6-8.Depth of pigmentary deposit
	Depth of pigmentary deposit that understands from tone ●The tone of the bristletail and freckle is various from light brown with a burned umber or a blue black and purple brown. This is because of differing according to the amount of the melanin pigment and the existing position (It is deep and shallow in the skin). In general, brown becomes strong by becoming near the surface of the skin. When the amount and the density rise, it tends to become near the burned umber and the black. It becomes it is in the comparison shallowness, and a little the amount, too for a drab bristletail and freckle.
	●It might enter dermis, and this is a bristletail and freckle that purple and blue drove as soon as though the melanin pigment exists in stratum basale. Seeming that blue is worn originates in the difference of the penetration level of the ray. The reason for Mongolian spot seen in baby's hips is that the melanin pigment of the corium has concentrated. It disappears with growth.
	●The color can be lightened with keratinization before long, and the bristletail and Sobacas of a dark blue tone be erased because it does because of the melanin pigment that exists in the epidermal. It is difficult to lighten it caused by the melanin pigment of dermis. It remains as it is without exhausting it by the renewal in dermis.