Next, the "Brow Set" solution is applied for 10 minutes, and while it looks exactly the same as the Brow Style, it has a very different purpose. According to Lash Perfect Beauty Bar, Brow Set contains hydrogen peroxide, which (in technical terms) introduces oxygen into the hair structure which "reforms and realigns the disulphide bonds and stabilises the hair into its new shape or direction."
Image Source: POPSUGAR Photography / Ange Law