Basic Ceramics3

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Learn some of the fundamentals of glazing and firing ceramics

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Basic Ceramics3

  1. 1. <ul><li>Introduction to basic glazing, Raku </li></ul><ul><li>and pit firing techniques </li></ul><ul><li>Level: 6th to 8th grade </li></ul><ul><li>Various curricular integration </li></ul><ul><li>Social Studies: Native Americans </li></ul><ul><li>& Ancient Cultures </li></ul><ul><li>Science: Chemistry & Temperature </li></ul><ul><li>Lesson Plan by Noreen Strehlow </li></ul>Basic Ceramics Pt.3 Glazing & Firing
  2. 2. <ul><li>Equipment needed: </li></ul><ul><li>An electric kiln (most universities also have a Raku kiln and large gas kilns) </li></ul><ul><li>Bricks, shelves, cones, protective clothing and tools </li></ul><ul><li>A large metal garbage can with holes drilled all over can serve as a pit fire kiln </li></ul><ul><li>Colored slips, terra sigilatta, underglazes, glazes, brushes, tongs, mixing tools </li></ul><ul><li>Storage and work areas suitable for glazing and firing greenware and bisque work </li></ul><ul><li>An airbrush with proper ventilation </li></ul>
  3. 3. <ul><li>Students will learn that slips and terra sigillatas go on leather-hard clay which must </li></ul><ul><li>be bone dry before bisque firing </li></ul><ul><li>Students will learn that bisque fired pieces can be underglazed and glazed and then cone fired </li></ul>Leather-hard The condition of a clay body when much of the moisture has evaporated and shrinkage has just ended, but the clay is not totally dry. Carving, burnishing, or joining slabs are often done at this stage. Bone Dry Clay that has the moisture completely evaporated. It can no longer be scored and slipped without compromising the strength of the piece. Bisque Clay that has been fired to a state hard enough for glazing Slip Clay suspended in water. When it is a yogurt consistency it can be used to join pieces with scoring. When a cream consistency with a coloring agent added it can be painted on leather-hard pieces and burnished. Greenware Unfired pottery or sculpture.
  4. 4. <ul><li>Students will learn about the Raku process </li></ul><ul><li>Students will learn that special glazes need to be used for Raku </li></ul><ul><li>Students will learn that the Raku process creates very unique effects </li></ul>
  5. 5. <ul><li>Students will learn that protective clothing must be worn </li></ul><ul><li>Students will learn that sandals are NOT proper protective foot covering!! </li></ul><ul><li>Students will learn that it gets really, really hot around the Raku kiln </li></ul>
  6. 6. <ul><li>Students will learn that the Raku process is faster than cone firing pieces </li></ul><ul><li>Students will learn that the Raku process is a very exciting sensory experience </li></ul>
  7. 7. <ul><li>Students will learn that you need to set up a sand pit with buckets for the pieces </li></ul><ul><li>when they come out of the kiln after firing </li></ul><ul><li>Students will learn that after being put in the sand with shredded paper, etc. for </li></ul><ul><li>15 min., the pieces are then immersed into water to complete the Raku process </li></ul>
  8. 8. <ul><li>Students will learn that after 15 min. under the buckets, the pieces will be </li></ul><ul><li>immersed in water to complete the Raku process </li></ul>
  9. 9. <ul><li>Students will learn that you often get unexpected results with Raku </li></ul>
  10. 10. <ul><li>Students will learn that you can also pit fire bisque pieces </li></ul><ul><li>Students will learn that you use terra sigilatta for best results in the pit fire </li></ul><ul><li>Students will learn that the pit fire is a slow but relatively inexpensive process </li></ul><ul><li>Students will learn that a garbage can, paper, branches, leaves, and even trash </li></ul><ul><li>can be used for a pit fire </li></ul>
  11. 11. <ul><li>Students will learn that you must pit fire outdoors or in a well ventilated area </li></ul><ul><li>Students will learn that because the pieces are packed on top of each other, </li></ul><ul><li>they must be sturdy </li></ul>
  12. 12. <ul><li>Students will learn that you must watch a pit fire carefully </li></ul><ul><li>Students will learn that pit firing is a slow process, depending on the size of the pit </li></ul>
  13. 13. <ul><li>Students will learn that pit fired pieces have a very rugged, blackened look </li></ul>
  14. 14. <ul><li>Students will learn about electric and gas kilns used for bisque and cone firing </li></ul>
  15. 15. <ul><li>Students will learn that leather hard pieces can be stained and scratched into </li></ul><ul><li>(Scrafitto) </li></ul><ul><li>Students will learn that leather hard pieces can be scratched into and have stain </li></ul><ul><li>rubbed into the grooves. (Machina) </li></ul><ul><li>Students will learn that underglazes and glazes can be added to bisque pieces </li></ul>
  16. 16. <ul><li>Students will learn that the shiny smooth look is achieved in cone firing </li></ul><ul><li>Students will learn that the glazes flux in the heat, forming a glassy surface </li></ul><ul><li>Students will learn that often results are not what they expected </li></ul>
  17. 17. <ul><li>Students will learn that the shiny smooth look is achieved in cone firing </li></ul><ul><li>Students will learn that the glazes flux in the heat, forming a glassy surface </li></ul><ul><li>Students will learn that often results are not what they expected </li></ul>

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