June Perry on mon 30 sep 02
Fiery Yellow Matt C10 (note: this glaze is very low in silica, which may
contribute to the stronger color. I have revised it in a formula shown below,
upping the silica to the minimum as lister per my Insight glaze software. You
might try do a version of each and creating a third version by wet mixing
equal parts of each. This first version is very matt, with a silica/alumina
ratio in the 3+ range. The revised one below will be more of matt to semi
matt with a ratio of 6.84. The expansion is also much lower on the revised
version (maybe too low) -6.32. On the original it is 7.68
KINGMAN FELDSPAR 50 (can sub G-200 or Custer)
EPK KAOLIN 50
DOLOMITE 25
WHITING 10
BONE ASH 8
ADD: 0.7% RED IRON OXIDE, 1.4% RUTILE
Fiery Yellow Matt (revised to give minimal silica as required by Insight) C10
KINGMAN FELDSPAR 24.91
EPK KAOLIN 24.91
DOLOMITE 12.46
WHITING 4.98
BONE ASH 3.99
SILICA 28.75
ADD: 0.7% RED IRON OXIDE, 1.40 RUTILE
You can also try a version with just 2 - 3% iron, and then wet mixing half of
that with one or both of the iron/rutile versions.
You might also want to test these on both iron bearing and white bodies, or
with part of the test slipped either with white or iron bearing slip.
Regards,
June Perry
don hunt on mon 30 sep 02
June Perry wrote:
> Fiery Yellow Matt C10 (note: this glaze is very low in silica, which may
For best yellow results, fire this glaze in oxidation or close to it, reduction
only gives a ugly brown.
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