What safety measure should be taken when using chemical treatments?

Performing a patch test is an essential safety measure when using chemical treatments. This practice involves applying a small amount of the chemical product to a discreet area of the skin, typically behind the ear or on the inner arm, and observing it for a designated period. The purpose of this test is to identify any potential allergic reactions or sensitivities before applying the treatment to the entire head. This proactive step helps protect clients from adverse reactions that could result from allergens in the product, ensuring their safety and comfort during the hair treatment process.

In contrast, using a larger amount of product does not guarantee better results and may increase the risk of irritation or damage to the hair and scalp. Always using the same brand for all treatments may not be advisable, as different brands can have varying formulations that may not interact synergistically. Additionally, applying chemical treatments on dry hair is not universally applicable, as some chemicals may be formulated for use on damp hair, which can help with even distribution and absorption. Thus, performing a patch test is the most prudent and safety-focused choice among the options provided.