ISO 12625-6:2005 specifies a test method for the determination of grammage of tissue paper and tissue products. Grammage may be measured by determining the mass of a test piece or test pieces of tissue paper or tissue products cut to specified dimensions, or by determining the mass and area of a specified number of units of finished tissue products.
BS EN ISO 12625-6:2005 Tissue paper and tissue products - Determination of grammage has been changed from BS EN 12625-6:1999 Tissue paper and tissue products - Part 6 : determination of grammage.