Carmela Sales 5th hour Puzzle 5

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Across
  1. 1. a common flux that melts at 2102- 2372f
  2. 2. _____ sand is used to reduce firing shrinkage
  3. 4. flint is usually contaminated with this
  4. 5. a hardener that is commonly used for fine ceramic material and has high electrical insulation.
  5. 7. the mineral form of silica powder
  6. 9. a clay ___ is what is made when other components are added to clay.
  7. 11. quartz that is above 573C
  8. 12. silicates using RO fluxes tend to soften more ____
  9. 15. clay from the ground would have to be heated ___ than you want in order to vitrify
  10. 17. quartz has a more ___ crystal structure in comparison to flint
  11. 18. ___ quartz refers to room temperature quartz
  12. 19. flux lowers the amount of heat needed to melt ____
  13. 20. add hardness and whiteness to a clay body
Down
  1. 1. the crystalline form of silica
  2. 3. a microcrystalline form of quartz that acts as a hardener
  3. 6. silica sand is used as a ___ on kiln shelves to prevent ware from sticking
  4. 8. ___ syenite melts at 2012-2192f
  5. 10. silicates using R2O and R2O3 fluxes soften more ____
  6. 13. ____ makes up to 25% of a clay body and it fuses at 2282f
  7. 14. silica sand is often used instead of grog in clay bodies
  8. 16. ____ alter the temperature in which clay vitrifies