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  4. What does transparent, crystal and Opal mean?
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  • Glossary (7)
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  • What is the difference between light transmission and lightning?
  • What is the difference between single-skin and double-skin?
  • What does transparent, crystal and Opal mean?
  • What is the difference between illumination and lighting?
  • What does polyester, PVC and polycarbonate mean?
  • What is the difference between Reaction to fire and external fire resistance?
  • What is the difference between a bituminous membrane and a breathing membrane?

What does transparent, crystal and Opal mean?

• Transparent: one can see the shape, not the colour.
• Crystal: one can see the shape and the colour.
• Opal: one can’t see the shape or the colour.

Have you found your answer?

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