The distance of migration is inversely correlated with the molecular weight of the protein (small proteins move faster through the gel than large proteins do and therefore migrate further down the gel).
Gel nail polish is, hands down, the most popular service at nail salons right now. But many women may not be getting what they think they're getting. CND's Shellac is a brand of gel nail polish. It was the first to hit nail salons, offering a no-chip, super-shiny nail color lasting up to two weeks.
Gel manicure is a type of manicure that uses a coat of gel applied on the nails, with regular polish on top. The use of UV light to cure the gel allows the manicure to last longer. Shellac is a technology invented by Creative Nail Design (CND). It is similar to regular nail polish, but also uses UV light in between coats, which make it last as long as gel manicures.