This is a rinsing process I actually place a towel over the blonde before rinsing the black and get my client to hold the towel, shampoo the black , condition the black then shampoo and condition the bleach out of the back . I don’t have a problem with the @manicpanicnyc rainbow Color’s running because they’re patelised using Olaplex’s no.2 so that creates a protective film when rinsing that doesn’t run . It’s important to clip the dark away from all the blonde especially because we do blue blac