Composition type: special effect star
Effect: These stars glow orange for a short time before erupting in a bright white ball of light, similar to a camera flash. The larger the star is, the more strobe-like it becomes. These stars are great for those with limited access to chemicals as it uses only the most basic ingredients.
Aluminum (300 mesh, atomized): 20
Boric acid: 1
Method, Ball mill all the ingredients except the aluminum for no more then 5 minutes, it may ruin the effect if it is milled longer.
Screen the aluminium into the mix using the screen method until the mixture is homogeneous. Now wet the composition with water:alcohol (75:25) (methylated spirits works). The stars can be pumped or cut, but must be bigger than 4mm as they may not work if they are smaller. Cutting the stars is easiest as you can paint a black powder slurry on the top of the slab before breaking it apart, thus only priming one side and allowing a longer delay. If you prime them on all sides the delay is reduced. Priming is not 100% necessary.
Summary, 4mm stars tend to flash 1 or 2 times, 8mm stars will flash 3-4 times and the bigger the stars get the more flashes and more rapidly they will flash.
Heres a video of a 4mm pumped star on the ground:
Here is several 4mm stars in a 2” shell: http://uk.youtube.co...h?v=duV42UxNV7U
And some 8mm stars in a 2” TT shell: http://uk.youtube.co...h?v=RQl3iNOSxvU
Edited by TheSidewinder, 10 December 2008 - 01:45 PM.
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