Lili Krakowski on mon 21 mar 05
Nancy. I am confused about what is wrong, and what you are asking. =
Sorry.
You are mixing Mason Stain 6304 with Epk, Silica and a frit, The 05/06 =
glaze turns yellow. Is that right so far?
At cone 6 your glaze--a different glaze-- shows the desired purple. And =
your 06/06 glaze behaves properly with OTHER colorants.
Is that what the problem is? That you are not getting the purple you =
want shining/showing through your 05/06 glaze?
6304 contains chrome and tin, says the catalog. The catalog also says: =
no zinc, and 6.7%-8.4% calcium oxide (12%-15% CaC03.
I assume you have met those requirements. So what can the matter be? =
I can only guess, and my guess is, immaturity. That the chrome and tin =
are not being dissolved enough into the glaze. That the glaze picks up =
some of the chrome but does not really interact. Suggestions: Make =
some tests upping the frit in your underglaze mix. Up it just a little =
at a time. Maybe 2% at a time. See what happens. Use 3124 or 3134 =
which are high in calcium. Or change your covering glaze to one that is =
a bit more active at c.05/06. I would go with more frit in the =
underglaze mix first.=20
Lili Krakowski
Be of good courage
Nancy Sowder on sat 26 mar 05
Thanks Lili,
Yep, you have the problem correct. I will certainly try increasing the
frit and I will let you know if it works.
Thanks again,
Nancy
On Mon, 21 Mar 2005 19:57:43 -0500, Lili Krakowski
wrote:
>Nancy. I am confused about what is wrong, and what you are asking.
Sorry.
>
>You are mixing Mason Stain 6304 with Epk, Silica and a frit, The 05/06
glaze turns yellow. Is that right so far?
>
>At cone 6 your glaze--a different glaze-- shows the desired purple. And
your 06/06 glaze behaves properly with OTHER colorants.
>
>Is that what the problem is? That you are not getting the purple you
want shining/showing through your 05/06 glaze?
>
>6304 contains chrome and tin, says the catalog. The catalog also says:
no zinc, and 6.7%-8.4% calcium oxide (12%-15% CaC03.
>
>I assume you have met those requirements. So what can the matter be?
I can only guess, and my guess is, immaturity. That the chrome and tin
are not being dissolved enough into the glaze. That the glaze picks up
some of the chrome but does not really interact. Suggestions: Make some
tests upping the frit in your underglaze mix. Up it just a little at a
time. Maybe 2% at a time. See what happens. Use 3124 or 3134 which are
high in calcium. Or change your covering glaze to one that is a bit more
active at c.05/06. I would go with more frit in the underglaze mix first.
>
>
>Lili Krakowski
>
>Be of good courage
>
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