Lili Krakowski on wed 19 dec 07
Llewellyn writes:
"I would like to know how I can lower the firing temperature on cone 10
glazes to cone 6. I am sure it would require a lot of
testing etc. Lets assume they are one gal of pre-mixed commercial
glazes.
I would imagine it might be some frit or other but not sure where
to start here"
You are asking two questions. The simpler first.
If you have c.10 recipes and would like similar glazes at c.6 use the
molecular formula of the c.10 as a guide, and look for a similar recipe for
c.6. This really is not hard.
If you have gallon jugs of premixed commercial glaze. I would:
1. Dry the glazes out. I do this in NEW kitty litter pans. Just let the
glaze dry. It will get dry on the outside, not the inside of the layer, so
break the stuff up, and let dry totally.
2. Weigh out whatever amount you wish of the glaze and start adding an extra
flux, in 2% increments up to 10%. See what you get.
Be aware you may get a really really runny glaze at the upper end, so put a
"biscuit" under the test tile. Frit 3110, and 3134 seem good. You can add
washed wood ash the same way. You can add calcium if you wish. And you can
experiment with neph sy.
You have a nifty job ahead of you. Just remember: your now-shiny or
transparent c.10 may turn out a matt opaque glaze if you fire it plain at
c.6. Your matt glaze may turn shiny where you add more than a little flux.
Good luck. And a holy holyday at the Abbey
Lili Krakowski
Llewellyn Kouba on thu 20 dec 07
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On the lowering of cone 10
glazes to cone 6 I want to thank all who wrote in and to Lili Krakowski
for her information on how to get started with that.=A0 It could be
interesting to see what colors and textures might result. Thanks much.>
Llewellyn Kouba
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