Understanding the Impact of Using 30 Developer Instead of 20 for Toner: A Comprehensive Guide
When it comes to hair toning, developers play a crucial role in achieving the desired color. The developer, also known as the oxidizing agent, helps to open up the hair cuticle and allows the toner to penetrate and deposit color. The most common developers used for toning are 10, 20, and 30 volume. However, the … Read more