Production of hair coloring products

Hair dye has hundreds of years’ history as a cosmetic using for beautifying people's lives. As early as the Song Dynasty of China, ancient Greece, Egypt and the Roman era, people began to use plant dyes coloring hairs. With the progress pace of the times, people’s requirements are getting higher and higher. Plant hair color can not meet the requirements. Thus a variety of chemical substances appeared in the hair dyes.

According to the solid and product forms, hair products can be classified of hair as following categories. It can be divided into temporary and semi-permanent and permanent; stained solid form of the biotin product, can be divided into a liquid, emulsion, paste, powder, shampoo type and several, but are generally hair color stranded in the persistence of the time hair to classify and determine its use.

Temporary hair dye has poor firm and it is intolerant for washing. Generally only temporary adhesion as a temporary modification of the surface of the hair, wash all removed, repair hair after the hair on the temples or for actors for cosmetic use. This hair dye is often used effectively deposited on the hair surface and does not penetrate to the hair dye within the basic dyes, acid dyes, disperse dye or metal dyes, such as: azo, anthraquinone, triphenyl methane, phenazine or benzoquinone imine.

Semi-permanent hair dye ability shampoo washing several times (5-6 times), and can keep the color of 3-4 weeks. This type of hair dye, dye can penetrate into the hair cortex and direct hair does not need to oxidants, the hair can be dyed a variety of bright color. Semi-permanent hair dye use general hair keratin affinity of low molecular weight dye, mainly nitrobenzene diamine, nitro aminophenol, Amino Anthraquinone and their derivatives.

The most commonly used permanent hair dyes, dye-phenylenediamine, p-aminophenol, o-amino-phenol. With these dyes alone is not enough, sometimes need to use other minoxidil dyes, with the media and intermediates, the formation of the hair matrix, under alkaline conditions, the oxidants generated different shades hair. Oxidative hair dye with a certain degree of irritation and allergic skin, in hair must first contact with the skin test.

Commercial oxidation hair dye forms: powder, liquid, paste, and hair shampoo. Although the shape is different, but similar to their main raw material. Almost all oxidation type hair dyes are based on the two packages, a matrix or vector containing the dye, the other agent is the oxidation of the chromogenic reagent. Use, the two agents the amount of mixing, and then evenly coating the hair, over 30-40min after the water rinse, can the original white hair or gray hair dyed black or other colors. Powdered hair dye they use a single-phenylenediamine dye, add some thickeners and other auxiliaries prepared from hair color was black, but dull, do not look very natural.

The liquid hair dye generally uses solvent dye as the carrier. After mixing with oxidizing, it is like water. Because it is the liquid product, it is difficult to adhere to the surface of the hair. But it is easily contaminated on skin and clothes. Adding some thickener and surfactants additives into cream hair dye matrix, it will mixed with the oxidizer in viscous or semi-liquid state hydrocolloid. It is characterized by easy to adhere to the hair surface. It is good for the dye molecules penetrate into the hair and are it is not easily tarnished on skin and clothes. The hair will has true color and natural characteristics. Shampoo hair dye is usually dissolved water-soluble dye in the shampoo containing acid surfactant. The cosmetics material’s surface active agents use the non-ionic or zwitterionic type. Hair shampoo is relatively simple to use. Generally hair shampoo has low viscosity. When dyeing, you can just pour the shampoo on your hairs and then make it around. After 20mins, wash your hair with water. Hair shampoo is suitable for use in your family. Source:http://www.cosprm.com