Results With 20 Volume Developer and Baking Soda (& 30,40)
The bleaching powder you use in combination with the developer raises the pH of your hair to 9 or 10, which opens the cuticle and makes it easy for the developer to reach the hair cortex. But there can be a list of reasons you may not want to use it. So, can 30 volume …
Results With 20 Volume Developer and Baking Soda (& 30,40) Read More »
