This Huffington Post article outlines something called dry cutting, a technique where you don’t shampoo the client’s hair before cutting. This way, the stylist can see how the hair will naturally fall with the new cut. You can chip away at the hair, a very artistic way of cutting. A stylist interviewed for the article said: “When you’re cutting hair dry, you see the shape as it’s forming, so you just get a much more definite look, because you see it in action”.
Check it out: Getting Your Hair Cut Dry