Color scale chart to easily check hair brightness level for dyeing.An essential product for hair salons, hairdressers, and hairdresser trainees. It is basically brown, but there is a slight redness difference. product composition 1 Card ringWhite Hair : Ratio 80%, 50%, 30%, 10% Melanin Of Red Series: 1-20 (High red melanin ratio-Black Hair, Red Hair) Melanin Of Yellow Series: 5-20 (Low red melanin ratio-Yellow Hair)