mel jacobson on sat 10 sep 11
Hi
I'm having a problem with Ron Roy's Black magic cone 10 glaze, I can't prod=
uce the nice dark black/brown finish every time, one time its rust red the =
other its the nice glossy black. Doesn't matter where in the kiln it is. I =
fire Cone 10 reduction in a HF 24 updraft kiln. My glaze 1.50 sp., well mix=
ed and I dip for 6 seconds. Any ideas or help would be very much appreciate=
d.
Bryan Hannis
from: minnetonka, mn
website: http://www.visi.com/~melpots/
clayart link: http://www.visi.com/~melpots/clayart.html
Ron Roy on sun 11 sep 11
Hi Bryan,
Application is crucial - too thin and you get the red - too thick and
you don't get the nice breaking to red.
Could also be cooling time - is there a big variation there.
Keep in mind that thin ware will get soaked when glazed on the inside
and not be absorbent enough to get a proper coat on the outside.
Is your glaze deflocculated?
Is it related to uneven bisquing?
RR
Quoting mel jacobson :
> Hi
>
> I'm having a problem with Ron Roy's Black magic cone 10 glaze, I
> can't produce the nice dark black/brown finish every time, one time
> its rust red the other its the nice glossy black. Doesn't matter
> where in the kiln it is. I fire Cone 10 reduction in a HF 24 updraft
> kiln. My glaze 1.50 sp., well mixed and I dip for 6 seconds. Any
> ideas or help would be very much appreciated.
>
> Bryan Hannis
>
>
>
> from: minnetonka, mn
> website: http://www.visi.com/~melpots/
> clayart link: http://www.visi.com/~melpots/clayart.html
>
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