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bciskepottery

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Everything posted by bciskepottery

  1. Glaze compression. If the brush hairs were on the surface of the glaze, they would likely burn off during firing. But, they are trapped between the underglaze and your clear glaze. So, even as the hair burns out, the glaze shrinks/compresses during firing to the shape/texture of what is below it . . . Could be the brush is getting old. Check for loose brush hairs before underglazing. Check for lost hairs before applying the glaze. Or, apply the underglaze to greenware and let the bisque burn out any hairs.
  2. Actually, thanks to you . . . been around that word all my life, have even used it, but never bothered to check its meaning.
  3. hack·le /ˈhak(ə)l/ noun plural noun: hackles; noun: hackle 1. erectile hairs along the back of a dog or other animal that rise when it is angry or alarmed. 2. a long, narrow feather on the neck or saddle of a domestic rooster or other bird. 3. a steel comb for separating flax fibers. verb verb: hackle; 3rd person present: hackles; past tense: hackled; past participle: hackled; gerund or present participle: hackling 1. dress or comb with a hackle.
  4. The bias and snobbery is evident in the article title . . . warning real artists that amateurs are persons to be avoided and how to detect them. I have no problem admitting to being an amateur potter because that is what I am. No more, no less.
  5. You can hand wash clay towels in a bucket of water before putting them in the regular wash or hose them off on the patio or drive way.
  6. http://www.lagunaclay.com/support/pdf/mfelpf01_Mahavir_Feldspar.pdf
  7. “Making a Bumper-Jack Extruderâ€, Pottery Making Illustrated, Winter 1999, pages 30, 31. Also reprinted in Pottery Making Techniques, American Ceramics Society, 2004. http://www.farmpots.com/studio.htm Check David Hendley's website to see his bumper jack extruder. Could be adapted to a pneumatic one.
  8. Try NCclay club blog . . . while in western NC, they might have connections to your area. http://ncclayclub.blogspot.com/ Also, Starworks in Star, NC http://www.starworksnc.org/
  9. Likely micaceous clay found in the southwest. These links may be of interest: http://www.felipeortega.com/ https://micaceouscookware.com/
  10. Depending on how wet or dry you throw, you tend to lose the fine particles of clay in your slop. When recycling, you need to restore those fine particles or the clay becomes stiff/hard to throw -- potters use the term short to describe the clay. By adding your slop to the recycled clay (see Marcia's post), you restore fine particles and the clay keeps more of its plasticity. If you don't add back your slop, you need to add a fine clay to the recycle clay. Given Coleman is a bit pricey, save your slop and recycle your own . . . don't mix it with the others.
  11. Thank you for your reply and Joseph F's previous video link. I wasn't aware that this was a Mayco video. I have watched this particular video on several occasions very carefully (plus many others ) and I understand the concept, but at the end of this video it recommends dipping in a clear glaze hence my original question. As you say this is too simple for such a confusion so in future I will just go ahead and test. Regards from one old lady to another x In the video, they are mixing underglazes, not glazes; that is why they recommend the clear glaze. And, unless you googled the product number in one of the early slides, you would not have picked up on that . . . so much for clarity in instructions.
  12. I've seen Mea set up . . . seems more like normal speed to me. (And how many Jack Reacher mugs were consumed in making that film?) Now, how about a counterpart . . . packing up and taking down?
  13. Randy Johnston does the inverted firing . . . http://www.mckeachiejohnstonstudios.com/gallery.shtml?0001#all You can add oxides to your wadding to help flash where it makes contact with the ware. What you are likely seeing is a non-glazed interior, with just the wood ash and soda doing its thing on the surface.
  14. If you are glazing front and back, you could use kiln stilts to place the items on. Items should pop off, but you may need to grind down any pin marks left by the stilts. If the back is not glazed but sticking to the kiln shelf, you can either put kiln wash on the shelves to prevent sticking (or plucking). Even then, if the sides of your items are glazed, you may still want to use stilts.
  15. Pete Pinnell has a column in the new Spring/Summer Clay Times on "Dealing with Bubble Troubles." They are offering free access to the digital magazine through 4/15. http://www.claytimes.com/ He offers some good suggestions on dealing with the problem. Page 23.
  16. The smell and black color will burn out during firing, no affect on the usability of the clay.
  17. Paper towels are inorganic. Most likely organic matter: skin cells from the potters, sweat. Paper towels are organic. Paper is made from trees, unless of course you are talking about plastic trees , then you are right. Yep. You and Pres are correct. Which explains why I transferred out of chemistry before failing the course.
  18. Who were the potters? Or link to the work in which you are interested? Sodium silicate is one way to achieve a crackled surface, but there are others.
  19. Paper towels are inorganic. Most likely organic matter: skin cells from the potters, sweat. (Corrected)
  20. Margaret Ford did the porcelain kimonos . . . http://bid.igavelauctions.com/Bidding.taf?_function=detail&Auction_uid1=2614235 http://www.nytimes.com/1981/01/22/garden/paper-and-clay-in-sculpture-show.html https://www.google.com/search?q=margaret+ford+ceramics&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwi1_pqHr-PSAhVM3WMKHSwiBDAQsAQIKQ&biw=1600&bih=698#spf=1
  21. My plywood wedging table tops are unfinished. Sponged down at end of day. I also use unfinished plywood for ware boards.
  22. from his book . . . Clear Glaze Calcium borate frit, 65% Red clay, 35% "A clear, well fitting glaze." Clear Glaze Calcium borate frit, 25% Standard borax frit, 25% Feldspar (soda), 20% Cornish stone, 20% Whiting, 5% Zinc oxide, 5% "A reliable, clear glaze that runs pale chun blue on red clay." Clear Glaze High alkaline frit, 10% Standard borax frit, 50% Ball clay, 30% Cornish stone, 10% "A good, clear glaze." There are more . . . pages 42 - 43.
  23. Might be worthwhile to hire the person, then watch him change the elements . . . or better yet, let you help him change the elements. Also think about swapping out thermocouples and, possibly, relays. Good preventive maintenance reduces problems later on.
  24. Toki (near the bottom of the page) Standard 762 Kitchenware clay body. Cone 9. http://standardceramic.com/products/moist-clays/high-fire-clays/nggallery/page/2
  25. White gold -- fool's gold. I mostly use slaked down porcelain as a slip. Have thrown some to say I've done so. Stoneware guy, here . . . preferably dark colored clay.
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