NUTRI COLOR filters 400 100 ml NUTRI COLOR filters #400 100 ml is a hair dye filter formulated to help protect the hair from damage caused by hair dye. The filter is designed to reduce the amount of oxidative stress that can be caused by hair dyes, as well as reduce the amount of chemicals that can be absorbed into the scalp. The filter also helps to protect the hair from discoloration, fading, and brassiness. This filter is suitable for all hair types and colors.