In this video, I will show you how to use two acids, nitric acid and sulfuric acid, to make flash cotton or nitrocellulose, which I have used in Harry Potter's fireball wands or flamethrower, in the easiest way. You can use paper instead of cotton, in which case you will have flash paper.
When using these two acids, be very careful and observe the safety measures. Be sure to use gloves and a mask and never try it in a closed space.
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