Accurate description recipe find here
https://mx5-kevin.blogspot.com/
More info in the amateur Pyrotechnics and chemistry forum:http://pyroprojektek.org/index.php?/blogs/entry/6-toturialhow-to-make-professional-firecrackers-from-household-materials/
How to make strong firecrackers (petard) at home this is original home made firecracker and its very loud and powerful
The Flash powder is complete fill the paper tube, and its looks like a strong array but its not a strong array but this time for good because the flash powder is well fills densely the paper tube.But when you unpack the firecracker the Flash powder are friable and not a array.If The Flash Powder is not enough dense insaide the firecracker, or good quality flash powder firecracker will be much weaker.But if you press your flash powder in a array your firecracker will not work. Before you load the Flash powder the firecracker do a test paper tube and follow the video.
Flash powders for petard firecracker: Kmno4/al/s 60/30/10%, Kclo4/al/s 50/40/10%, Kno3/mg/s 50/40/10%, Kclo4/mg/s 50/40/10%, The loudest of the Kclo4/Mg/s
The firecracker paper glued by water glas sodium silicate upper and lower 2cm gypsum closing the firecracker
Firecacker petard 1 (smaller)Made it by 2 piece 7cm large 14,5cm long write paper wrapped in 0,5cm staw full paper lenght 29cm
Firecacker petard 2 (larger)Made it by 2 piece 7cm large 21cm long write paper wrapped in 0,7cm pencil full paper lenght 42 cm
In this video i tried softly compress the flash powder.This was a mistake in my method.Its works but my later tests I realized the flash powder must be veary losely loaded.The paper thickness are veary ideal.