The Skin Has Wonderful Protective Responses . In The Deeper Layers Of The Epidermis Are Cells Which Produce Melanin_A Pigment That Gives The Skin Its Colour. Melanin Protects The Skin From The Rays Of The Sun. When The Skin Is Exposed To The Sun , The Production Of Melanin Increases. Once It Is Produced , Melanin Matures And Moves Into The Upper Lear's Of The Epidermis. In Some Skin , This Transfer Of Melanin Gets Blocked And There IS No Pigmentation . On The Other Hand , The Transfer Is Accelerated , Resulting In Pigmentation And Dark Skins.
In Fair Skins ,Melanin Gets Gradually Destroyed As It Moves Upwards Towards The Horny Layer Of The Epidermis. In Dark Skins , The Destruction Of Melanin Does Not Continue As Far As The Superficial Layer.
Therefore , The Skin Surface In Dark Skins Contains Much More Melanin. As melanin Is A Dark Pigment , The Skin Surface Acquires A Dark Colour . More The melanin, Darker Is The Skin.
