Category of hair dye: 5 common hair dyeing agents


What are the classifications of hair dyes? Today, Guangzhou Youji Daily Chemical Co., Ltd., a hair dye processing manufacturer, will take you to understand 5 common hair dyes. 1. Chlorinated hair dye The most commonly used hair dye Jing Dangshu is used as a permanent hair dye. The second agent of this hair dye contains oxidation dyes, called dye intermediates (with P-1 as the representative substance phenylenediamine, PPD). base dyes).

When used, the oxidation dye is mixed with hydrogen peroxide in the second agent to produce oxidative polymerization, thereby producing a pigment with a macromolecular structure. This pigment can stay in the hair tissue for a long time. Hydrogen peroxide can not only dye the hair, but also decompose the dark brown pigment in the hair corrugation or pith. Decolorization.

Therefore, the increase in brightness of the hair makes dyeing possible, so it can be used for fashionable hair coloring of "dyeing white hair black and making hair brighter""various applications. 2. Under the action of alkaline components, non-oxidative (metal) hair dyes make the hair swollen. After softening, polyphenols such as pyrogallol will react with iron ions, thereby dyeing the hair. This kind of staining is called "tooth black paste staining".

In order to prevent hydrogen peroxide from overly strong decomposition reaction due to the presence of iron ions or the use of decolorizing thorns or oxidation dyes, low-concentration perm agents should be used to remove iron ion components before use. 3. Depigmentation agent These products can be used to increase the brightness of the hair, change the color of the hair, and the shape is pink or milky white. From the point of view of type, it can be divided into two types-one is a decolorizing agent, which can be mixed with ammonia and other alkaline components to obtain a strong oxidation effect.

The other is depigmentation agent. The product can be further enhanced by the addition of peroxides such as persulfates. Although it does not cause allergic reactions, it is because the pH value is generally high, and attention should be paid to hair damage and skin irritation.

4. Acidic hair dye materials Acidic hair dyes (such as HairManicure and acidic HairColor contain acid dyes (tar pigments). Under the use of benzyl alcohol and other solvents and acidic conditions, it can penetrate into the hair cuticle and combine with the hair through ionic bonds for dyeing .This hair dye does not cause much damage to the hair and rarely produces an allergic reaction, but it can cause discoloration or stain the skin due to reasons such as sweating.

Therefore, be careful not to touch the scalp when using it. 5. Hair color material This hair dye contains burnt pigment or carbon black, which can be attached to the surface of the hair to produce a dyeing effect. Although its characteristics are simple, it will change color due to bathing, so it can be said to be a temporary dye.

Its basic components are resins and oils.

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