Katheryn Corbin on sat 8 aug 98
Has anyone used a grolleg porcelain body at ^7? The rating is ^8 - ^10. I
am using it for dinnerware and bowls. My glazes at ^7 are suiting me so I
hate to start doing ^8.
Thanks for input and helping pre production stress.
Katheryn
http://www.axisnet.net/~corbin
gambaru on mon 10 aug 98
I would suggest that you do an absorption test of the clay body at the temp
you wish, to avoid any later problems with delayed crazing caused by less
that mature body absorbing moisture over time. A glazed piece can be given
the freezer /boiling water test. The glazed pot can be put through about a
dozen cycles in the microwave using a weak tea or coffee solution. The tea/
coffee will stain the crazing if it occurs from a fit problem or from
moisture swelling the body. MB.
-----Original Message-----
From: Katheryn Corbin
To: CLAYART@LSV.UKY.EDU
Date: Saturday, August 08, 1998 1:30 PM
Subject: Grolleg body @ ^7?
----------------------------Original message----------------------------
Has anyone used a grolleg porcelain body at ^7? The rating is ^8 - ^10. I
am using it for dinnerware and bowls. My glazes at ^7 are suiting me so I
hate to start doing ^8.
Thanks for input and helping pre production stress.
Katheryn
http://www.axisnet.net/~corbin
amy parker on tue 11 aug 98
At 01:31 PM 8/8/98 EDT, you wrote:
>----------------------------Original message----------------------------
>Has anyone used a grolleg porcelain body at ^7? The rating is ^8 - ^10. I
>am using it for dinnerware and bowls. My glazes at ^7 are suiting me so I
>hate to start doing ^8.
>Katheryn
I have used a cone 10 porcelain at 6 and it "works for me". This particular
body is from Kickwheel in Atlanta.
amy parker Lithonia, GA
amyp@sd-software.com
Tony Hansen on tue 11 aug 98
>Has anyone used a grolleg porcelain body at ^7? The rating is ^8 - ^10. I
>am using it for dinnerware and bowls. My glazes at ^7 are suiting me so I
>hate to start doing ^8.
No problem.
Just use enough feldspar to make it vitreous.
Start with 20 silica, 30 spar and 50 grolleg. Test and increase kaolin
at the expense of silica until you have zero porosity. Add microfine
bentonite to get the plasticity you want.
--
T o n y H a n s e n thansen@digitalfire.com
Don't fight the dragon alone http://digitalfire.com
Calculation/Database Software for Ceramic Industry
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