Pottery Firing In A Home Made Kiln скачать в хорошем качестве

Pottery Firing In A Home Made Kiln

This is my first firing of a home built kiln where I was able to bisque fire pottery. The Kiln: For the burn chamber and chimney I used refractory bricks and insulated kiln bricks. Plugging the holes with cob, a mix of clay soil (from my garden and straw) The wood feed was made from a semi circular piece of corrugated iron covered in a layer of cob The pottery inside the kiln was suspended using a rigid iron grating (this bent during the firing, I will need to fix this) The clay and pieces: It is important to have a clay that is tempered, this will minimise cracking during the varying temperatures of the wood firing. I used a 40% tempered commercial clay and a local clay that I purified and added 30% temper. I made mainly robust pieces that by their form were strong again to avoid breakage. Though I did try a few statues that were less robust. The wood: I used palette wood, that I further split with an axe to make smaller piece for a faster and hotter burn. The firing: I started the fire at the entrance of the wood feed and maintained 100ºC for about an hour to heat the pieces up slowly removing any residual moisture. Not allowing the flames to come in contact with the base of the pieces. Very slowly over the hour that followed that I increased the temperature to 200ºC then again slowly increased the fire and temperature allowing the flames to come in contact with the pieces and reaching 400ºC. At this point I pushed the fire further down the wood feed and started to add more wood to go for full firing capacity. The wood feed fully open and the chimney fully open. The pyrometer indicated over 850ºC that I was able to maintain for some time. I think that in the middle of the kiln I got up to around 900ºC. After a good moment at this temperature I half closed the chimney using bricks. Then some time after that I closed the entrance of the wood feed and three quarter closed the chimney to allow for a slow cooling and prevent cracking. Conclusion: 100% success. No cracks, no explosion in the pottery ! I will have to improve on the iron grating that supports the pottery, it bent during firing. I was very surprised that the kiln did not consume that much wood. In the future firings I will try to improve the design and functioning of the kiln to be able to reach higher temperatures to be able to glaze the pottery. Great music for your videos at Artlist. Get 2 extra months for free on your subscription with this link:https://artlist.io/Gaetan-2299116 #kilnfiring #primitivepottery #pottery