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clayart digest - 19 aug 2006 to 20 aug 2006 (#2006-226)

updated wed 23 aug 06


Martin Butt on mon 21 aug 06

I don't know where you got the recipe for B Mix that you posted, but it sure
isn't the one I developed, nor would it be what Laguna makes: they use my
formula, although they use different brands of kaolin and ball clay.
Could you be referring to Bee Mix, developed by Tom Coleman? I don't know
his recipe, but I have heard it has a fair amount of PV clay (could be true, or
not, who knows?).
Martin Butt
Coyote Clay & Color

In a message dated 8/20/2006 10:20:29 P.M. Mountain Standard Time,

Date: Sat, 19 Aug 2006 19:57:55 -0700
From: Tony Ferguson
Subject: Re: About clay bodies: long, probably boring


B mix is a porcelainous stoneware--more on the stoneware side I suppose. It
is not a porcelain by definition of what's in it:

Old Hickory #5 50
EPK Kaolin 20
PV Clay 28
Talc 2

S cracking has to do with compression in my opinion as witnessed in throwing
off the hump or other method and not compressing the bottom well enough.

Tony Ferguson

Brad Carter wrote:
Lili's discussion of clay bodies and Lynn Goodman's question about sagging
porcelain platters have brought to mind questions I have on B-Mix. I
understand B-mix is a porcelainious clay. But how similar is it to
porcelain? Is
B-Mix a hgigh-talc clay? Mel recently wrote that high-talc clays have a
tendency to S-crack. Is porcelain a high-talc clay? If so, does it also
have the tendency to S-crack? Thanks to anyone who can shed some light on
all this?

Brad Carter