H.L. & Joyce Rogers on fri 20 apr 01
Hi Will and all,
I fired some glaze tests on Wednesday and thought I would share
the results with the group since Alisa and others have been so kind
as to share theirs. I won't take the time to type the recipes since
they are all in the Clayart archives, but here's what I found using
KPS white stoneware, KPS Grolleg porcelain, Highwater ^5
procelain:
Edwards 1.2.3.4 Glossy Glaze Base
I tried this over textured stoneware stained with a RIO/Redart/water
stain, brushed on and wiped off with wet sponge. I love the feel of
the fired glaze and it worked beautifully with the RIO stain. I plan
to try over some underglaze stains and colored slips. This one is a
keeper. I also tried it with additions of 4% titanium,4% Mason
stain 6002, and 4% tin over stoneware. It was a mottled hare's fur
effect in pink and white, and would probably look even better on
porcelain. I also tried it with additions of 0.8% cobalt oxide and 8%
rutile on a small stoneware test bowl. It was a beautiful
blue/grey/cream mottling, with nice pooling in
the bottom of the bowl. No crazing at all so far on any of these.
I also tried the Edwards 1.2.3.4 Matte base over the same
stoneware with RIO stain. I may have gotten the glaze too thin, as
it had sort of a rough texture. I will try this one again. I also tried
this one with additions of 8% praseodymium, 4% light rutile and
1% RIO, but didn't like the result.
I tried the Edwards' Rosenrot Red (original version) over a
carved porcelain t-bowl and a stoneware bowl. The porcelain was
much nicer, with a soft greyed burgundy - (sort of like the color you
get when you mix red & green in watercolor).
The Edwards Rosenrot variation as posted by Mary Ella Yamashita
- the color was a little brighter than the original version, and this was
also over porcelain.
The Edwards' Red #3 was the best of the three I tested. I didn't
test this on porcelain, but it was really nice on the stoneware bowl,
so I expect it would look even better on porcelain.
I also tested Paul Lewing's Raspberry Base with 10% addition of
Mason Stain 6006 on porcelain, and it was beautiful with some
blue opalescence in places. On stoneware, it was flat and
uninteresting.
I fired all of this in the same load, to ^6 with a 30 minute soak, then
fired down, flipping one switch at a time until all were off. I don't
know if all that is necessary, but my glazes seem to like it better.
Joyce Rogers
Blairsville, GA
Thanks to all for sharing the glazes and info with the rest of us.
Any questions, please contact me offlist unless it's something the
whole list might benefit from.
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