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Don Kopyscinski

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  1. I have great luck with Aftosa's wax resist. It's by far the best cold wax resist I've used. As others have mentioned it also needs to dry thoroughly to works it's best ( I usually wait a few hours ). Rather than struggle with an inferior product, treat yourself to some. Don Kopyscinski Bear Hills Pottery Newtown, CT
  2. John, I was with you till I read: <<The high elastic modulus and hardness are attributed to both the large cationic field strength of Ta5+ ions and the large dissociation energies per unit volume of Al2O3 and Ta2O5.>> It reminds me of the time I tried to read "Introductiin to Ceramics" - by W. David Kingery straight through. ( the only ceramic text I ever exchanged because I was in a bit over my head ). I'm glad someone knows this stuff, but it does get deep rather quickly. Cheers, Don Kopyscinski
  3. John, Your post reminded me of this picture. Cheers, Don Kopyscinski Bear Hills Pottery Newtown, CT
  4. In reality, the plasticity of clay may be improved by mixing it to a slurry under continuous, vitreous, agitation first. The clay can then be allowed to stiffen to a working consistently, ( "filter pressed" in industry). This not only will this thoroughly blend the clay you are testing, it will fully wet the clay particles, yielding greater lubricity, thus maximizing the clay's plasticity. It may turn out that the clay is not fully workable as it stands, but it maximizes that particular clay's forming potential.
  5. I can tell you what not to do. Years ago, I was doing all kinds of experiments in the studio. I though that I may be able to increase the plasticity of the clay I was using. I tried several additives to my clay body. I had read that the addition of organic material to the clay could help it to age better. I read somewhere that if one adds "compost starter to the clay, it will promote the aging process. So I mixed it with water and sprinkled it evenly throughout a 10 gallon bucket of clay. I covered it, and left it alone to brew for about a month in the summer. When I decided to try it out one day, I was in for a surprise. On opening the bucket, I was struck by the most foul smelling, pungent, "bucket of vomit" type smell that I'll never forget it. I imagine that the plasticity of that clay was greatly improved. I had grown something in the clay, and I swear it had a heartbeat. The smell was unbearable, and the whole pail had to be disposed of in the great outdoors, as I held my breath. It seems that my experiment worked a little "too well". It was a valuable learning experience.
  6. Best advice: ALWAYS test a sample of your latest clay delivery before diving in and making a ton of pots with it. The same should be said for each new batch of glaze you make. This small precaution can save you a lot of work and money over time. Don Kopyscinski Bear Hills Pottery
  7. <<I have yet to see ANY really controlled scientific type study work done in this or anything else relative to the astounding claims for ITC performance. All of the evidence that I have ever seen is anecdotal. I personally have used this stuff on numeropus installations for various purposes, and can say some general things about the material's performane, but as to scientific accuracy of those statements, or anyone else's comments, I cannot give anything with any solid science behind it. Until there is some serious data and independent 3rd party analysis published by someone.... I'd say take all such recommendations with a grain of salt.>> .................john Hi John, I came upon your post while web surfing last night. Several years ago I did my own experiment with ITC100. I don't claim the results to be the definitive answer, but this is what I came up with. http://www.potters.org/subject13066.htm Don Kopyscinski Bear Hills Pottery donkopy@aol.com
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