Glass and Paint

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Across
  1. 2. dioxide the chemical name for silica
  2. 5. paint chippings
  3. 7. Circular pattern of cracks
  4. 9. different layers of paint
  5. 10. Used for comparison analysis
  6. 12. The speed of something in a given direction
  7. 13. laminated and tempered glass made of two layers
  8. 15. In the original place
  9. 16. Glass containing lead oxide
  10. 19. Fragments of glass left on the side of an impact
  11. 20. without a clearly defined shape or form
Down
  1. 1. type of safety glass used for windshields
  2. 3. one refractive index as opposed to anisotropic
  3. 4. Analyzes the composition of trace levels of glass
  4. 6. Heat- or chemically treated safety glass
  5. 8. The most prevalent type of glass
  6. 11. cracks that move outward
  7. 14. Heat resistant glass
  8. 17. brittle solid madeby heating a mixture of silica and other materials
  9. 18. more than one refractive index