judd cullen on tue 30 jan 07
Dear All,
I'm finding Zinc Oxide to be very exspensive, is there a substitute which has a similar effect?
I am new(ish) to glazing - been a long time! Although been a keen smoke firer and raku ceramicst for about 2 years, I now wish to create fuctional homeware and gardenware.
Any help would be fantastic - I may have a number of questions all you lovely makers could help me with!!
with kind regards
Judd Cullen
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stephani stephenson on tue 30 jan 07
Judd,
Zinc zirconium silicate is a zinc containing material
which
is sometimes useful as a substute for zinc in certain
situations.
I used it as a sub in a a particular brown glaze.
Zinc had the effect of brightening the brown tone ( it
was a mason stain/chrome brown, Zinc gave it a bit of
a orange/gold boost) it also encouraged the mottling
in the glaze. the ZZS was a nice way to introduce the
zinc with no other problems.
i was using it at 4%.
glazes are so different and zinc plays a complex
role....
so don't know if this would be useful in your
situation
you can adjust the silica and zirconium in other
materials if need be to compensate for the ZZS
stephani stephenson
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Paul Lewing on tue 30 jan 07
On Jan 30, 2007, at 3:25 AM, judd cullen wrote:
I'm finding Zinc Oxide to be very exspensive, is there a substitute
which has a similar effect?
There are other fluxes that have similar fluxing power to zinc, but
zinc has really unique reactions to some colorants, particularly
chrome. There are some colors that you can't get in a zinc base, and
others that you can't get in anything but a zinc base.
My advice to you is to forget about the cost. All glaze materials
are really cheap, except maybe a few of the colorants. The only
thing that matters is what your art looks like when it's finished-
NOTHING else matters. If a zinc glaze is exactly the look you're
looking for, use it no matter what it costs. If something else will
look exactly the same and cost less, fine. But the cost should be
the last thing you look at.
Paul Lewing
www.paullewingtile.com
Ivor and Olive Lewis on thu 1 feb 07
Dear Judd Cullen ,
What effects are you speaking of ? Zinc oxide has several functions. =
Some of them cannot be reproduced using a substitute compound..
Best regards,
Ivor Lewis.
Redhill,
South Australia.
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