The same crystalline recipe & batch was applied to three different porcelain clay bodies with various levels of oxides. The resulting changes in glaze appearance was produced by the clay, not the glaze.

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Comment by Tom Anderson on September 1, 2017 at 4:17pm
Josi:
The one on the left has the most oxide additions. It turned the usual hi- gloss/ hi-opacity of crystalline to matte. The one in the middle, I was going for translucency: but not thin enough. Always thought crystals would pop more on highly translucent pieces.
Tom
Comment by josi rica on September 1, 2017 at 11:40am

Very interesting to see the various colors just on simple different clay

Is it the one of the center which contains most oxide?

Comment by Tom Anderson on August 29, 2017 at 8:45pm
Norm: just realized I misread your post. (Reaches for glasses.)
I have a PP VPM 20 I use to mix colored porcelains because it is the easiest and quickest to clean. Will have a Bailey VPX 125 in here shortly for production (400lbs) an hour mix rate.) looking at some open mill augers that mix 1000-3000 lbs at a time. See where it hoes and how it grows.

Tom
Comment by Tom Anderson on August 29, 2017 at 6:34pm
Forgot to mention: my speciality clay line has been picked up by a couple of local suppliers. Sometime in October cone 04 porcelain and colored porcelain will come out. Then cone 6 colored and speciality porcelain in November: if my schedule holds.
Comment by Tom Anderson on August 29, 2017 at 6:31pm
Norm:
No, never worked for any clay companies. Been studying clay formulation and chemistry for years. Have several formulation articles coming out in Ceramics Monthly over the next several months. Studied with Ron Roy on and off: the man who taught Tony in part. Been working on clay formula limits, formulation criteria, and SAS theorem.
I have seen Tony's 03 formula: he is a big fan of V- Gum,whereas I am not. I talk to Tony on rare occasions via email.
Tom
Comment by Norm Stuart on August 29, 2017 at 11:53am

What do you use to mix clay?

The only time I've mixed clay, Tony Hansen's Cone 03 porcelain, I added enough water so I could use a cake mixer, then hung it up in cloth to dewater.

Comment by Tom Anderson on August 28, 2017 at 9:09am

I mixed clay all weekend: all cone six except for a special order of cone 11 porcelain.

100 lbs of standard porcelain, 100 lbs of 0% absorption stoneware, 100 lbs of Redstone, and a two different colored porcelains. This coming week I am going to make some clay for me... special crystalline porcelain.

Tom

Comment by Joseph Fireborn on August 28, 2017 at 8:10am

They are all very nice!

Comment by Tom Anderson on August 23, 2017 at 4:56pm
Joseph:
The one on the left ended up being matte, which I found unique for crystalline. The one on the right is common, so not much surprise there. The one in the middle was the one I was hanging my hopes on: translucent body. Did not get it thin enough to really produce that effect, it has some degree, but very little.
Tom
Comment by Joseph Fireborn on August 23, 2017 at 9:32am

Which was your favorite? 

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