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dave the potter

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About dave the potter

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    North Augusta SC
  1. Not to be critical but in interest of ceramic accuracy, organic material fired in an electric kiln can cause reduction which can remove the oxidation layer on the elements and shorten the life of the elements
  2. This can reclaim scrap clay into slip with no modifications. You just don't want to put large blocks of clay in it. I have seen several suggestions about drying slip in other posts. Personally I use plaster slabs.
  3. I have to put my 2 cents worth in for rutile. It is a great colorant by itself and can modify colors and give some sparkle to glazes with other colorants.
  4. I agree, the cracks came in the cooling. Sometimes pots will crack if the have stuck to the shelf(glaze runs, glaze on the shelf, etc). The cooling shrinkage cannot happen correctly since the bottom of the pot will not move.
  5. Jane and Bill, The video was beautiful. I am so happy that the two of you are as in sync as you always seemed to be back in the days when you were doing wood and we did shows together. The pieces of your work that I own are some of my favorites around our house. The clay work is very inspiring and seems to have been the perfect next step for both of you. It was good to see you, only better if in person. Oh, and by the way, it was always Bill who would have benefited most form makeup. David Stuart
  6. I have made thousands of mugs in the last 40 odd years and nary a one pulled on the mug. Never seemed as elegant to me. Same for pitchers, jugs, jars, teapots, casseroles, etc. The buying public never seemed to have a problem with them being unattractive. I never felt my forms were diminished by my handles. I own several mugs made by other potters with the handle pulled on them and enjoy using them as well as other kinds of handle. Everyone makes their own way. Even wannabes
  7. The answer to the first question is yes if these are overglaze enamels. Question 2 I don't know the answer
  8. The adjustable regulator is used so that you can have the burner on full and still be able to adjust the flow of gas. My setup is a 100lb propane tank connected to a Ransome burner through a ball type gas valve. The gas comes through the regulator which I usually have set at 10 psi. The valve is mostly for shutting the gas flow on or off except the 1st cycle where I use the valve to turn the burner up in gradual steps. From the valve the gas goes through the orifice which is a fixed size(sorry, I don't remember the size and the kiln is not where I am but I can get that later). This sequence determines the BTU value of the burner. 500K BTU sounds like a lot for Raku but that would be a maximum output under ideal conditions so the regulator combined w/the orifice size really determine the output of the burner. I hope this is not overly detailed. I have used many different Raku kilns and burners but they all work on the same principle. I will get the orifice size for my burner so we can do the math but this weekend it is camping with the sun-in-laws and the grandchildren so it will be a few days.
  9. First get an adjustable regulator for the propane tank(try propane company, farm supply, hardware store).Add a gauge that has a 20 to 30 PSI scale. This will allow you to get more or less propane w/o having to monkey around with the orifice. Use a piece of fiber or old kiln shelf to adjust the vent (flue) where the hot gas exits at the top. Make sure there is plenty of secondary air coming in around the burner. Open the regulator until you can barely detect flame coming out the top, then turn the regulator back until the exhaust is clear. If the kiln gets hot, great! If not you can close the exit flue some.. Just remember the initial load can take considerably longer than subsequent ones. Adjusting BTU's up or down and how much flow there is should get you to a reliable firing.
  10. I have always coated the cone supports and rod with a thin layer of kiln wash to make sure nothing gets stuck. I also use bars instead of cones to get the most accurate firing.
  11. If you already have the router, you might try a router table. You can find them at most places that sell tools. You can see where you are going a lot better than using the router the conventional way.
  12. I remember a drawing teacher saying" it's not drawing what you like that's important, It's liking what you draw!" Skills are progressive but then it is not all about just skillful work.
  13. W-2 are #2 wedge bricks. They are tapered down the 9" measurement and are meant to form an arch 9" thick. Arch brick are tapered in the 4.5" direction and are used to form a 4.5" thick arch.
  14. Heavy weight all cotton canvas seems to work best. If the material has polyester in it, it will tend to strecth out when it gets wet. Unbleached cotton duck is tthe official name for what you want. Unprimed
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