Bubbles - 25-3-2023 at 10:44
Me and some friends want to play the Colombian game 'Tejo', which involves throwing a heavy metal disk at little paper packets filled with something,
I don't know what, I have read gunpowder, flash powder, flash powder with sand or ground glass.
I have dabbled with fireworks and with amateur chemistry, but not a combination of the two. I have sodium chlorate, sulfur, potassium nitrate and a
bunch of stuff more, but not perchlorate, which I heard gives a safer flash powder than chlorate.
Do you have tips for making a friction-sensitive powder that we can safely make and process? We don't want to have to resort to bang snaps 
Laboratory of Liptakov - 25-3-2023 at 14:19
When you need something, you could give a link. For clear explanation. Like this one, or another one...
https://www.youtube.com/watch?v=l5FlN-15N-Y
Because clay is wett, you will need hermetic confinement. If you use hermetic confinement against moisture, you can use NaClO3 (which is hygroscopic)
+ fuel. One from best fuel is in this case potassium ascorbate.
https://www.youtube.com/watch?v=mMcIuQo0OC0&t=52s
instead KClO3 is possible use NaClO3 in same ratio.
Deathunter88 - 25-3-2023 at 19:02
https://blog.skylighter.com/fireworks/2011/08/the-explosive-...
Per the comments:
They are filled with either white or black powder
-White powder is made of potassium chlorate, ammonium nitrate, sulfur, and powdered sugar.
-black powder is the same as above, except the powdered sugar is replaced with charcoal.
Laboratory of Liptakov - 30-3-2023 at 11:20
Mechas issue resolved here:
https://www.youtube.com/watch?v=BZqG3RGFQVc&t=45s
BJ68 - 2-4-2023 at 22:00
Thanks for the video....
Here (in German) is a different recipe:
https://illumina-chemie.de/viewtopic.php?p=91076#p91076
The user was in Bogota and bought mechas for analysis....see pictures in the thread.
In short the powder was a 1:1 mixture of sulfur with potassium chlorate and 3.9% red P and it was damped with water and a tiny amount of dextrin.
bj68
Laboratory of Liptakov - 2-4-2023 at 23:25
Great info, BJ68....
Used formula sounds a like madness...48,3 % KClO3
....S 47,8 % and P 3.9%. + water moisture XY %. However, all compounds are no hygroscopic and they use in wet clay conditions can be advantage. Which
decrease or hold sensitivity on acceptable level.
[Edited on 3-4-2023 by Laboratory of Liptakov]
Quieraña - 5-10-2023 at 11:52
Laboratory of liptakov on YouTube, links above, are DECENT. it seems vitamin c is a lesser known reductant that, in conjunction with chlorate salts,
behaves in a manner not far off from red phosphorus! The red in his mixture is iron oxide, believe it or not. I'm still stunned at the results. Wish I
knew this stuff 25 years ago, but hey, at least I still have my fingers! Thank you for sharing the recipe, I was boasting about you and just realized
I'm talking to you.
[Edited on 5-10-2023 by Quieraña]