Fabric Weight and Area Density Determination
topic
Fabric weight measurement per ISO 3801 cuts defined sample areas of 100 square centimetres from fabric conditioned at standard atmospheric conditions of 20 degrees Celsius and 65 percent relative humidity, weighing on a precision balance and expressing as grams per square metre, with calculated weight from thread count and yarn count providing a check of measured weight and revealing discrepancies indicating measurement error or fabric construction deviation from specification.
Role
Provides the most fundamental fabric physical specification that determines material cost per metre, garment weight, and the fabric weight classifications used for end-use selection, with GSM being universally used for fabric specification in commercial transactions, quality certificates, and technical specifications across all fabric categories from sheer 30 GSM voiles to heavy 700 GSM technical canvas fabrics.