Professional tip: the orange foils are up to seven with 15 volume. This seems to be a bit of a slower and more gentle lightener. The mermaid green is flashlift with 20 volume. Flashlift seems to have good strength to get the job done efficiently. The purple foils are flash lift with 30 volume. Using the progression of developer strength and choosing lighteners carefully ensures a beautiful outcome in a timely fashion! I refreshed her ends with a bit of Balayage and dropped her base after processing with shades EQ 7N, 7NB, and a bit of 7P. I love a fresh highlight!