Why is crystal polystyrene clear? What will be an ideal ...

[rachel9]

Why is crystal polystyrene clear?
 
  What will be an ideal response?

Question 2

Would you expect ABS to be clear or opaque? Why?
 
  What will be an ideal response?

[trog]

Answer to Question 1

The clarity comes from the ability of light to pass through the material unimpeded by any internal barriers. Crystal polystyrene has no crystalline structure to interfere with the passage of light

Answer to Question 2

Clarity comes only if light transmission is unimpeded in passing through the plastic. ABS is usually multiplastic and so every phase boundary is a potential light-scattering location. Hence, ABS is generally opaque.

[rachel9]

Both answers were spot on, thank you once again

[trog]

Great! Please up vote