If your natural hair colour is between light blonde and dark blonde, you can lighten your hair by up to 2 shades using 7.0 Kolora Natural blonde, 7.65 Kolora Almond blonde, 8.0 Kolora Golden blonde, and 9.8 Kolora Ash blonde, or by up to 3 shades using 10.2 Kolora Pearl blonde.
The usual developing time of hair dye is 30 minutes and it ensures saturated colour result. For lighter shades and in case of stubborn grey hairs, you may extend the time up to 45 minutes in order to obtain more intense colour and even hair coverage.