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Callum Donovan-Grujicich

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About Callum Donovan-Grujicich

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  1. When I say slow, I just mean slow for a ceramic fibre kiln. So something like six to eight hours of the heat being on.
  2. I was thinking of maybe using a large steel tank insulated with ceramic fibre blanket. The whole kiln would be raised like a large top hat kiln. I don’t know many details yet as I still have a lot of things to research. From what I have heard, kilns insulated with ceramic fibre blankets heat up and cool down very quickly. I wouldn’t want to use soft bricks because they are very expensive. My concern is that the porcelain would crack from thermal shock. Is there a way to fire this type of kiln slowly? Or is it actually okay to bisque fire thin porcelain quickly?
  3. I would like to make a large (4.5ft tall) sculpture out of cone 6 porcelain, but I have a problem. I cannot find anywhere that would fire such a large sculpture in one piece. I have seen artists wrap large sculptures in fibre blankets or custom raku-style kilns to fire them. Is a slow-firing and slow-cooling version of this method possible (using propane as fuel) with fibre blankets and up to cone 6 bisque for porcelain? The clay would be relatively thin (about 1cm thick). Thank you, Callum
  4. The sculpture is a box with faces and legs, so I could cut off the legs. The only problem is that the box part may be too heavy to lower into a top-loading kiln. I don’t want to cut through the box, because the cut marks would be clearly visible.
  5. I know quite a few schools and galleries which would be willing to fire ceramics, but none that could fire my sculpture.
  6. Hello, I am looking for a large kiln to rent, within a 2-hour drive of Oshawa, Ontario, Canada (near Toronto). I would like to fire a large (5ft tall, 2ft wide, 2ft deep) porcelain sculpture to cone 6. The kiln can be either a gas or electric shuttle/front-loading kiln, but the firings need to be oxidation. Does anyone here offer this service or know of a place where I could fire this sculpture? Thanks, Callum
  7. Okay. It would probably actually be better for me to glaze fire to cone 04, in terms of power use. Thanks for the help!
  8. They are the 500 series of Spectrum underglazes. Specifically a white one, a red one, a black one, and a brown one. The clear glaze also says to fire to cone 04, so is it okay to fire to cone 6 for this one as well?
  9. I am planning on making a sculpture out of cone 6 porcelain. I would like to use underglaze on the sculpture, so I bought some. But upon further inspection, I realized that the maximum temperature for the underglazes is cone 04. Is it okay if I bisque fire the porcelain to cone 6, then apply the underglaze and fire to cone 04? The porcelain has a porosity of 1% when fired, if that helps. Thanks, Callum
  10. The sculpture is 58cm in diameter and, when halved, 50cm in height. I do not know how large the kiln is, but the sculpture should be able to fit with some extra space. I think 2 or 3 boxes of clay were used, so about 100 pounds.
  11. Okay, I have something planned, but I would like some input or tips. My sculpture is on a strong but relatively thin particle board, and I am planning on drilling holes in each of the four corners of the board and tying ropes through the holes. The sculpture will then be carefully moved to a dolly and brought to the kiln. I will rent an engine hoist and attach the hook to the hoist. I will then hoist the sculpture up and lower it into the kiln. The ropes will be removed and the particle board will burn off in the kiln. Once the sculpture has been fired, it will be strong, so I will wrap it with straps and lift it down to the dolly using the engine hoist. Is this process feasible? Thank you for all of your support, Callum
  12. Thank you all for your suggestions. However, the problem is that the sculpture is too heavy to lift by hand. What type of system or machinery could I use to lift it? I am now talking about the weight of the sculpture, because I don’t know how to lift it. I don’t think I can use a pulley system, because I will be firing the sculpture in a public gallery.
  13. It’s a large hollow cylinder with a face on one end and an internal support structure made of several smaller hollow cylinders extending to the base of the larger cylinder. The cylinder has a diameter of 58cm and a height of about 50cm. The walls are quite thin (about 2cm thick). Sorry about being vague.
  14. I don’t really know how heavy it is, but I’m guessing about 100 pounds per half of the sculpture. And I understand now that it should be carried on a special pallet like you said, but how would I place it in a top-loading kiln without accidentally dropping it or putting the pallet in the kiln with it?
  15. Good idea, that makes sense. But my main question is: how do I actually lift such a heavy object? I mean, do I use some type of padded hoist or something like that?
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