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Modifying a commercial glaze?

Is it possible to modify a commercial cone 6 glaze so it can be single fired?      I have Standard brand glazes and clay, all of it cone 6.

 

Thanks :)

 

Liz

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  • up

    Victoria Cochran

    Thanks, Maggie...didn't think.
    When doing larger/thicker (tiles and small bowls), I usually glaze at leather hard.

  • up

    John Lowes

    Hi Liz,

    I have pictures and descriptions of several pots I single fired using commercial glazes here:

    http://cone6pots.ning.com/photo/albums/single-fired-work

    It was somewhat a step into the unknown and I did not have any issues at all.  I am kind of an all in potter, but test tiles would tell you how your glazes would work in single firing.  If you have a small kiln in which to test that would be a good route; you could also use some of your smaller forms as "real world" test tiles.  I expect that Standard being a clay company may put enough clay in their glazes to mitigate shrinking issues in single firing, but perhaps they would comment to a well worded inquiry. If your tests showing crawling or such, you could try adding bentonite 1 percent and retest.

    As the discussion under the photos mentions, I glaze when bone dry, and generally pour the interiors and spray the exteriors in close succession with no problems with my clays.  How one applies plays into the success too, I suspect.

  • up

    George Lewter

    Excellent article by Steven Hill at http://ceramicartsdaily.org/wp-content/uploads/2009/02/cmjan06hill.pdf 

    It is four (or seven) years old now, but does address some of your issues.