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Grams per square metre, or pounds per unusual ream.
Also known as: GSM, Basis weight
Paper weight in the metric world is grams per square metre, which is directly comparable between any two papers. The American basis weight is pounds per ream of a sheet size that differs by paper type, so the same number describes quite different papers.
States paper weight as grams per square metre, which is directly comparable between papers of any size.
Contexts: Packaging
Is stated in the American system as pounds per ream of a basis size that differs by paper type, so two papers with the same figure can differ substantially in substance.
Contexts: Packaging
A numeral followed by three lowercase letters, printed on a ream wrapper or a specification.