In chemical services, when does most of the processing occur?

In chemical services, most of the processing typically occurs during the initial period when the product is applied to the hair. This is because the chemical reactions that cause changes in the hair structure, such as in the case of perming or chemical relaxing, often peak shortly after application.

During the first few minutes, the chemical agents actively penetrate the hair shaft, starting the process of breaking down the existing bonds within the hair structure. This initial phase is crucial for ensuring that the treatment can effectively establish its effects, which include altering the curl pattern or modifying the hair's texture.

As time progresses, the processing usually involves maintaining the effects initiated earlier. While there may still be some chemical action occurring toward the end, the key transformations primarily happen in that first 5 to 10 minutes, making it the critical window for effective processing in chemical services.