International Standard ISO 1172 (1996-12-15). Textile -glass-reinforced plastics--prepregs, moulding compounds and laminates--determination of the textile-glass and mineral-filler content-- calcination methods = Plastiques renforces de verre textile--Preimpregnes, compositions de moulage et stratifies--Determination des taux de verre textile et de charge minerale-- methodes par calcination (International Organization for Standardization, 1996)