TEETH / SLIDER / TRACK
Open / Closed
Two states of the same object: separated tracks, joined tracks, changing direction, and visible tension.

Visual principle
Treat the zipper as a linear hardware system: teeth, slider, opening, fabric edge, and repetition rather than clothing instruction or product buying.
What to notice
Look at tooth spacing, metal finish, slider geometry, the split between open and closed tracks, stitching, and the contrast between hard hardware and soft textile.
Editorial use
Use narrow vertical crops for long tracks, macro details for teeth and sliders, and one wider textile image to keep the archive from becoming overly mechanical.