green dyeing of woolen yarns with weld and madder natural dyes in the presences of biomordant

Nowadays, using sustainable dyeing process has become a necessity, but does not meet performance requirements. application of biomordants was recommended to enhance the quality of dyeing. in order to design a green dyeing process, oak extract as bio-mordants and madder and weld luteola as natural dyes were used. the ftir-atr spectra of the washed wool yarn, mordanted wool yarn and mordanted dyed wool yarns confirmed bonding of wool yarns to the green mordant and dyes through a comparing chemical structure. the effective linkage between yarn, mordant and dye molecules removes the c-n peaks in ftir-atr spectra. after dyeing process, fastness and colorimetric attributes of dyed wool yarns were investigated. the k/s values of dyed wool yarns with extracted madder and weld luteola was quantified; properties including light, wash, and rubbing fastnesses were defined as per iso standard methods.