Back a few years ago. I did this a gorgeous Highlight and modified stack on Elizabeth. I used Kenra lightener with no Ammonia. I did it in very thin sections. About 1/4 inch sections and did a Heavy foil. No heat was needed. I Used 20 volume peroxide. I shampooed with Kenra brightening purple shampoo & cut & styled to perfection to 💕 Another 💯satisfied quest……………………