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Can I Use Cone 04 Glazes On A Cone 06 Clay?


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#1 missholly

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Posted 02 May 2011 - 09:37 AM

i cant seem to find too many cone 06 glazes, so i want to try some cone 04 glazes.

and also, to what cone would i bisque to? (im used to using a cone 6 clay, so i would bisque to cone 05)

can i bisque to cone 06 then glaze to cone 04? or bisque to cone 06 and glaze to cone 06?
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#2 Natas Setiabudhi

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Posted 02 May 2011 - 10:40 AM

There must be appropriation between clay and glaze temperature. If you use high fired clay, so you must use high fire glaze too as well if you used low temperature. If you ignore those, the glaze and body failure will come, such as brittle body, crazing, shivering, etc.
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#3 Lucille Oka

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Posted 04 May 2011 - 04:51 PM

i cant seem to find too many cone 06 glazes, so i want to try some cone 04 glazes.

and also, to what cone would i bisque to? (im used to using a cone 6 clay, so i would bisque to cone 05)

can i bisque to cone 06 then glaze to cone 04? or bisque to cone 06 and glaze to cone 06?





What manufacturer's clay are you using? What do they suggest as the bisque temperature? I think testing is in order.

Cone 04 bisque firing should be ok, but I wouldn’t go lower on the bisque. It may absorb too much glaze. Using higher fired clay and lower firing glazes is a method that has been used for thousands of years.

Some colors would go fugitive at high temperatures so the colorants were mixed into lower firing glaze mediums to be used to satisfy the design. Thinking now of tomato reds in Chinese and in Islamic ware. I have done this myself with Cone 6 porcelain, a cone 04 bisque and cone 05 glazes; I had no problem with fit.

Try testing your clay at cone 04 bisque and another at cone 06 bisque apply your glaze. You must decide if you approve the results.

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#4 Chris Campbell

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Posted 30 May 2011 - 11:45 AM

You never mentioned what cone your clay is made to fire to. Is it a cone 06 clay? Or a cone 04 clay?
That is the part that matters as much as what your glaze is rated to.
Think of putting a delicate cake into a 500 degree oven cause that's when the topping melts.

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#5 missholly

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Posted 31 May 2011 - 07:17 PM

it is a cone 06 clay. ive been told that 06-04 is basically the same thing.
i think im going to try to bisque at 06, and glaze at 06.
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#6 Chris Campbell

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Posted 31 May 2011 - 10:22 PM

I thought you wanted to try 04 glazes?
If so, bisque to 06 then fire to 04.

As a general rule, you should bisque cooler than you glaze fire so the clay is open enough to hold the glaze.
There are exceptions of course, but your case does not seem to be one.

If you only fire 04 glazes to 06 they will not be fully fired and may not look right.
Some glazes do not fully melt and can stay cloudy.

Chris Campbell
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#7 missholly

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Posted 01 June 2011 - 09:30 PM

i gotcha now.
i think it was the whole bisquing lower/glazing higher temps that i wasnt sure about.

i think i got it now.

thanks so much!!
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