Not sure if you got your answer but ... Heeey I know Your hair and skin
have a PH between 4.5 and 5.5. So, finding a shampoo in that range will
cleanse your hair but not strip the color or the natural oil it needs.PH
is a number on a scale between on...
(Sunday) Shampoo by Bumble and bumble ! i freakin l0ved this shampoo i
used this in a few ways !! it was good if your haircolor took too dark!
or if you wanted to remove a semi color put this on get under A hair
dryer for about 20 min a pow the color...