Definitions (2)
1. International: Weight of paper expressed in 'grammage' grams per square meter (gsm or g/m2). Stock weights (used in paper and printing industries) are expressed in terms of kilogram per 1000 sheets of paper.
2. US: Weight of a ream (500 sheets) of 25 x 38 inch paper in pounds. Also called basis weight or paper substance.
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