Zumber Posted November 1, 2012 Posted November 1, 2012 hello guys,i am going to make some 25 shot 3/4''diameter cake shots and i want some star formula that only consists nitrates,pvc,mg,al,charcoaland most of important it must be slow burning that can make some 3 or 4 mm stars......thanks for any replies
PyroAce Posted November 2, 2012 Posted November 2, 2012 Did you want a tailed effect, or your after a bright star?
yvariro Posted November 5, 2012 Posted November 5, 2012 you can try some charcoal streamers,like C6,C8,willow,and spider stars
Floydism Posted November 25, 2012 Posted November 25, 2012 I've just been playing with 'Yankee's flash stars', http://www.amateurpyro.com/forums/topic/2866-yankies-flash-stars/ Have a good look through the pyrotechnic compositions section, there are a few more suitable stars in there.
Zumber Posted November 26, 2012 Author Posted November 26, 2012 i have just tried yankies star with extremely fine(airfloat) atomizes aluminium but my stars burns with constant white than flashing.
Floydism Posted November 26, 2012 Posted November 26, 2012 I've had no flashing from mine either, with 250 flake Al they're a bright silver and with 200 spherical there's a bit of a delay with but the same result, i'm using very fine airfloat willow so that might be part of the problem. I'm going to replace the airfloat with some hand ground pine and see if that helps, but i'm still happy with it as i'm fairly limited in the chem department at the minute too, it might be worth dropping the amount of Al and increasing the coarse C to make a nice streamer. Let us know how you get on, There don't seem to be too many star comps out there using basic chems.
Zumber Posted November 26, 2012 Author Posted November 26, 2012 yankie mentioned 300 mesh atomized aluminium and I only have access to finest grade aluminium,this could be one of the reason for turning the star to constant white than flashing. yankie mentioned 300 mesh atomized aluminium and I only have access to finest grade aluminium,this could be one of the reason for turning the star to constant white than flashing.
Col Posted November 26, 2012 Posted November 26, 2012 250 mesh atomized al works ok. Milling the comp (minus the metal of course) for too long can stop them from flashing. Make sure the stars are completely dry before testing. Ground test of a 3/8" pumped star. http://youtu.be/UnzrwPqImf8
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