Material identification QB/T 1618-2018 Free formaldehyde QB/T 1618-2018 Decomposable Harmful Aromatic Amine Dyes QB/T 1618-2018 Color fastness to rubbing QB/T 1618-2018 The binding force of the buckle and the belt body QB/T 1618-2018 Belt breaking force QB/T 1618-2018 Appearance quality and sewing (bonding) requirements QB/T 1618-2018 Logo Identity QB/T 1618-2018