We speak to three founders who are transforming the business of black hair and beauty. What? Makeup brand Why? To make lipsticks that cater to black women When? Founded 2013 Who? Florence Adepoju, cosmetic scientist Incumbents: Sleek, MAC, Iman, Bobbi Brown, NYX MDM Flow is a makeup brand – and a movement. ‘Three years ago I only cared about the product,’ …