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  1. Today
  2. Hi, thanks everyone. In answer to your questions: 1. Firing to 1240 2. Oxidation in electric kiln 3. G72150 multi-purpose stoneware transparent glaze, firing range 1200 - 1290 4a. I first used Mason Peacock 6266 at 8% (with the china clay/ ball clay slip - oh, also with a little feldspar potash, recommended by the supplier) This resulted in a very dark blue - could I rectify this by just diluting it with more of the ball/china/little bit of potash clay slip? 4b. Then I used Mason Deep Turquoise 6315 at 8% (with the more complicated slip) I was advised to add the feldspar potash and the silica by the supplier that I bought the stains from, but it resulted in a very washed out anaemic blue instead of the deep turquoise. I imagine I should just forget about the complicated slip? Am I still ok using the ball clay/china clay/little bit of potash slip with the stoneware (I have mixed up quite a bit)? Would there be any difference between using this and a slip made from the white stoneware clay? I'm after a pure colour, as shown on the Mason stains chart. Thanks again!
  3. Sorry, Just saw this post but I believe negatives are 90, so 9010. A copy of an old Bartlett manual below. You can get a fresh one from the Bartlett control site if necessary.
  4. I.m a motivated high funtioning individual I have been told.. It helps with a production pottery business as well I have found out.
  5. This happened to me once. I had overstretched an element a little, and it came drooping out on the first firing just like yours. It was still flexible enough to nudge it back into place. It looked a little wonky just like yours, but from then on it had a normal life span.
  6. thanks for the good words. I did put the elements back in the channels. Is the one I have a close up of going to be a problem since it's wonky? I did the paper test and all elements were firing. Whew! I really appreciate your help. Roberta
  7. Thanks all. Going to go out to the shop after dinner and try to maneuver them back into place. Seriously, what was I thinking?? I have changed those elements 7 times! grrrr.
  8. Just checking....the proper setting to shut the temp down 10 degrees lower is 9910, correct?
  9. If can't get into groove, pin the in a few places where they droop ..wire, right stuff of course, staples into brick work..lessens the droop into the future. Nice to read that your task won't be so onerous.
  10. Thanks Neil for the validation. I will occasionally run a Cone 5, but otherwise, simply 6. I just checked my records and on June 30th I ran cone 5. The program states 2165 F temp, and the actual was 2177 F. I didn't leave any comments on the witness cones, so I assume nothing dramatic showed, but isn't there a 30 degree window between cone differences? So I should at least measure again, but maybe offset cones for Cone 5 as well. Thanks for the input. T
  11. Yes! thanks Tyler! A chemist friend of a friend of family bounced back that it's more likely from iron. Fascinating stuff. Nevertheless, I haven't been able to recreate it under other lower temperature circumstances. Seems the 1500-1600F range is important. Also, I checked it a day after passing through the coffee filter and it's dropped out on it's own. Still at 12+pH, it's now a very clear slight yellow w/ what could be rust or Cu on the bottom. Photos below of the same jar 24 hours apart.
  12. Yesterday
  13. Jam those miscreants back into shape. My kiln has some droopers courtesy of the previous owner, they don't affect the firings so much, but they sure are ugly. I've tried torching and pinning them but they're just so noncompliant that I have given up. Luckily I have a set of brand new elements, I'm just waiting to install them. I have fired my kiln 41 times since I got it and the dang elements are still more than capable of reaching cone 6 in record time. Come on kiln, let's get along! I think Ill be replacing the thermocouple before the elements, seeing as how I had a shelf collapse last night and it bent the TC at a 90 degree angle. But it still is registering the temperature correctly too, so who knows. Kiln maintenance, the untold harrows of being a self sufficient Potter.
  14. Holy cow mark, you never stop do you? I spent this weekend building a work table / fume hood for my work with soluble salts and lustres. Sulphur, and mercaptans (thiols) are part of synthesizing a lustre overglaze and these are some of the smelliest compounds on earth. I did an open air run of some palladium mercaptan a few weeks ago and you could smell it from blocks away. I decided instead of subjecting my neighborhood to a somewhat regular barrage of rotting smells that I'd go ahead and do it proper. A 350 cu ft per minute fan pulled through an activated carbon filter rated to match. It won't get rid of the smell entirely but will trap a lot of it. At least that's the hope. This combined with an acid gas face mask will hopefully keep me better protected from hydrogen sulfide and other byproducts that are unhealthy to breathe as well. I know it's pretty janky as far as lab equipment is concerned but it actually works so I consider it a win!
