Nitrocellulose is modern gunpowder, many confuse blackpowder and gunpowder but for the sake of convinience we have referenced black powder as gunpower on this site.
WARNING (Legal issue): The following procedure involves concentrated acid and should not be attempted
You will need:
- Concentrated Sulphuric acid
- An equal amout of concentrated Nitric acid
- Pure cotton
Simply dissolve the cotton in one acid, filter it out and repeat the process with the other acid.