What is the main function of a primer in makeup application?

The primary function of a primer in makeup application is to create a smooth base and prolong the wear of makeup. Primers are designed to be applied after skincare and before foundation to prepare the skin for makeup. They help to fill in fine lines, minimize the appearance of pores, and create an even surface on which foundation can be applied. By doing so, primers allow for better application and blending of foundation or other makeup products.

Additionally, many primers contain ingredients that can help increase the longevity of makeup by making it adhere better to the skin, reducing the chances of it fading, settling into fine lines, or becoming patchy throughout the day. This is especially important for individuals looking to maintain a fresh appearance without frequent touch-ups. Overall, while primer may have some additional benefits, such as providing some hydration or oil control depending on the formulation, its primary purpose is to enhance the foundation application and longevity of makeup wear.