Europe is the birthplace of hair products, and Wella started out as a wig company, but gradually turned to perms and other hair products. In 1927, Wella introduced the first hair iron, which was supplied to salons. In the 30s of the 20th century, Wella launched the portable hair ironing machine Wella junior, which was quite popular. Wella specializes in salon-specific products and has a significant share of the global retail market, with annual sales of more than 3.4 billion euros. In the 80s of the last century, when many foreign daily chemical brands had not yet opened up the Chinese market, Wella took the lead in entering the Chinese market and became the first professional brand to enter the domestic salon, promoting international hair dyeing and perm products to the Chinese market.
 
Hair straightening creams and perms are made on the same principle, both of which destroy and rebuild the disulfide bonds of the hair, but they differ in their use, straightening hair requires the help of a comb or splint, and curling requires the help of a curling pole to help form a curl. Another difference is that the straightener is mostly creamy and easier to stay on the hair, while the curling agent is generally liquid in order not to affect the upper curl bar and facilitate reapplication. Wella's perms are all liquid, and it is more convenient to perm straight and perm.
 
Wella products have excellent perm efficiency and are relatively gentle, and there are three series of products, each series of products are simply divided into strong and soft types, which can be purchased on demand. The main components of the softener are reducing agents and alkaline agents, which can destroy the disulfide bonds of the hair and soften the hair; The main action ingredient of styling agent is an oxidizing agent, which is used to rearrange and rebuild disulfide bonds that are broken by the softener to further style the hair.
 
The softener of Wella Volumizing Perm series is cysteine-type perm, which has not yet been standardized in China, but has been widely used in the world. Cysteine is milder than thioglycolic acid, less reducible, and less likely to damage hair. To enhance efficiency, the alkali ethanolamine is also added to the product. The smell of ethanolamine and cysteine is relatively light, and the overall irritating taste of the Volumizing Perm series is also low. Wella's styling agents are all hydrogen peroxide type, which can cause the color of dyed hair to fade due to the action of ethanolamine in the softener, so be sure to rinse off after using the softener before applying the styling agent.
 
The dynamic perm series uses the more common ammonium thioglycolate compound with cysteine, the softening efficiency is stronger than that of the plumping series, and the buffer uses ammonium hydroxide with ammonium bicarbonate, ammonium bicarbonate is milder than ethanolamine, which is not easy to cause excessive softening, but it is difficult to obtain a strong effect, and it is often combined with other alkaline agents. Ammonium bicarbonate, ammonium hydroxide and ammonium thioglycollate all have a heavier smell, so the ammonia smell of the dynamic perm series is stronger.
 
Perms are divided into cold perms and hot perms, the difference is whether they are heated or not, and the effect of hot perms is generally more durable. Cold perms and hot perms can basically be used together, but because hot perms are more damaging to the hair, hot perm products are generally added with antiheat agents and more conditioning agents. Wella's acid care series distinguishes between hot and cold blanching. Compared with cold perms, hot perms are added with petrolatum, cetyl alcohol, stearyl alcohol, white beeswax and other heat-resistant conditioning agents to help hair resist heat damage.
 
Wella's product specifications are mainly 100ml, suitable for single use, the price is about 90 yuan, and you need to buy it in the salon. Because perm has certain requirements for professional technology, it is recommended to go to a professional hairdresser for perm after purchasing the product. If you perm your own hair, you should pay special attention to safety, the thioglycolate in the perm is a highly toxic substance, which is easy to cause allergies, do not touch the mucous membranes such as the eyes and mouth when using, and try to avoid contact with the scalp.