Perm, cold perm or perm, which is better?

Cold perm and hot perm have their own advantages, and the differences are as follows:

1, the operation method is different: perm with a heated curling iron, which has high technical requirements and cannot burn the hair roots. Cold perm is to apply some chemicals to the hair and complete the perm through chemical action, which can be from the root to the end of the hair.

2. Different temperatures: Perm requires a higher temperature, generally between 100-140. Cold perm does not need high temperature, just curly hair at room temperature.

3. The effect of curly hair is different: because perming has an effect on the substance inside the hair, it is easier to keep the shape of the hair by perming, and the hair can reach 70% curl when it is dry. Cold perm hair curls very well when it is wet, and only 30% curls when it is dry.