Is it better to perm curly hair cold or hot?

For many women, they prefer perming. Perming is mainly divided into cold perm and hot perm. It cannot be said that one is better. It should be said that each has its own advantages and disadvantages. They have different degrees of softening, and the perming process will also be different. In addition, different hair qualities should choose different perming methods. Of course, you should also pay attention to not perming frequently. Perming can cause considerable damage to hair.

Is it better to perm curly hair cold or hot?

Difference 1: Different degree of softening

Hot perm chemicals can 100% change the hair's disulfide bonds, and the hair needs to be dry to show elastic curls. However, within 15 days after perming, which is the consolidation period, it is best to use styling products that increase elasticity.

Difference 2: Different processes

Cold perm: plasticity - softening - shaping

Hot stamping: softening - plasticization - shaping

During cold perm, if the room temperature does not reach 15 degrees, we can perform external heating appropriately and control the temperature below 40 degrees. Because excessive heating during cold perm will cause excessive loss of protein in the hair, the curls will lose elasticity.

Hot perm requires heating, the purpose of which is to reorganize the severed divalent bonds in the hair in a memory-like manner. The memory reorganization of the chain bonds can only occur between 100 and 140 degrees, so the heating temperature must be controlled between 100 and 140 degrees, and the moisture must be dried.

Difference 3: for different hair quality

Cold perm is a perm method that opens the hair scales, and the effect is good after healthy perm. After perming, damaged hair will become loose, frizzy, or even break.

Hot perm is a perm method that closes the hair scales. It was originally created for damaged hair. It can replenish the internal nutrition of the hair to the greatest extent and reduce damage to the hair.