  15. With L&L elements, they must be seated into the corners when you install them. They ship the elements slightly short, so that means either putting them into the corners so they're springy and under tension, or stretching them further so they lay into the corners without any tension. Personally, I prefer the latter. With new kilns they tend to hold under tension just fine, but with older kilns where everything has shifted a bit it's easier to have them lay into the corners without tension. As for your predicament, they should still be quite flexible and stretchy after only one firing, so you should be able to get them into the corners without breaking them. If you have to torch them, do so, but I don't think you'll need to. A little bending here and there with needle nose pliers, and possibly crimping the coils back together where it's drooped a lot and you should be fine.
  16. You may have to take up some slack elsewhere so judiciously anywhere you heat it red hot it will bend like butter. Some of those areas look to be out so much that if you collapsed them right at that point all the coils would then be touching. Try and find locations that are stretched a little excessively and you should be able to gain som room in these other other areas to help you put these back in without coils touching the adjacent coil. Your elements are very likely flexible enough that you can gingerly remove a foot or two to work on. Ultimately you will need enough room to shrink the sections back in with the torch. You can try heating areas of the elements that are stretched a bit more while in the channel and often these areas will shrink when you do this providing room for you to then heat the crawled areas and place them in more easily. Patience and good luck! I once put a kiln back together where nearly all the elements had crawled out nearly everywhere. It took time, but it ended up pretty perfect and is still firing today.
  17. I have a colleague who puts his scrap and trimmings in a five gallon bucket with a tad of water. When the bucket is full he pours the slurry into a canvas water bags (purchased from a supply house on the internet) to dry his recycle. Each bag holds about 60 pounds of wet clay and sits on an open slat bench. Dries in a few days to throwing stiffness (unless it rains for a few days). He slam wedges his clay just before using. Wash the bag with bleach after each batch to prevent the canvas from deterioration. The simplest system I have encountered. LT
  18. back in 1971 I was a caretaker on a religious estate.I had a pottery set up in a cabin and I mixed clay every morning in the basement of the mansion. There was an abandoned greenhouse with lots of earthenware flowerpots. I lined the pots with a little piece of newspaper over the drain hole and cheese cloth inside the whole pot. I had shelves of ware boards facing the boiler lined with these flower pots. The would dry to workable consistency in 3 days.I just kept a steady pipeline of clay coming from these flower pot. My slop was in a 50 gallon garbage can. This method makes the most plastic clay. - Slop too workable. I bought a used Peter Pugger around 1980. It was badly rusted with big chips of rust coming out in the clay. They went to stainless. Today I have an old Soldner mixer formerly belonging to Tom Coleman, then his apprentice. I got a nice de-airing Bailey pug mill at NCECA reduced as a floor model. (when I drove it back to Montana from Portland , I had it wrapped in newspaper and started the heater in my van several time at night to keep it from freezing on the way home. It was full of demo clay) you can get good deals at NCECA (National Council on Education of Ceramic Arts) the trade show. Coming to Richmond, Va march 25th to 28th of March in Richmond, Va. Great trade show is part of it. Tool vendors from all over. Marcia
  19. Thanks @Bill Kielb Yes, they are the right ones. I truly do have the best phone support. A service guy in Portland but I always have to stretch them a bit, maybe 3 inches in order to get them seated in the channels. And I am very cautious about stretching them too much. I think I erred in the other direction. Should I put the torch right on the element, then poke it in the channel??
  20. I would put them back in with a torch regardless, you are stuck. The key is to not compress them so much that the coils touch. You have only fired them once so they still should be reasonably flexible and you may be able to remove and judiciously shrink them until you can neatly get them back in. This is odd that they moved out this much so hopefully they were cut to the right length to begin with and are the right elements. Next time maybe corner pins if you are going to replace with the same. Since this is L&L with their element channels, Neil may have seen this and have an idea.
  21. Folk do it.. there are posts here.look forward to many forward bending asanas:-(( Were they the right ones for yoyr kiln. There are little "pins" you can purchase to hold the now stretched elements in place. Not a nice job Roberta. All the best. Hope Neil has a gentle on the body solution for you. Looks likec. they stretch was just as they come through the wall. Your last question.....mistakes are where learning occurs. Fast becoming my mantra
  22. Might be worth posting your firingschedule as a separate question. Lots of discussions re firing schedules forr specific effects but get the basic requirements from many books etc and read why there are differences in the ramps. i.e temp rise/hour depending on stage of firing.
  23. I wanted to name this post "oh poop" but decided against that. I changed the elements and thermocouples yesterday, then ran a fast glaze cone 5 load. The ramps and temps were spot on. I opened the lid this morning to find this. This is the first time this has happened and my husband asked "were the elements too short? Were they all seated in the channels?" I have to say, no they weren't. They were slightly extending but to my way of thinking they would have settled back into the channels. But I was wrong. So my question is, can I heat them up with a torch and poke them back in the channel?? I really don't want to purchase new elements. ugh. Next question, how long before I am no longer making stupid mistakes?????
  24. We have decided to sign up for a class.... I guess there will be a lot of trial and error on this new journey.
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