Hair Color
Hair color is determined by the melanocytes found only in the matrix area of the follicle at the base of the cortex directly above the follicular papilla, Melanocytes transfer packages of melanin (Melanosome) to the cortical cell during the active growth phase (antigen). Eumelanin is the dominant global pigment and confers black / brown hair.
Pheomelanin, a mutation of eu-melanin, is the predominant pigment found in red hair, Blond hair is a complex mixture of the two melanin’s, but in principles is relatively devoid of pigment compared to black or brown hair. Greying of hair is a normal manifestation of aging and illustrates progressive reduction in melanocyte function, probably influenced by the accumulation of reactive oxygen species.
Hair Diameter
The diameter of human hair varies from 17 to 180 micrometers. Hair less than microns is regarded as vellus hair. Hair texture is a less precise term but is usually classified as follows:-
Fine Less than 60 microns
Medium 60 to 80 microns
Thick 80 to 150 microns
Many women, on questioning, believe their hair to be finer than accurate measuring would confirm. This misunderstanding may affect their sometime less-than-ideal choice of hair care products.
No comments:
Post a Comment
Thank you for contacting us, we will response ASAP