Cationic yarn, one of the custom products of Dastranj Rezabaft Co., is produced by modifying the molecular chain structure of standard polyester (PET) through special chemical treatments and additive systems. This yarn offers superior dye uptake when compared to conventional polyester yarns.

Thanks to its unique characteristics, cationic yarn can be easily dyed using basic dyes. When combined with regular polyester yarns, it allows for melange (heathered) effects in fabrics.