In order to select a treatment shampoo properly, the type of hair and scalp and their condition must be taken into account: for example, the scalp may be oily, but the hair may be dry because it has been dyed or permed. If there is any aesthetic alteration of the scalp or hair. Frequency of washing: if the client washes his hair every day, we should choose a shampoo for frequent use. Its detergent base is gentler and will not excessively drag the secretions from the scalp.
Another aspect to take into account when choosing a shampoo is the technique or work to be carried out after washing the hair:
Temporary or permanent changes of shape: cupping, curling or straightening.
For each job and for each hair type and situation there is a different shampoo.