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In the Studio (5 posts)
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  1. In Topic: Firing Error

    Posted 5 Nov 2012

    All I could get from Trinity is that the absorbancy is going to be less than 1/%. They suggested warming the clay to no more than 200 degrees before glazing.......guess that is worth a try.

    thanks for your help.
    Pat

  2. In Topic: Firing Error

    Posted 5 Nov 2012

    View Postbciskepottery, on 04 November 2012 - 11:03 AM, said:

    Their website should provide, for each clay sold, the cone range, shrinkage, absorbency, and an MSDS. I could not find these on the Trinity website; so, you may have to call them and get the info.

    For functional ware, I prefer an absorbency of 2% of less.

  3. In Topic: Firing Error

    Posted 4 Nov 2012

    The Clay is Trinity Cone 6, though I successfully fire at cone 5.(this is based on a friend's recommendation, a full-time potter who has used this clay for many years). I don't know about the absorbancy. I presume I can find that information on their web site, where would the preference percentage be?

  4. In Topic: Firing Error

    Posted 4 Nov 2012

    View Postbciskepottery, on 04 November 2012 - 09:40 AM, said:

    No, you're not the first to have this experience nor will you be the last. Distractions happen -- even to the most experienced kiln firers. It's just clay and there is plenty more where that came.

    Sounds like the wares are overfired. What type of clay body were you using -- one that vitrifies at Cone 5/6 or higher? And, at vitrification, how absorbent is the clay -- less than 1%, 2%, 4%? That will dictate, to a large extent, whether or not you could easily and successfully glaze the items.

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