Definition
Fuse is the cord that carries fire. Slow fuse, known as visco or safety fuse, is a braided, varnished thread of black powder that burns at a constant rate of about one centimetre per second, giving the pyrotechnician time to withdraw after hand lighting; it also serves as a delay between two pieces. Fast fuse, or quick match, is bare black-powder match (black match) enclosed in a paper sleeve: the flame travels along it at several metres per second and ignition becomes practically instantaneous, which allows several pieces to be linked so they fire together. Fuses are cut with a knife, joined with paper joints or connectors, and are classified as pyrotechnic articles; their storage and transport follow the same rules as fireworks.
In practice, for the display company
Even with electric firing, fuse is everywhere: in cakes, chains, waterfalls, set pieces. PyroDesk tracks rolls of slow and quick match in stock alongside the fireworks, estimates the length needed per composite piece in the firing plan, and includes these articles in the explosive-content totals of the declaration.