What should be monitored when applying chemical hair treatments?

When applying chemical hair treatments, it is important to monitor the hair's elasticity. Hair elasticity refers to the hair's ability to stretch and return to its original shape. This is a critical factor because it helps determine how much chemical treatment the hair can safely withstand without causing damage. When the hair is overly processed or damaged, it may have decreased elasticity, which could lead to breakage or undesired results during the chemical treatment.

Understanding hair elasticity allows the stylist to assess the condition of the hair accurately and make informed decisions about the strength and duration of the chemical application. For instance, hair that is too elastic may indicate it is in good condition and can handle a strong chemical treatment, while hair with poor elasticity may require a gentler approach or conditioning treatments prior to any chemical work. This knowledge is essential for achieving the desired results while maintaining the health and integrity of the hair.