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.
I receive a lot of questions about UV and LED lamps for curing gel polish, and thought it might be helpful to provide a brief comparison of the two. Most gel polish manufacturers sell lamps that are compatible with their products, and you will usually get the best results when using a lamp provided by the manufacturer.