For the application on first grey hair we recommend to leave the mixture on for 5 minutes,  

For more than a few greys, we recommend  to leave applictions mixture on for a few more minutes.

If you are not sure which clolur to use, choose the lighter shade.

For Strong, natuaral-looking hair without any grey.

Lasts up to 28 washes.

This shade is suitable for natural Dark brown hair.