Norm on fri 13 feb 98
Hey folks,
This one I got from Clayart. Just fired it and I love it. Seems to
come out best on white claybody.
APPLY HEAVILY FOR BEST RESULTS
GERSTLEY BORATE 54.88
TALC 14.63
FLINT 30.49
ADD RED IRON OXIDE 21.95%
FROM ANDREW S. LUBOW (CLAYART 9-28-96)
Norm! 8^o
Susan Ross on sun 15 feb 98
Is this a reduction or oxidation firing?
In a message dated 98-02-13 09:31:43 EST, you write:
<< Hey folks,
This one I got from Clayart. Just fired it and I love it. Seems to
come out best on white claybody.
APPLY HEAVILY FOR BEST RESULTS
GERSTLEY BORATE 54.88
TALC 14.63
FLINT 30.49
ADD RED IRON OXIDE 21.95%
FROM ANDREW S. LUBOW (CLAYART 9-28-96)
Norm! 8^o
>>
Ron Roy on mon 16 feb 98
Well I guess some of you are thinking I am going to warn about the low
expansion of this one - not so - all that Red Iron raises the expansion to
a safe level - in fact - because the B2O3 is nearly 15% (above the amount
effective for lowering expansion) I suspect this glaze will craze on some
bodies.
Beware - there is hardly any Alumina (Al2O3) in this glaze - Alumina is the
stuff that keeps glazes from sliding off pots. Because if the very low
(almost non-existent) Al2O3, the low SiO2 and the oversupply of B2O3 - this
is certainly not a durable glaze and will very likely scratch easily.
I am having a hard time thinking of this as a glaze - let me just say a
wildly unbalanced glaze at cone 6 for sure. If I add 14.5 parts of EPK it
is barely durable according to both sets of limits I use for cone 04
glazes.
On top of all that - all that red iron looks like an oversupply to me and I
suspect it is lying around on the surface waiting for something to affect
it. This would be an interesting "glaze" to do an acid and alkali tests on.
>----------------------------Original message----------------------------
>This one I got from Clayart. Just fired it and I love it. Seems to
>come out best on white claybody.
>
>APPLY HEAVILY FOR BEST RESULTS
>GERSTLEY BORATE 54.88
>TALC 14.63
>FLINT 30.49
>
>ADD RED IRON OXIDE 21.95%
Ron Roy
93 Pegasus trail
Scarborough Otario
Canada M1G 3N8
Phone: 416-439-2621
Fax: 416-438-7849
Web page: Home page http://digitalfire.com/education/people/ronroy.htm
Norm on tue 17 feb 98
Susan Ross wrote:
>
> ----------------------------Original message----------------------------
> Is this a reduction or oxidation firing?
>
> In a message dated 98-02-13 09:31:43 EST, you write:
>
> << Hey folks,
>
> This one I got from Clayart. Just fired it and I love it. Seems to
> come out best on white claybody.
>
> APPLY HEAVILY FOR BEST RESULTS
> GERSTLEY BORATE 54.88
> TALC 14.63
> FLINT 30.49
>
> ADD RED IRON OXIDE 21.95%
>
> FROM ANDREW S. LUBOW (CLAYART 9-28-96)
>
> Norm! 8^o
>
> >>
This one is Oxidation
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