Before you start make sure you have your coloring tools! For first time users, please note that the Herbatint Application Kit, containing a brush, measuring cup and protection cape is sold separately. This reduces waste as all items included are made to be re-used. Need to know: If you have more than 30% of grey and you wish to apply one of the C, D, R or M shades, it is suggested to mix your chosen color with a N shade of the same number. Full details in the instruction leaflet