In school, we were taught never to allow a tip to cover more than two-thirds of the nail bed, but pretty much all tips do! Why should it not cover more than two-thirds?
Maggie Franklin: The tip is just a sort of scaffolding. It is not what gives the enhancement support and strength. There are tips with full wells and tips with cut-out wells. The tips with full wells are the ones that look like an entire nail. The idea with a full well tip is that your will end up filling away a lot of the overlapping plastic in the blending process. I prefer using a cutout well which has an inverted half-moon appearance and only covers a small portion of the natural nail. This way there is much less filing involved with blending the tip into the natural nail.
Although I cannot tell you why “they” say the tip should not cover more than two-thirds the natural nail (and I think two-thirds is way too much, by the way), I can tell you my reasons for covering as little of the natural nail as possible with a tip. As I said before, the tip is not where the strength of your enhancement comes from, so the tip doesn’t need to cover the nail. The resins used to attach tips will usually become brittle and break down before the tip has grown out unless only a small portion of the nail was covered (meaning the shortened tip will grow out faster). I also feel that it is best to have as much of the overlay product in direct contact with the natural nail as possible.