Paper greater than _______ g/m2 is called paperboard.
a) 200g/m2
b) 100g/m2
c) 500g/m2
d) 300g/m2
Answer: a
Explanation: Paper greater than 200g/m2 (GSM) is called paperboard, as defined by ISO. GSM- Gram per square meter is used to express the amount of fiber. Paperboard is thicker than paper and has a higher weight per unit area.
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