My hairdresser at the salon avoids bleaching the roots to prevent scalp damage, but even so, I experienced a slight itch on my scalp while using this shampoo, whether it was because I didn't rinse well or something else.
I recommend rinsing thoroughly with this shampoo compared to others.
The color comes out really well in a gray tone, but the problem is that there is a color difference between the bleached roots and the rest of my hair... lol
(I only bleached the roots 1-2 times while the other parts were bleached around 6-7 times.)
Because of the color difference between the bleached roots and the rest, I bought this to reduce the yellow tone at the roots, but the boundary ended up being more pronounced, going from Kotoribeige-yellow (roots) to Ash Gray-yellow (roots)... lol
I plan to adjust it a little bit each time I wash my hair!
I'm really happy with the color :)