cavelamb fired this volley in
m:

That almost looks like the fuse used for the Jetex rocket
motors. It is a dark brown color, and actually has a copper wire
core.
This made it possible to light a folded length of it electrically.

That's called "igniter cord", not "fuse". The brown color comes from the
composition, which includes lead tetroxide as a secondary high-
temperature oxidizer -- so-called "red lead". If it has only ONE wire
(on the inside), it is not made by Explo Brazil. Their igniter cord has
one copper wire in the center, and a stainless steel "carrier wire" just
inside the outer jacket.

The majority of the igniter cord used in the world today is made by Explo
Brazil, under the trademark of "Mantitor Ignitor". It comes in several
speeds.

The Germans and Swedes also make varieties of it. Ensign Bickford,
famous for fuse and blasting caps/initiators doesn't seem to be
interested in that particular market anymore.

LLoyd