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brown clay, what's the point?

updated wed 14 jul 99

 

David & Diane Chen on sun 11 jul 99

Okay I'm stumped. I received a couple of samples from Ceramic Supply of New
England. One is a pretty nice tile body (dark gray in the bag) whose bisque
color is almost white and the other is this incredibly dark brown clay that =
was
supposed to be good for slab work. I really liked working with both of =
these
and have just peeked at the bisque load of the DARK brown clay. It is a =
salmon
color with no speckles=21 I went through the archives and there was some
discussion (from Tom Buck I think, of what kind of colorant was being added =
to
produce dark brown clays. If they are adding a colorant to this clay, I =
guess
I'm wondering, why bother with it to get such a truly subtle shade =
difference?

Of course, I haven't fired these to cone 6 glaze fire yet. I was actually =
quite
concerned about how I was going to glaze that dark brown clay. Guess I =
don't
have to worry as much about that=21

Diane, in Massachusetts-glad I have a/c since the neighbors are celebrating =
a
40th birthday party in a big noisy bash kind of way with about 100 =
participants.
Can keep the doors/windows closed and keep the kiln cranked and blow those =
fumes
towards the b-day bash way=21 Okay, so I'm kind of kidding, really=21

Michael Banks on mon 12 jul 99

Actually, you will probably find that your pink bisque will actually fire
fairly dark at cone 6.

Michael Banks,
Nelson,
New Zealand


>----------------------------Original message----------------------------
>Okay I'm stumped. I received a couple of samples from Ceramic Supply of
New
>England. One is a pretty nice tile body (dark gray in the bag) whose
bisque
>color is almost white and the other is this incredibly dark brown clay that
was
>supposed to be good for slab work. I really liked working with both of
these
>and have just peeked at the bisque load of the DARK brown clay. It is a
salmon
>color with no speckles..... (snip) why bother with it to get such a truly
subtle shade difference?

>Diane, in Massachusetts-

Sharon R Pemberton on tue 13 jul 99

colored clays normally bisque in the pinkish range, maturation takes the clay
to the, usually, brown tones.