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Test Cylinder

 

While throwing this test cylinder, pull enough extra clay to the top; in order to form the catcher. This cylinder would be inverted on your wheel; with the catcher on top when you finish throwing. You can make them tall and narrow, or wide and short: whatever fits your kiln. As you get your recipe dialed in, get the peak temperature correct, and the flux levels correct: you will find little to no glaze in the catcher.

 

Nerd

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"Posted Today, 06:42 PM

"be sure you don't end up, down that burrow, knowing everything about nothing or nothing about everything! "

 

Babs:

I woke up about six months ago with exactly those thoughts. " I know a lot about clay and crystalline chemistry, and yet I know nothing."

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It's like soil science.

Chemistry tick

Then ,b. Me there's the soil, temp, weather, etc etc etc so back to "local" knowledge and there are no absolutes esp when humans are involved .

But it is fun, or at least not boring. And humbling when set against the amazingly beautiful pots made by the ancients and the "peasant potters", my term there.

Pres is now trying to replicate his new baby 😊

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Guest JBaymore

...........knowing everything about nothing or nothing about everything!

 

 

THAT is when the real journey in your field finally begins.  You are ready to begin to understand.

 

best,

 

....................john

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Yeh! Knowing that you don't know when perhaps you thought you did!

Someone said to me recently, "you're not Still reading about this stuff....."

Guess I'll never shut the books, no boredom here. And my memory is getting drifty.....sometimes I see a tiny little bit very clearly...then something else changes

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For DW  mainly, and others who fire crystalline.

cone 5 crystalline ( peak 2225f)  total holds(3.5 hours) largest crystal 3"

DW: ten years ago I began to question how much of a roll clay played in crystal development. Six years ago I started doing clay research, one year ago I started developing porcelain  specifically  for crystalline. Pulled this final test out this morning. Looks rather cone 10'ish to me, even though it is cone 5.  PR-2 porcelain. ( and no it is not for sale, nor is this an advertisement.)  think I can stop researching now

the chips on the rim are from my very poor trimming skills..still learning.

image.jpg.ada90e53a6b4287cb27bfdf18445e219.jpg

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OMG, ASDF, or whatever initials the kids use these days to say that's awesome! Have you tested the body with other glaze formulations, e.g., different frit combinations, additions of alkaline earth fluxes, and, just as important, variations of colorant?

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TY LT. Have long felt crystalline could go places, most thought not possible.

DW:  frit 3110.  50%

         A25 silica.  22%

         XL 500 ZNO. 25%

          TiO2.  0.05 %

nerd suspender.  4 %.     Lithium carb. 2.5%.   Nerd no run 0.50% 

fairly simple/ run of the mill crystalline recipe.

DW: will be testing most all the variables over the coming months. Mixed up 200 lbs.

nerd

 

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Joel:

always viewed crystalline on two planes: the first being it is an ionic bond. (magnetic bond)That said, it also means I believe that the clay body can promote or inhibit crystal growth. The second being amphoretic oxide: which I have not been able to find any supporting data at 2200 (1200C) temps and up. Although crystalline glaze is the only one I know of that can eat threw a 3" brick in a single firing. So I tend to do my experimenting along these two variables.

as a side note, the piece above was fired on the low ramp cycle: still producing large crystals. Next spring I will fire some on the high ramp cycles; which will likely produce crystals in the 4-6" range...although I must say I am very curious to see what molybdenum will do on this clay.

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