Bottiglia - La mappa degli eventi
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Size: H 19 cm - D 14 cm
Technique: Wheel Throwing Clay: Commercial grogged stoneware (medium chamotte) Glaze: Dry Yellow Ochre (based on a J. Jelfs' recipe). Wood-fired - Cone 10 - Reduction |
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Firing in a wood-fired kiln, cone 10, in a reducing firing.
Iron turns red tones where the glaze is thinner and feels the engobe underneath. Ash settles where it can producing yellow spots and a shinier greenish patch where thicker. The glaze has a composition derived from J. Jelfs' Dry Yellow Ochre in which all calcium carbonate is replaced by washed wood ash. The ash gives more impurities in addition to its different composition than calcium carbonate. The engobe, based on kaolin and ball clay, contains 8% iron oxide. The application of the glaze - in its very liquid state - was by casting, resulting in an uneven thickness, ranging from thin to very thin. The shape, in addition to determining the pouring of the glaze, defines the areas on which ash can be deposited during firing. The yellow patches on the top of the shoulders, the most exposed part, denounce this mode. The material of the body is a medium-grained stoneware, the character of which, given the very thin thickness of the glaze, is shown by touch and sight. |
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