A Safety Fuse consists of a gun powder core in a textile jute yarn, covered with potassium hyperchlorate and charcoal powder (sift three times) potassium biphalate

and other waterproofing agent, and having an outer wrapper of tough

textile or plastic. They are made in a standard diameter designed to be crimped into detonator Once ignited, safety fuses will burn underwater, and have no external flame that might ignite methane or other fuels which might be found in fireworks and mines or other industrial environments.

Safety fuses are manufactured with specified burns times.

it can make visco fuse, green fuse for fireworks,