Test Your Knowledge
1. One disadvantage polycarbonate has versus acrylic is the percentage of optical transmittance. What is the percentage of optical transmittance for polycarbonate per ASTM D 1003?
a. 80 to 84 percent
b. 85 to 89 percent
c. 90 to 94 percent
d. 95 to 99 percent
2. The impact strength of polycarbonate is how many times stronger than that of glass?
Don't worry if you didn't know the answers. IAPD's bookstore has plenty of resources to help you learn about plastics, or you can contact the experts — IAPD distributors at www.iapd.org.