Easy to use! Just apply
"Easy to use! Just apply it like foamy shampoo and leave it for 30 min. For anyone who doesn’t read labels (like me) this dye does have developer in it. Using it once in a while is fine. But if your hair is already chemically processed (bleached/permed/etc) AND you wanna use this dye multiple times, you definitely need to use a hair mask/condition/leave-in product afterwards to replenish moisture to your hair. My hair was bleached from black to blonde before I started using this dye and it can be drying after dyeing it 2-3 times (spaced out at least 2 weeks between sessions). I did not know it had developer in it until my 4th use."