Ask just about any pyrotechnician or worker magician who uses pyrotechnics in their act, and they will likely tell you that sparkle additive is an absolute must, if you want to take your display to the next level. You simply sprinkle it onto some flash cotton, flash cord, or flash paper and it adds a seeming electric crackle with a sparkle to the effect upon ignition.
Sparkle additive shares a lot of the same chemical composition as a Fourth of July Sparkler. This often includes things like potassium nitrate or potassium chlorate may be used as oxidizers. Then small metal shavings are used to replicate the sparks.
You get a full fluid ounce of sparkle additive at a very reasonable price compared to the competitors. This is more than enough to punch up droves of flash cotton or to coat yards of flash cord and flash string. The sparkle additive can be applied well before performing the trick and will adhere easily with the fibrous nature of flash cotton clinging to it possibly for days of advanced prep.
It’s a great way to punch up the pyrotechnic flare of a lot of different tricks without necessarily burning a hole in your performance budget.