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Author: Subject: Make mechas for playing Tejo
Bubbles
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[*] posted on 25-3-2023 at 10:44
Make mechas for playing Tejo


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 ;)
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Laboratory of Liptakov
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[*] posted on 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.




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[*] posted on 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.
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[*] posted on 30-3-2023 at 11:20


Mechas issue resolved here:
https://www.youtube.com/watch?v=BZqG3RGFQVc&t=45s




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BJ68
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[*] posted on 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
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[*] posted on 2-4-2023 at 23:25


Great info, BJ68....:cool:
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]




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[*] posted on 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 QuieraƱa]
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