Pottery Art 155

ignorethechaos's version from 2016-04-25 15:41


Question Answer
absorbtionthe amount of water that a clay body is able to draw into its surface at a particular stage in the ceramic process
atmospheric water"wet" water that leaves the clay as it dries to the greenware stage and prior to the bisque firing
bisquethe first firing (to 1800 degrees/ cone 06) which makes the clay stronger yet porous and drives off its chemical water (known in UK as the bisquit firing)
chemical waterwater that is chemically bonded to the original clay but released during the bisque firing (through the process of sintering) at between 8-900 degrees- it dissipates into the atmosphere, permanently changing the clay and making it no longer able to be slaked.
china clayoften known as kaolin, this pure white firing clay is one of the primary ingredients in porcelain
chucka round bisqueware collar used to hold a leatherhard pottery form (usually a bottle form or other narrow necked shape) on the potters wheel to allow its bottom surface to be trimmed and finished.
clay bodya useful mixture of ceramic materials combined for a specific purpose.
crawlinga glaze defect where the glaze pulls away from the pot leaving its surface exposed- caused by too thick an application of glaze or an unclean bisqueware surface
crazinga glaze defect where a crackle pattern forms on the surface of the glaze-caused by too rapid cooling of the glaze or an uneven shrinkage between the glaze and clay body
colorantshighly refined oxygen/mineral compounds that are added to a clay or a glaze to give it color
damperthe ceramic plate used to close off or partially restrict the exit of gases from the kiln, providing the most immediate way to change the atmosphere inside the kiln
duntingthe cracking of fired pottery due to too rapid cooling of the kiln