I've attempted to use other 20vol developers when lightening my hair before and it never gets me to a light enough yellow - only orange. I used this developer with the BlondMe Advanced Neutralization Premium Lightener 9+ Powder and it worked so well! Got me to the pale yellow to be able to tone to my desired colour. And did not leave my hair feeling dry and fried. I'm so happy to be able to bleach my hair with less damage. Would recommend, and will continue using this duo together!