The idea
Instead of dragging solid colour into the lip in one heavy pass, the artist moves the machine in small circles, tight zig-zags or a 'whip' motion, letting the needle tap in discrete dots. From reading distance the dots read as a wash; up close there is texture, not a slab.
Sparse dots on the first pass, then more passes filling the gaps, raises density gradually. Because the eye blends them, 70% coverage can look like full colour — and heals far better than actual full coverage.
Passes and layers
A typical lip is worked in three-plus passes: establish, build, and refine/blend. Between passes the artist wipes, re-assesses evenness, and re-numbs. Colour is judged wet and remembered to be heading darker in the heal, then lighter in the fade — so the target on the day is 'a touch less than you think'.
Common errors
Going over the same spot until it 'looks like lipstick' (trauma, not retention); inconsistent pressure leaving stripes; slowing the hand so dots merge into packed colour; chasing centre saturation while the border stays thin.
