There are better and better hair dyes on
the market thanks to the producers. Some of them cover grey hairs 100 %, but it
is still very usual to mix base colours to fashion colours for perfect
concealment.
Percentage ratio of grey hair
0 - 30% -
no adding of base colour necessary
30 - 50% -1/3
base colour is needed to combine
50 – 70% -
½ base colour is needed to combine
70 – 100% -
pre pigmentation or ¾ base colour is needed to combine
