foundation A foundation primer, also known as a makeup primer, is a cosmetic product applied before foundation or other face makeup. Its purpose is to prepare the skin for makeup application, creating a smooth and even base. Here are some key features of foundation primers:Smoothing the Skin: Primers help fill in fine lines and pores, creating a smoother surface for foundation to glide on and adhere to.Longevity: Primers can extend the wear time of makeup, helping it last longer throughout the day without fading or creasing.Color Correction: Some primers have color-correcting properties to address skin issues such as redness, dullness, or uneven skin tone.Hydration: Certain primers are formulated to hydrate the skin, which can be beneficial for dry or mature skin types.Oil Control: Mattifying primers can help control excess oil and shine, making them