A lash lift and tint works by using chemicals to re-shape the natural lashes and then dying them for a darker, fuller look. First, a lifting solution is applied to curl lashes around a silicone rod, breaking down their bonds so they can be reshaped. Next, a setting solution locks them into their new, lifted shape. Finally, a tint is applied to darken the lashes, and a nourishing agent is applied to finish the treatment.