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Posted by DKat on March 11, 2008, 1:10 pm
Please log in for more thread options Thank you for sharing. This is good to have. Donna
> 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
>>
>>
>>> 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
>>>
>>> DAQARTA v3.50
>>> Data AcQuisition And Real-Time Analysis
>>> www.daqarta.com
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>>
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