SKIN TYPES

SKIN TYPES The skin intends to protect human beings against environmental aggressions. The one most closely classifications connected with cosmetological requirements  distinguishes four different types: normal, oily, dry and mixed. The criteria of selection to define each category are difficult to standardize since they vary from one case to another. For example, severe changes in epidermal water content associated with superficial ph changes can modify the skin’s appearence and lead one to establish a visual diagnosis of dry skin, whereas it may be actually an oily skin. Dry skin would correspond to structural and functional modifications of the components of the epidermis. Oily skin would result from an excessive seborrheic production, invading skin surface and possibly hair. Oily skin and…

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