Thank you for sharing. This is good to have. Donna

"Bruce Glassford" wrote in message
...
Haven't tried Miller 510, but I did do some testing of various (mostly
Laguna) ^10 stoneware at^6. Basically, all of them came out in the 4-5%
porous range, compared to the^6 clays I was also testing which came out in
the 0-3% .

Campbells Warm Brown (^6): 13.5% shrinkage, 0% porous (my scale isn't good
enough to tell)
Campbells Red Brick - same as the warm brown
Little Loafer (Highwater ^6): 14% shrinkage, 2.7% porous

Laguna B10: 12% shrinkage 5% porous
Soldate 60: 17%, 4.5%
Los Altos: 15%, 3.5% porous
Std 153: 15%, 3.1% porous (^4-10, per Standard...)
Std 257: 14%, 0% (Supposed to be ^8 porcelain)

DKat wrote:
Yes, I was being lazy and hoping someone else had done the work for me.
This clay seems very different to me than highfire stoneware I used to
work with - my guess is that it has a huge amount of talc in it... I
should do the work and test it myself - I would just much rather spend my
very limited time throwing what I want rather than waiting. I had not
thought of it for ovenware - the body seems way too tight for that but I
could do some little custard dishes and work out from there... yep, that
could be a fun way to go. Thanks for the input. Donna


"Bob Masta" wrote in message
...
On Thu, 6 Mar 2008 10:50:26 -0500, "DKat"
wrote:

I am reposting this from clayart. I know our room is small but I'm
hoping
this might get more notice here since it has gotten none in clayart.


I have some 510 (miller) which I got from another potter who did not
like
the way it felt (seems fine for me in that regard). They said that it
was
a clay suitable for cone 6 stoneware, pit and raku however the only
information I can find on it has the clay as cone 10 or at most a range
from cone 8 to cone 10. Has anyone worked with this clay in the cone 6
range? I'm thinking I will probably have to just store whatever I make
with it until I can rent a kiln for high fire but I thought I would
just
ask. Donna

Never hear of it. But you could easily make up a few test bars and
throw them in with your next set of bisque and glaze firings to cone
6. You will have to decide for yourself if they are vitrified enough.
You could compare them to identical bars made from your regular
cone 6 body, just for a reference point. Do absorption tests,
which everyone uses as a benchmark. If they don't absorb
excessively (say, under a few percent), you are probably OK.
You can then use the clay normally to make a few mugs, and try
microwave tests to see if that's going to be a problem.

But people use low-fire for all kinds of stuff, including mugs,
so it's really a judgement call. If your clay still has high
absorption at cone 6, and you are nervous about functional
uses, just save it for non-functional. Actually, it might even
make good ovenware, if you want to do the testing.

Best regards,



Bob Masta

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