Mix with hair colorant 1:2 dioxy milk, run aground to more than 8 degrees, and wash hair with silicone-free shampoo.
Blow-dry the hair until it is 90% dry. Divide the hair into 1cm thick.
Make 10-15 hollow rolls throughout the head.
Heating is very important (the hotter the hair, the more lasting the colour will be, and the firmer the colour will be when shampooing).
Let cool for 20 minutes and rinse off with warm water. No shampoo required the first time.
Dry the hair repeatedly with dry hair and blow dry with cool air along the hair scales (use protein plant care solution to stay on the hair for 3-5 minutes and then rinse, which can make the hair soft and bright, smooth and solid and lock the color)