The Story Behind This Sofa
Passementerie is the old European trade of making furnishing trims - fringes, braids, gimps, cords and tassels - and it survives because nothing else finishes an upholstered edge as well.
The brush fringe along this seat front does three jobs at once. It conceals the tack line where the upholstery is fixed to the frame, which is always the least elegant part of any sofa. It adds visual weight low down, so the seat does not appear to float above the plinth. And it introduces movement - a fringe shifts slightly as you walk past, which a hard edge never does.
Applying it is exacting. It must be sewn on, not glued, because glue discolours through the fringe head within a couple of years and fails entirely in humidity. It has to hang dead level across the full width, which means the seat front must itself be dead level - a fringe is unforgiving of a frame that is even slightly out. And the fringe head is mitred and closed at both ends so no cut edge is ever visible.