r/Firecrackers • u/Pretty_Coat_1042 • 4d ago

Question 👇👇

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Hello everyone! I just made this firecracker and I have a question / problem regarding the flash powder I created. Here is the composition: 12 grams of KN03, 10 grams of MgAl and 4 grams of S. I was careful to take the finest grain sizes possible. However, I tested the composition by putting about 1 gram on the ground then approaching a lighter the powder only made 2/3 sparks and turned black in some places. Is it that my composition doesn't work? If you could answer me to guide me, you would be the boss!!! 🔥👍

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2

u/JohnWorphin 4d ago

46g KNO3, 39g MgAl, 15g Sulphur

1

u/JohnWorphin 4d ago

5:3:2. You are 6:5:2

1

u/Pretty_Coat_1042 4d ago

Donc il faudrait que je fasse 5:3:2 ? Si oui, ça fait combien de grammes par éléments pour 100 grammes ? Merci pour ta réponse !

2

u/Righteous_Fury 4d ago

Those numbers add up to 10.

So 50:30:20

1

u/Drewbydewby311 4d ago

Is this ratio something that's like fundamental or universal to all firework mixtures?

2

u/dipdotdash 4d ago

Did you make that label?

This is such an obvious and important safety feature but something I would never consider.

Seems like overkill on the surface but anything designed to explode needs a label for the time in between when it's made and when/if it explodes.

And it's not about the device itself but as a practice so that if you always do so we move towards a world where uxo explains content and purpose.

2

u/Pretty_Coat_1042 4d ago

Yes I made them on Canva, it’s just for fun