Miri Hardy on wed 28 oct 09
bee Mix 5 Clay
In addition to glaze testing, I've been testing two clay bodies for glaze=
=3D
fit, general usability (such as throw-ability) and glaze=3D20
absorption.=3D20=3D20
The two clays I've tested are both C/6 white stoneware bodies: Standard =
=3D
Clays 240 and Axner's Maccabee Mix 5 Clay (WC-
901). .
Detailed information about my experience so far with the two clays is ava=
=3D
ilable here:=3D20=3D20
http://nickandmiri.wordpress.com/2009/10/27/testing-for-water-absorbtion-=
=3D
and-clay-usability/
The reader's digest version of my findings:
I conducted water absorption tests as outlined in John Hesselberth and Ro=
=3D
n Roy's Mastering Cone 6 Glazes. I repeated the=3D20
test three times (3 different firings, different batches of clay) for eac=
=3D
h clay.
=3D20=3D20
The test results for the Axner Maccabee ranged from 1.02% to 1.77% (avera=
=3D
ge =3D3D 1.42%)
The test results for the Standard 240 ranged from 4.00% to 4.52% (average=
=3D
=3D3D 4.33%)
In their book, John Hesselberth and Ron Roy recommend confirming that wat=
=3D
er absorption for one=3D92s fired clay is no higher than=3D20
3% and preferably 1-2%. Considering my results (and some random cracking=
=3D
) I don't think I'll be ordering any more of the S-
240....
All the best,
Miri in PR
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