Bob Johnson on sat 6 jan 07
Thanks to those who advised me on ways to modify my local black clay
for use as a slip glaze: The problem was cracking and peeling off the bisque.
Most responses suggested that I calcine the clay. That would have
been problematic, however, because I don't have a ball mill to break
it up again. What worked was even simpler: I just sprayed it
on---which removed enough of the moisture to prevent the cracking and peeling.
The resulting glaze was not spectacular: a dull olive-green,
characteristic of a basalt mud, I think. Nevertheless, its a place to
start. My goal is to develop something interesting, using mainly
local materials, so my next step will be to add some wood ash to the mix.
Bob
sacredclay on sun 7 jan 07
-Please keep us posted about the wood ash project, becasue I'm doing
something similiar along the line. I think it's really exciting and
exhillerating to explore these elemnts. Best of luck! Kathryn in NC --
David Beumee on mon 8 jan 07
I missed the discussion, but having just collected some Katrina clay in New Orleans, adding 70% ball clay proved very successful in keeping the local slip from peeling off leather hard ware.
David Beumee
www.davidbeumee.com
Lafayette, CO
-------------- Original message ----------------------
From: Bob Johnson
> Thanks to those who advised me on ways to modify my local black clay
> for use as a slip glaze: The problem was cracking and peeling off the bisque.
>
> Most responses suggested that I calcine the clay. That would have
> been problematic, however, because I don't have a ball mill to break
> it up again. What worked was even simpler: I just sprayed it
> on---which removed enough of the moisture to prevent the cracking and peeling.
>
> The resulting glaze was not spectacular: a dull olive-green,
> characteristic of a basalt mud, I think. Nevertheless, its a place to
> start. My goal is to develop something interesting, using mainly
> local materials, so my next step will be to add some wood ash to the mix.
>
> Bob
>
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