Firefly #2

Composition

33  
Charcoal (airfloat)
4.2  
Aluminium (400 mesh,12 micron, spherical)
4.7  
Sulfur
5.3  
Dextrin

Description

Can also be used as rocket propellant: Mix the chemicals, dampen, and granulate through a 20 mesh screen and dry. Use +3% by weight as a tail effect. Once you have passed the top core of the rocket by 1/2 inch, you may ram 100% firefly formula the rest of the way. You will end up with a beautiful long trailing tail of firefly.

Source: 
rec.pyrotechnics archive. Posted by Dan Bucciano.