Merlin Posted January 13, 2015 Posted January 13, 2015 Green flash Source: rec.pyrotechnics Comments: Preparation: potassium perchlorate.............................6 barium nitrate....................................3 Aluminum powder...................................5 Do I assume correctly the barium nitrate should be milled to a very fine powder and that the aluminum is german dark?
Zumber Posted January 13, 2015 Posted January 13, 2015 Yes Perchlorate and Barium should be fine powder and for flash aluminum should be very fine (flake/dark).
gregh Posted January 13, 2015 Posted January 13, 2015 How green will that actually be? Does the perchlorate provide enough chlorine to move the barium to green from white?
Zumber Posted January 13, 2015 Posted January 13, 2015 Actually colour will be pale green not deep green addition of chlorine donor externally will reduce burn rate considerably and wont make faster flash.
FlaMtnBkr Posted January 13, 2015 Posted January 13, 2015 You won't get much free chlorine from the potassium perchlorate. I've never had much luck with similar formulas. Even ones using magnesium that have less black box radiation than aluminum. They also need to be smaller salutes and at a long distance to see even a hint of color. I might try replacing part of the perchlorate with AP to get some free chlorine. I have too many things I want to try.
Merlin Posted January 13, 2015 Author Posted January 13, 2015 I added parlon and it was light green with a low report. But still powerful enough.
schroedinger Posted January 14, 2015 Posted January 14, 2015 If you got really fine mg you should also try 1:1 Mg to barium sulphate. It gives really nice clear flash and a strong report. Normal visco is enough to ignite it.
GalFisk Posted January 14, 2015 Posted January 14, 2015 (edited) I've done 50:50 Ba(NO3)2:Mg and +5% or +10% parlon. The parlon lowers the bang but enhances the color.How fine would the Mg+BaSO4 need to be? Could MgAl work at all? I have 20um MgAl and 63um (I think) Mg. Edit: i actuall enjoy the non-bang of parlon-weakened flash in small amounts. 1 gram with the above Mg and 10% parlon in small non-glued plastic balls went "foof" the last time I tried. Quick, brilliant light, almost no noise. Edited January 14, 2015 by GalFisk
schroedinger Posted January 14, 2015 Posted January 14, 2015 The barium sulfate doesn't need to be that fine, if you got the fluffy stuff, passing once through 40 mesh is enough.-325 mesh atomized mg is fine enough.By adjusting the size you can of course adjust the behavior.If you use mgal you won't get the green color.
Merlin Posted January 29, 2015 Author Posted January 29, 2015 I've done 50:50 Ba(NO3)2:Mg and +5% or +10% parlon. The parlon lowers the bang but enhances the color.How fine would the Mg+BaSO4 need to be? Could MgAl work at all? I have 20um MgAl and 63um (I think) Mg. Edit: i actuall enjoy the non-bang of parlon-weakened flash in small amounts. 1 gram with the above Mg and 10% parlon in small non-glued plastic balls went "foof" the last time I tried. Quick, brilliant light, almost no noise.Yep I use BaNO3 and dark aluminum with parlon to slow it and lower the pitch and it is green
Recommended Posts