What is used in a patch test before a color service?

A patch test is a crucial step before performing a color service to determine if a client has any allergic reactions to the hair color product. In this process, a small amount of color is applied to an inconspicuous area of the skin, usually behind the ear or on the inside of the wrist. This method allows the technician to observe how the skin reacts to the color formulation, ensuring the safety and comfort of the client.

Using a small amount of color enables the stylist to check for any signs of irritation or allergic responses without applying a significant amount that could lead to a more extensive reaction. It is essential for protecting both the client and the professional by minimizing the risk of adverse effects from the application of hair dye, which can contain powerful chemicals. Other methods, such as using a large amount of color or applying it to the scalp, would not effectively serve the purpose of a patch test, as they could lead to larger reactions or discomfort. Consequently, a small application allows for a thorough assessment in a safe and controlled manner.