Explanatory notes
… called blasting accessories, are required to ignite powders and explosives. The heading covers : (A) Safety fuses. … or primer cords) serve to transmit one or more detonations, and generally comprise a core of PETN or penthrite … fuses) . The PETN explodes at a rate of approximately 6.5 km (4 miles) per second. Detonating cords will initiate …
