Bigen Men’s Speedy Colour - 102 - Brown Black

Bigen Mens Speedy Hair Color Inspiration. Invention. Innovation.With a century's experience in black & brunette hair coloring, Hoyu can help you obtain a better understanding of hair for more effective coloring in the future.Hair Structure:Hair shafts consist of 3 parts: Cuticle, Medulla, and Cortex.Cuticle is the outer layer of the hair shaft, which is made up of overlapping transparent keratin cells. It works like a protective scale. Each cuticle cell is composed of several different layers such as A-layer, exocuticle, and endocuticle. It is resistant to chemicals and protects the cortex from chemical influences.The cortex is where moisture and natural pigment (called "melanin") are held. No other part of the hair shaft has pigments. Melanin contained in the cortex determines the natural color of your hair. Some hair color products, especially when lightening hair, work on melanin. Melanin is missing from gray hair.Medulla is the core of the hair shaft. Sometimes the medulla is absen