Primer Acid-based - NTN Premium 5ml NTN Premium acid preparation, the task of which is to etch the natural plate and prepare it before applying hybrid varnishes, gels and acrylics. The acid primer is dedicated to people with problematic nail plates, in which the styling does not remain. It should not be used too often due to the high concentration of acid. Frequent use may cause the plate to dry out and damage it due to excessive etching. WARNING The primer should not be used on the skin. How to use:Gently mattify the nail. The primer cannot be used directly on the skin. Before moving on to the next stage of styling, wait until the acid primer evaporates from the nail plate. Apply a layer of gel/hybrid varnish and cure in the lamp. Repeat the action and finish with topcoat.