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Printing & Design / August 18, 2026

Paper Weights: What GSM Changes

A number on a paper sample says something about mass, but not everything about how the sheet will fold, feel or run.

Filed by The Printroom editorial desk · Source note: Printroom Process Library; editorial guidance

Paper Weights: What GSM Changes: a distinct production scene

01

Grammage is a comparison, not a personality

GSM describes mass per square metre. It helps a buyer compare papers, but bulk, stiffness, opacity, coating and fibre direction also affect the finished piece. Two sheets with the same grammage can make different folds and carry different visual weight.

Treat the number as the start of a conversation with the printer or paper merchant. Name the application, the folding pattern and the handling expectation.

02

Make the sample earn its place

A paper sample is most useful when it is marked with the process, finish and intended fold. It lets the team see ink holdout and read-through before a production choice becomes expensive to change.

Source trail

Printroom Process Library; editorial guidance. Read the editorial method for the difference between a standard, an archive observation and practical synthesis.