5-10 minutes.
According to the query on Alibaba 1688: Dr. Shangguan’s shampoo is recommended to be washed for 5 to 10 minutes. This time can effectively dilute the shampoo to achieve the best effect. If it exceeds this time, the shampoo will The chemical ingredients will irritate the scalp, which is detrimental to the health of the scalp, and if the time is too short, it will not be washed clean.
In addition, when washing your hair, it is recommended to massage your scalp with your fingertips to avoid scratching with your nails to avoid irritating the scalp and causing damage. At the same time, pay attention to keeping the water temperature moderate to avoid irritation to the scalp if the water temperature is too high or too low. Rinse thoroughly when rinsing to prevent shampoo residue from causing damage to your hair.