Black hair is the darkest and most common of all human hair colors globally. It is a dominant genetic trait, and it is found in people of all backgrounds and ethnicities. It has large amounts of eumelanin and is less dense than other hair colors. Black hair is known to be the shiniest of all hair colors.
Black hair comes in a variety of textures.Straight black,wavy hair ，curly hair，and curly or wavy black hair is the most common
Hair coloring
Permanent hair color:This is a very popular way to achieve permanent hair coloring is through the use of oxidation dyes.The ingredients of these products include 1,4-diaminobenzene or 2,5-diaminotoluene,a coupling agent,and an oxidant.The process is typically performed under basic conditions.
Demi-permanent hair color:Demi-permanent hair color is permanent hair color that contains an alkaline agent other than ammonia and,while always employed with a developer,the concentration of hydrogen peroxide in that developer may be lower than used with a permanent hair color.
Semi-permanent hair dye:Semi-permanent hair color has smaller molecules than temporary dyes.These dyes only partially penetrate the hair shaft.For this reason, the color will survive repeated washing,typically 4–5 shampoos or a few weeks.Semi-permanents contain no,or very low levels of developer,peroxide or ammonia,and are therefore safer for damaged or fragile hair.
Temporary hair color:Temporary hair color is available in various forms including rinses,shampoos,gels,sprays,and foams.Temporary hair color is typically brighter and more vibrant than semi-permanent and permanent hair color.It is most often used to color hair for special occasions.
