Check out this explosive video tutorial on how to make a homemade fuse from potassium nitrate and sugar. It's fairly simple and straightforward, so you could easily make thousands of them.
You'll need a some potassium nitrate, some sugar and ordinary tissue paper. It's like rolling a joint, but you can't smoke this, not in the normal sense anyways.
This is one hell of a cheap homemade fuse for any of your bomb-making or firework display needs.
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