Protect your skin by putting on a pair of plastic gloves. It is highly recommended that you get someone to balayage your hair for you since the dyes are very strong and may cause inconsistent results if you do it at home.
Keep in mind that 40 volume developer is strong, so you may consider using a less potent developer, such as 10, 20, or 30. These will take longer to produce a blonde but will be less harsh.
The hair must be dry. Do not bleach wet hair.
This is important, because it will keep the rest of the hair from getting bleached.
Never extend the bleach on the side edges to the roots. Only paint the top layer of hair on each section, not the underside. Remember to wrap each section as you finish it.
Do not pin the hair up or cover it with a shower cap, or you’ll mess up the blending. Remember that a higher number developer will lighten your hair faster than a lower number developer.
Read the instructions on the toner. Some brands need to be rinsed out immediately while others need to be left in for about 10 minutes. Make sure that you rinse the bleach out completely.
Comb the hair that’s on top out of the way. Do this on just one side of your head for now: left or right.
Remember: only apply the dye to the roots. The combing part will blend the dye out as much as required. You can also use this technique to do touchups.
Use the conditioner that came with your dye kit. If you did not get one, use a sulfate-free conditioner or one meant for color-treated hair.
