¶ … ingredients for a stoneware clay body and a "storm cloud" glaze recipe that we will be using this semester.
Do not cut/copy and paste your answers!!
Stoneware Clay Body
XX Sagger 25 This is a type of clay from Kentucky originally. It is rich in silica and alumina and has minimal amounts of flux content and iron. It is a type of ball clay.
KY Ball Clay 25 This is the clay type that XX Sagger stems from. It is relatively light and makes clays become more mutable.
EPK 30 This type of clay assists glaze mixtures with a number of different processes including various facets of appliction, suspension, and gelling.
Grog 20 This type of clay contains silica and alumina, and was originally fired before it was ground. It helps to stop clays from shrinking when properly input into a mixture.
Custer Feldspar 10 This substance is a mineral mined from the earth that is useful in glazes. It helps to crystalize glazes and clays.
"Storm Cloud" Glaze Recipe
Calcium Oxide 4-7% This is a chemical compound that is fair colored. It is useful as a bleach when mixed with other substances to help produce a desired color.
Magnesium Oxide 0.5-1% Magnesium Oxide helps to matte glazes. It traditionally has the highest melting point of most other oxides.
Potassium Oxide 1-4% This is a compound ion comprised of oxygen and potassium. It usually appears as a pale, saffron powder. It is stable in heat and insoluble, which helps to render various forms of glaze and glass.
Sodium Oxide 1-2% This compund is useful in glazes because it produces a strong reaction when mixed with water that makes sodium hydroxide.
Titanium Oxide 2-4% This substance appears as a white powder. It is insoluble in water. It is used to color things whites when used for glazing purposes and with clays. It reduces some of the shine in glazes.
Aluminum Oxide 5-8% This substance produces utility in glazes and ceramics because it is hard and long lasting. It is fairly angular as well. It is useful for sandblasting and in recycling ceramics.
Boron Oxide 1-2% Although Boron Oxide dissolves in water, it is extremely stable with heat. Its stability when fired makes it good for working with glazes and glass.
Iron Oxide 2-4% This compound element is used to produce a red color in glazes. Iron Oxide produces rust, and the various shades of red it creates are differring rust-colored hues.
Cobalt 0.5-1% This is a mineral that is found in the ground that appears grayish in color. However, various cobalt compounds are widely used to engender blue hues in ceramics.
Silicon Dioxide 27-33% This is the glass-like substance that helps to form the backbone...
However, the main difference in these two is that there is a glassy 'shell' used in glazes, that is not found in work that only involves clay.
Additionally Define in your own words define the following:
Cone 6, Oxidation Firing This is a process in glazing in which there is heat added to a glaze so that oxygen can freely interact with it and transform whatever compounds are utilized with the glaze that are mutable to heat.
Stoneware This is a type of pottery that involves stone or looks stony in its appearance. It is usually comprised of large amounts of sand or flint (Guralnick, 1968, p. 1315).
Porcelain This is a type of ceramics product that is usually white or light colored and is occasionally transparent.
References
Glendale Community College. (No date) Introductory glaze composition. seco.glendale.edu. Retrieved from http://seco.glendale.edu/ceramics/glazecomposition.html
Guralnik, D.B. (1968). Webster's New World Dictionary of the American Languages. New York: World Publishing.
Must include a Bibliography: seco.glendale.edu/ceramics/glazecomposition.html - Cached
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