Ash-grey lies towards the darker end of the grey spectrum. To achieve this color, the hair needs to be bleached to the lightest shade of blonde. At a hair coloring salon, professional hairdressers would usually apply a bond strengthening treatment in order to protect the hair strands during bleaching.
After bleaching, a purple toner will be applied to cancel out the yellow undertones in the hair. Following that, another coloured hair dye will be added to achieve the desired ash-grey result