--- "David J. Bockman" wrote:
Respectfully, they're different. Turface is
Montmorillonite clay, Profile is
Arcillite clay. The latter is also fired hotter,
resulting in a material
that is almost a ceramic, with a lower CEC than
Turface.

Good to know the difference. To the naked eye and
even one glasses clad, they do look the same.

What does CEC mean?

S

=====
"Art does not take kindly to facts, is helpless to grapple with theories, and is killed outright by a sermon." Agnes Ropplier
(added to the above)
"How many things in life do we bludgeon with facts, render helpless
with theories, and kill with sermons? If art can help us go beyond
these patterns, we certainly need it in our lives."
Anne Wilson Schaef
From, "Women Who Do Too Much Calandar 2004."

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