GSM
Find the weight in grams per square meter (GSM) for a ream of paper, based on its basis weight.
Basis Weight (lbs.) X 1406.5 / Basis size = GSM
The weight in grams per square meter (GSM) for a ream of 25 x 38” book paper that has a basis weight of 45 lbs. is: 45 x 1406.5 / (25 x 38) = 67 GSM
Result:
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