The perfect way to start eyelash treatment the right way! Apply Primer Blink Pofessional® to natural lashes for best results in a lift and greater retention of extensions. Eyelash Primer is used on clients' eyelashes before starting treatment for a couple of different reasons. It removes oils and residues from natural eyelashes, provides an optimal pH level for the products to take effect. Mode of use: Apply a thin layer to the eyelashes. To do this, it is recommended to wet a lint-free applicator with Primer. Take another dry lint-free applicator and rub the two together.