A cosmetic primer is intended to be a base coat, allowing for a smooth, non-cakey application of liquid and powder products. A good cosmetic primer will provide long-lasting wear of foundation, eyeshadow, blush and lipstick.
Many primers, available in a variety of formulas, are designed to give oily skin a matte finish or dry skin from looking flaky. A mineral primer will contain botanical extracts, antioxidants, and vitamins to protect and heal the skin while creating a smooth canvas on the face.
Primers can plumpen and fill fine lines, reduce the appearance of large pores and even out your skin tone. After allowing a daily moisturizer to soak into your skin for a few minutes, smoothe a pea-sized amount of primer smoothe over your skin.