Nic Strobel Puzzle 5

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Across
  1. 2. What alters the vitrification temperature of the clay?
  2. 3. What makes up 5%-50% of an earthenware body clay?
  3. 5. Cristobalite is available as a what?
  4. 7. Flint was first formed as what type of rock?
  5. 9. What is a crystalline form of silica?
  6. 12. What flux melts at 2012-2192f?
  7. 13. Silica sand is often used instead of what material?
  8. 14. Silica sand is also used as a lubricant on the shelves of what?
  9. 16. A clay body is mode up of how many components?
  10. 19. Fluxes do not act how?
Down
  1. 1. what flux makes up 25% of a clay body?
  2. 2. Alumina is most commonly used in what type of ceramic material?
  3. 4. Flint is not for what?
  4. 6. Flint is usually contaminated with what?
  5. 8. Fluxes and what are the most important materials to change clay.
  6. 9. What flux melts at 2102-2372f?
  7. 10. What is it called when you add extra things to clay after you dig it up?
  8. 11. What material acts as a hardener in glass, glazes, clays, and all ceramic materials.
  9. 15. What is the mineral form of silica powder used in ceramic glazes and clay bodies.
  10. 17. Alumina has the same sintered cystal body as sapphire and what other gem stone.
  11. 18. What is often used to reduce body firing shrinkage and fired warpage?