Fig. 3From: Dyeing and fastness properties of Quercus robur with natural mordants on natural fibre a Relative colour strength (K/S) of the dyed fabrics in Salix alba L. (wood ash). M1: without mordant, M2: pre-mordanting, M3: simultaneous mordanting, M4: post-mordanting. b Relative colour strength (K/S) of the dyed fabrics in Populus deltoides Bartram Ex Marsh. M1: without mordant, M2: pre-mordanting, M3: simultaneous mordanting, M4: post-mordantingBack to article page