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Red under glaze


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#1 Tinman

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Posted 18 April 2013 - 11:58 AM

I am new to ceramics and have started working with cone 10 crystal glazes. I am trying to get red under the crystal glaze. I have tried adding copper oxide to the glaze firing it than putting it through reduction at 1700 F for 15 to bring out the red. It has not worked, I sometimes get a little pink but mostly tan. Should I try a red slip and where can I get a formula for it?

#2 gypsy

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Posted 18 April 2013 - 12:02 PM

I sure wish I could help you but you're too advanced for me....good luck finding your red!

#3 Pompots

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Posted 18 April 2013 - 12:19 PM

I am new to ceramics and have started working with cone 10 crystal glazes. I am trying to get red under the crystal glaze. I have tried adding copper oxide to the glaze firing it than putting it through reduction at 1700 F for 15 to bring out the red. It has not worked, I sometimes get a little pink but mostly tan. Should I try a red slip and where can I get a formula for it?


A good slip for greenware, 1000 g. of your clay (dried, pulverized), 700g water, 250g Bright Red (inclusion). I really don't know how this would react with the crystal glaze but for sure is a very nice red slip.

#4 perkolator

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Posted 18 April 2013 - 12:40 PM

i know some folks who have had great success using Duncan "Really Red" at ^10. try it under, on top of, or inside your glaze. only problem i have with it is you get a "crayola" red from the mason stain as opposed to a true copper red. you could add it to any slip recipe if you wanted to color it that way as well. it's all about experimentation!

#5 Iforgot

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Posted 18 April 2013 - 01:50 PM

Try using one of the really bright red stroke n' coat Mayco underglazes. I have had luck with them at ^10.



Good Luck!

Darrel
Derek VonDrehle

Raku, Pit fired, Majolica, and Stoneware ceramic artisit

#6 neilestrick

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Posted 18 April 2013 - 01:50 PM

Copper reds are very specific, touchy formulas that have to be fired just right. Just adding copper to a glaze will most likely not give you a strong red. I would start by comparing some copper red formulas to your glaze recipe to get an idea of what's needed.
Neil Estrick
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Owner, Neil Estrick Gallery, LLC
www.neilestrickgallery.com

neil@neilestrickgallery.com




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