Preferably, {HEAD ~ a trichromatic dye mixture} comprising at least one yellow dye, {TAIL ~ at least one red dye} and at least one blue dye is used 
comprising
Preferably , { HEAD ~ a trichromatic dye mixture } comprising at least one yellow dye , { TAIL ~ at least one red dye } and at least one blue dye is used
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH