Porcelain Bead Set, Sandstorm Brown & Cream
The red brown and caliche cream colors of a West Texas dirt storm are glazed onto this set of 9 hand rolled, porcelain beads.The central cylindrical bead has a lace texture highlighted with iron oxide and was fired in a soda vapor kiln. This central bead measures 1" in length and has an exterior diameter of 1/2". The bead's hole measures 1/4" in diameter. The other beads both cylinders and rounds have holes measuring 1/8" in diameter.
Soda firings typically reach temperatures between 2300 and 2400 degrees F. At the height of the firing, soda ash in solution is pumped into the kiln through ports in the side of the brick kiln. In the high heat of the kiln atmosphere the soda breaks apart into its component parts and the sodium metal combines with the silica on the surface of the pots in the kiln to form a clear, glossy slightly pebbled glaze. The resulting glaze is highly abrasion and acid resistant. To your right is a picture of the kiln this bead was fired in. If you would like to learn more about this type of firing please go to http://www.facebook.com/porcelain.jazz . The Soda Firing album has a lot more pictures and information in it.
The rest of the beads in this grouping were fired to 2300 degrees F. in an electric kiln. Clays that are fired to these temperatures are very glass like in their durability and strength. Therefore, these beads should be treated as you would glass beads.
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