Yea , how they make the roman candles is really special. I have seen layers of powder as a delay and fuse. But I have never seen a plastic disk with a spanish timefuse in the middle as a delay between the comets. And they don't let you see everything because some things need to be secret I think.
I really would like to know the delay. It really looks like timefuse in the middle of a round disk.
Thats kinda strange then its : Visco, Timefuse in disk , Comet , Lift powder , Timefuse in disk, Comet , Lift powder.
So the comet lights first by the timefuse in the disk and then the burning comet lights the lift powder. That must be a slow burning comet otherwise it would burn away in the tube.