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| Putting the finishing touches to the wicket on my gas fired salt kiln. |
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My work is divided approximately equally between three kilns. My new three chambered wood firing kiln has demanded much of my attention recently in part due to a Creative Wales Award from the Arts Council of Wales specifically designed to allow me to experiment and develop this aspect of my work. My other kilns are still in commission and the older and trusted oil kiln is, for the moment, the mainstay of my operation although I fully intend the wood kiln to take over that position.
Salt Glazing is an exciting, but often less than predictable, method of firing pottery. As the kiln approaches the height of the firing the temperature has risen to a white hot 1260°C. At this point I throw small packets of common salt into the fireboxes of the kiln where it reacts with the intense heat and vapourises. The sodium from the salt reacts with the silica and alumina from the clay to form a glass or glaze. This process continues until I have used 15 lbs. of salt and the temperature has risen to the searing white heat of 1300°C.
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| Three chamber wood firing kiln. |
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The manufacture of Salt glazed pottery first began in 14th Century Germany and spread to England by the late 15th Century. By the end of the eighteenth and throughout the nineteenth Century Salt Glazing became widely used in industry to produce millions of cheap utilitarian wares such as ink or Ginger Beer bottles. Salt Glazed pots are typically rich in texture and colour, the texture often compared to orange peel and the colours ranging from deep and intense orange to pink and yellow sometimes with a lustre reminiscent of Mother of Pearl.The wood kiln has a 'salt chamber' which has provided something of a challenge in acheiving the surfaces that I can obtain from the gas fired salt kiln. |