13 jan 99
If you only want to go one cone lower, have you tried just firing the same
glaze to cone 5? I was having trouble with some bloating with my clay, so
dropped the glaze firings one cone, with my original glaze, and it came out
looking just the same. Some glazes will perform nicely over a range of two
or three cones. Others are really picky about being exactly the right
temperature. Good luck!
Dai Scott - Kelowna, B.C. with no snow---something about the "Pineapple
Express".......
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