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Hester

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  1. Firing By Eye?

    I have also recently fired with an old manual kiln. I bisque fired some clayheads made by schoolchildren. I had it on 1 overnight, the next morning I had it on 2 for 2 hours and then on 4,but the control only work at 1 after that on 2 or 3 or whatever I put it it just keeps on heating up until it reaches the yellow -orange stage and I had cone 04 inside on the top and bottem shelves. I had the lid 1 inch open for the first 2 hours when I went home I closed the lid but I left both peepholes open during the entire firing. When the cone dropped on the top shelf I let it soak for +_ 15 minutes then I switched it off, closed both peepholes and forget about it for about 2 days.Everything came out perfectly even one head with a cracked ear came out with its ear still in place. I was pleasantly surprised. I think the slow heating up is very important. Now I have so much confidence I want to try glaze firing !!
  2. I am a newbie to ceramics.I inherited an old Harpers toploading kiln. Model 83,5T,L,E .Power 5,7 kw current 26 Amp Max operating tenp 1280 C Serial no 09-10-89. It has 2 dials each marked to cone 6. It is working ,the other day somebody switched it on by accident.Oops ! fortunately I discovered it in time. Anyway I am an art teacher and my Grade 10 learners made some clayheads with earthenware which I want to fire.I have done a lot of research and learnt about the candling stage where the kiln must be heated slowly.It is the firing schedule thereafter that worries me.How do I make sure the temperature is taken up slowly without cracking the heads? I also have those Orton cones to check the cut off temp.I just wish there is somebody out there with previous experience to guide me.Help will be appreciated and the Grade 10.s especially will be very pleased if their teacher does not ruin their heads
  3. I am a newbie that inherited an old toploader manual kiln as a schoolteacher. The kids made some clayheads which I want to fire.I need help from somebody to tell me the speed of heating up the kiln

    1. Marcia Selsor

      Marcia Selsor

      where is the kiln. pls post your question on In the Studio. you'll get more responses. It should not be fired in the classroom without ventilation/exhaust.

    2. Hester

      Hester

      The kiln is in a separate room with lots of windows so it should'nt be a problem

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