: A blasting cap typically contains two types of explosives: a small amount of highly sensitive primary explosive (like silver azide or lead azide) and a larger base charge of high explosive.
Because secondary explosives are designed to be stable for transport, they require the concentrated shock or heat from a blasting cap to initiate a full detonation. How They Work blasting cap
A , also known as a detonator , is a small, sensitive explosive device used to trigger larger, less-sensitive secondary explosives like dynamite or C4. : A blasting cap typically contains two types