Tree City Black Hair Shampoo 25 ml x 24 pcsTree City Black Hair Shampoo: gives you black hair everday. Recapture your handsome black hair with this revolutionary, no fuss instant blackening shampoo. Black Hair Shampoo colors your hair black in just 5 minutes and lasts up to 4 weeks. Helps stengthen and nourish the hair and hair roots Helps give the hair a darker shade of color with a silky and shiny look.