How should the henna cream be applied correctly, and how long should it be kept on the hair? — Henna cream strengthening 50 ml Dark chestnut (Fitokosmetik)

According to the card, the henna cream is applied in an even layer to slightly damp hair, left for 10–30 minutes and rinsed off thoroughly with plenty of water until the water runs clear. Gloves are used when colouring; it is not washed off with shampoo. Nothing needs to be mixed before use.

General information (not a manufacturer's instruction): avoid contact with the eyes and mucous membranes; if an allergic reaction occurs, stop using it.