GSM in relation to paper represents ‘grams per square meter.’ It is a metric measurement of paper density, indicating the mass of one square meter of a particular paper type. For example, standard office copy paper typically has a weight of 80 gsm, signifying that a square meter of this paper weighs 80 grams.
This weight is a crucial factor in determining paper quality, thickness, and suitability for different applications. Higher weight often suggests a thicker, more durable sheet suitable for printing photographs or creating brochures. Lighter weights are generally used for everyday documents where cost-effectiveness is prioritized. Historically, the concept of measuring paper weight in this standardized manner facilitated consistent production and trade within the paper industry.