puzzle 10

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Across
  1. 4. firing dunts
  2. 6. must not melt before the burning out
  3. 7. 573C 226C
  4. 12. 1 percent
  5. 13. can be reshaped by strong pressure
  6. 16. 800 degrees C
  7. 20. Will require proportionately longer
Down
  1. 1. biscuit dunts
  2. 2. is over when the kiln vents are dry
  3. 3. of clay is driven off
  4. 5. 573 degrees C
  5. 8. is also required to withstand
  6. 9. contains vegetable matter
  7. 10. is the bound water
  8. 11. can only dry where the water can evaporate
  9. 14. are filled with water but the large pores have drained
  10. 15. during the later stages of firing
  11. 17. carbon and sulfur are presented in clays and remain to be burnt out
  12. 18. water of plastic clay
  13. 19. unable to dry out