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Piedmont Pottery

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About Piedmont Pottery

  • Birthday 10/19/1955

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    www.piedmontpottery.com

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  • Location
    : Fuquay-Varina, NC
  • Interests
    traditional folk pottery, crystalline glazes, pottery instruction

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  1. It’s a white stoneware clay, so not super high in iron, but I suspect there’s some. The town doesn’t report iron levels in their annual drinking water quality report, but I’ve not seen any rust staining in the toilet or sinks at the studio.
  2. The material survived the bisque firing, strongly suggesting it was not organic. It sure looks like iron oxide to me.
  3. I'll fire some chips in the bisque kiln this weekend. If it is tannins they should burn out. This is also city water, not well water, so I expect only low levels of tannins.
  4. That's a possibility, but I would expect polyphenols in water to have a net negative charge, and therefore unlikely to bind to polypropylene.
  5. That's a good point. I haven't really tested to see if it's iron or something else, but it sure looks like iron. I may try firing one of the chips of dried clay that has the material on it to see if it behaves like iron oxide.
  6. I haven't noticed this happening on other bucket types, but I have a lot of this kind of bucket, so I haven't really used many others for reclaim.
  7. For me it would be faster to just throw the plates on the wheel from the start rather than using the slab roller. However, I do find that a foot ring adds stability to plates during firing. Have you considered using a slump mold instead of throwing the slabs?
  8. If the controls are corroded you may want to look at an external computer controller. That is what I did on my old Duncan 1029. It will cost more up front but will really help with more consistent firings. You will have to drill a small hole for a thermocouple to go through. all the infinite switches are set to Hi, or bypassed altogether. I did leave the kiln sitter inline to have a failsafe option.
  9. I haven't had that problem with mine, but I've found Peter Pugger technical support to be very friendly and helpful when I've called about other issues. They should be able to offer suggestions.
  10. Will your program accept multiple log files for long firing time programs? I often have two, sometimes three log files per firing, depending on the program. Also, I'm hoping that your program will be compatible with first generation Genesis log files. I'm really looking forward to your finished product.
  11. I installed 2 mini splits in my kiln room and they work well.
  12. Are you bisque firing after the underglaze and before the transparent, or are you single firing? If you are bisque firing first, how well adhered does the underglaze appear to be before applying the transparent glaze?
  13. This is interesting, in that the calculated COE is low enough that I wouldn't expect it to craze on any of the clays I use. Regardless, my usual fix for glazes with too high an expansion coefficient is to add a bit of talc. I'd begin with maybe 250 g talc added to the amounts you listed as a starting point and go up from there.
  14. But it only takes a little bit to fix a batch of short clay, so not too bad overall.
  15. Veegum T is the magic additive I use when a batch is too short. I keep a container of hydrated Veegum T next to the pugmill so I can just add a small scoop to the pugmill if I need too. I am also very diligent in recovering as much of the fines as possible when reclaiming.
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