A base primer may function as a moisturizer, or oil may be absorbed by it with help or salicylic acid in making a less oily, more matte look. It raises the longevity of the base, and helps in implementing the base more evenly and easily. Some include alternative ingredients like grape seed extract and green tea extract, or antioxidants including A, C, and E.
There are water-based and silicon-based base primers. Fixings may contain dimethicone and cyclomethicone. Some primers don’t include scent, oil or preservative. Some may also have sun protection factor (SPF). Some base primers are tinted to even out or enhance colour or skin tone. Others give a pearlized finish to make the complexion light reflective. There are also base primers that are mineral-based primers, which include silica and mica.
Eye or eyelid shadow primers are alike, but made especially to be used close to the eyes. An eyelid primer may mattify, or inversely may add shimmer may reduce oiliness may help the colour of the lid and upper eye region. Eye primers prevent it from piling up in eyelid creases help in the smooth application of eye shadow, and enhance its longevity. There are numerous brands of eye shadow primers out there. Two eye shadow primers that are popular contain Urban Decay Primer Potion and Too Faced Shadow Insurance.