Pat Southwood on tue 31 oct 06
Hiya Peeps,
The subject line pretty much sums up my request.
Does anyone have a stoneware glaze (ox or red'n)
that has the same surface qualities as a barium glaze , but is more =
acceptable to the environmentally friendly student ?
I can't come up with anything, so I thought I should ask you lot down =
the pub.
Ta.
pat southwood
pat@southwood4.fsnet.co.uk
Daniel Semler on tue 31 oct 06
Hi Pat,
The are a bunch of barium containing glazes ranging from dry mattes
through to high gloss. In many cases the surface gloss and feel can
be reproduced without the barium. In other cases its much harder. I am
thinking by surface quality you are principally referring to the feel
of the glaze. Is that what you mean ? Do you have a specific barium
containing glaze that you wish to emulate ? If so I'd be happy to look
at the recipe and suggest something. You could send it to me on or off
list. Otherwise could you describe more precisely the particular
surface qualities you are trying to produce ?
thanx
Daniel
Snail Scott on wed 1 nov 06
At 10:46 PM 10/31/2006 -0000, Pat S. wrote:
>Does anyone have a stoneware glaze (ox or red'n)
>that has the same surface qualities as a barium glaze...
The effect that barium has on copper is
pretty unique, and you won't get that
'wowie' turquoise by other means. For more
understated color effects, though, it's
common to substitute strontium carbonate
for the barium.
Try the archives using the word 'strontium'
and you will get lots of recipes of this
type. Choose a base, and experiment with
different colorants.
Strontium carbonate is much less toxic to
the user, both in raw form and in the final
glaze. It has almost no health risks.
-Snail
Ron Roy on thu 2 nov 06
Hi Pat,
Strontium oxide is the closest - send me the recipe and I'll convert it for
you - it's easy - 3/4 the amount of Strontium will do the same as the
original barium. If there is 20 barium then use 15 Strontium. The sub will
lower expansion at the same time.
Colurs from copper and barium will change - but colours from iron will
look better at least to me.
RR
>The subject line pretty much sums up my request.
>
>Does anyone have a stoneware glaze (ox or red'n)
>that has the same surface qualities as a barium glaze , but is more
>acceptable to the environmentally friendly student ?
>
>I can't come up with anything, so I thought I should ask you lot down the pub.
>
>Ta.
>pat southwood
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
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