Blue Strobe Cut Firework Stars from Russ X
Ammonium perchlorate 25
Guanidine nitrate 55
Copper, atomized, -100 mesh 7.5
Copper oxide, black 5
PVC, suspension grade 7.5
Russ’s notes: "Bind with nitrocellulose lacquer, enough to bind them together, but not enough for them to be tacky. Copper powder is used in the best blue strobe pyrotechnic formula in Pyrotechnica XIV (BK0114). Playing with this as a base, I have lifted shells that contained blue strobe firework stars. I cut them into 1/4 - 3/8" cubes, then 'roll' them in a bowl to consolidate them. As you roll them in the bowl, they become denser and take on a round profile. A light misting of 1:1 MEK/lacquer thinner is sometimes needed to keep the surface from drying out too fast. You have to be gentle when you start rolling these fireworks stars so that they don't crumble. For some reason, the crumbs don't like to reconsolidate into fireworks stars that will strobe. I prime them with a thermitic perchlorate prime (superprime) after they have dried for a couple of days. The issue with making this on a regular basis is the guanidine nitrate availability and the pain of cutting the fireworks stars and then rolling them to consolidate them."
The guanidine nitrate is difficult to acquire for some probably unless you have the raw guanidine and access to nitric acid.
Found more on this page, author states a lack if testing of some of them though.