If you're a habitual makeup user then your brushes probably experience a lot of wear and tear every day. This means not only that you must clean them right after you use them, but also that their logos and brush numbers - MAC 216 for instance, fade away quickly.
But if you're a makeup fiend who's very particular about your brushes then it's important to have that number on so you know which brush to use (especially if you're watching a makeup tutorial). So to learn how to keep the logo and number in place, check out this video.
(Level: ALL) We recommend either using lacquer or varnish or artist's fixative. You can also use PPA (perfect paper adhesive).