es: PARAGÜERO
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Umbrella stand: It is usually round and tall and placed near the front door to keep umbrellas and walking sticks. The photo shows a large jar, 46cm high and 22cm in diameter made for this use. They are decorated with the Majolica. Method
es: BAJA COCCIÓN
Under firing is when the ware being fired does not reach the correct heat. This can be caused by the kiln not working properly or a product not being correctly prepared.
Bisque: It is very difficult to know when it is under fired, but if sounded it will be flat and the color might be different from other pieces, so if in doubt, fire it again. If it is decorated and then fired, as the clay will continue shrinking and the glaze won’t, it will cause faults in the glaze, making it matte and cracked.
Glazes: if under fired they will have a matte surface and if fired again to the right temperature they will vitrify correctly. This can be caused by something incorrect with the elements inside the kiln or with the products being used. Sometimes a fired piece can be half matte and incorrectly fired. If this occurs, cover it with a thin layer of glaze and re-fire it, at the same heat. The transparent glaze, when crude, has an uneven surface but when fired it will integrate and leave a shiny surface. With modern industrial tiles there are many problems and one is that when they are decorated and fired to the correct heat they are matte, which gives them the appearance of being under fired. The solutions to these problems are explained under the word: tiles.
See: Tiles problems 1 & 2.
Up-draft kiln: It is one of the oldest methods of firing. It is round, made with bricks and narrows at the top to form a chimney. It has a floor and under it the wood is burned. The air enters through the doors, the pressure of it pushes the heat and the gases up through the floor, round the ware being fired and up and out at the vent at the top. The vent is narrow so the heat collects and increases round the work and fires it.
Uranium dioxide: is an oxide used to form and modify colors such as red, yellow, orange and green.
It is also called: urania, uranic oxide, uranium oxide.
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A black, crystalline compound, UO2, insoluble in water, used in nuclear fuel rods, in ceramics, and pigments.
Dictionary.com Unabridged. Based on the Random House Dictionary, © Random House, Inc. 2009