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Lucille Oka

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About Lucille Oka

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    Advanced Member

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  • Location
    California
  • Interests
    Pottery, historical ceramics, throwing a variety of clays, testing and using commercial glazes

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  1. I have recently purchased a kiln with the same Bartlett model V6-CF controller. You can use the 'Vary Fire Mode' (on the left side of the panel) to write your own program for the bisque as well as the glaze firings. It is just one of the many features of the Bartlett V6-CF.
  2. If you are concerned about purchased, bisqued ware then, it is what it is. You must make tests and adjustments for your own finishing techniques. If you want to make food service ware your glazes must be conducive that purpose. If you decide that you need a harder bisque make it so, but testing should be done first.
  3. This is not the definitive answer by any means it is just basic. There are many books and other potters that can explain this to you much better than I. I have not made a study of quartz inversion or what else goes on in the firing. But some manufacturers andsuppliers will give you detailed info about how to fire their clays. The book ‘Clay and Glazes for the Potter’ by Daniel Rhodes updated by Robin Hopper is a good reference for this question. Cone 04 is often times the recommended bisque firing temperature of the clay supplier; they test their products and make this determinatio
  4. After my first disaster opening my kiln too soon many many years ago I learned to have a lot of patience. I fire with the top peep open but when the top temperature is reached and the firing is complete I insert the top peep so no bursts of cool air enters the kiln from doors opening and closing.
  5. The most informative 'Operating Manuals' I have ever encountered comes from Skutt Kilns. Measure your kiln if you don't already know the dimensions. Find the Skutt Kiln that comes close in dimensions and maximum firing temperature and you will find a lot of information on how to fire your kiln. http://www.skutt.com/pdf/op_manual/KS_manual/KS_OperatingManual_2002.pdf
  6. Reading your post I am wondering about the loading of the kiln. You said that you did an empty firing and it was fine. Make sure that you are not loading ware too close to the KilnSitter. Keep all ware away from the Sitter at least 2". Do not allow anything to touch any part of the mechanism; and don't allow your pyrometric cones to be too close to the Sitter as well. Finally check the pyrometric cone numbers to be sure they are correct. If you need to, get a magnifying glass to help you read the numbers.
  7. I guess I did not express myself clearly because that is absolutely correct, and I never said that there was only ONE way, because ergonomics DEALS with the makeup of the specific situation which will take into account the specific person's physiology, and the tasks being done. That is part of looking at the situation. best, ..............john No offense John, I didn't read your post. I just read the one from the original poster. I took a look at your post; the print was so small and there was a lot of it. It just hurt my eyes. I couldn't do it just now, maybe later.
  8. It is difficult to say that there must be one ergonomic way to throw; we are all different physically, a comfortable stance for me may not be comfortable for you. You must find your own best way to throw. Try different ways and discover which way feels good to you. Then get to work.
  9. Everybody finds their own position for throwing mostly it is for comfort, to help you be able to throw as long as you want. There are some potter's who throw standing. This method requires bracing arms against your body especially while centering. You have to find the most comfortable position for yourself. Steven Hill has a video where he talks about trying to find the most suitable position at which to throw. You can try out different heights but the potter's wheel must be stable as well as level. What is your brand of your wheel?
  10. Okay here is a nice little video I found on YouTube 'JanicethePotter' shows her firing results for some commercial glazes not Ancient Jasper but others. I hope it works. I hope it encourages.
  11. I hate to put a damper on this advice but if you plan to use these oils on your hands when you apply glaze or underglaze wear some surgical gloves before handling your ware. The oils that you use may affect your applications causing a resisting surface. Is your clay or working water a bit funky? I had to 'de-funk-ify' my working situation; all of the water that I use now has a small amount of bleach added to it to clean it up. All reclaiming water, throwing water, misting water, slipmaking water, thinning water, and cleaning up water, every bit of it. Soon I won't have to continue doing
  12. I did a little research and found out there are a lot of 'bucking broncos' out there, however they are under copyright ownership and have been placed on belts, plaques, statuary, jewelry and whatever else you can imagine. If I couldn't afford to have a mold made and my skills to make them were limited, I would buy the mold that will allow me to reproduce the image. I would reproduce it in clay or metal clay which has a high shrinkage level to get it to the dimensions that I need. Or use shrink pellets that can be used in the kitchen oven or toaster oven. But this requires some testing a
  13. You can try Tandy in Texas, they may have something you can use. Dick Blick has a Bronco metal tooling mold item # C62926-0019 it is 4"x 4" cost is 94 cents.
  14. For those who are concerned about their customers this information is from the FDA food code 2009-Cleanability 4-202.11 Food-Contact Surfaces. The purpose of the requirements for multiuse food-contact surfaces is to ensure that such surfaces are capable of being easily cleaned and accessible for cleaning. Food-contact surfaces that do not meet these requirements provide a potential harbor for foodborne pathogenic organisms. Surfaces which have imperfections such as cracks, chips, or pits allow microorganisms to attach and form biofilms. Once established, these biofilms can release pathoge
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