What is needed to make black powder? (like what elements?)?

i have a big science final tomarrow and i don't know a few things.What is needed to make black powder? (like what elements?)?
according to Wikipedia:





The current standard for black powder manufactured by pyrotechnicians today is 75% potassium nitrate, 15% softwood charcoal and 10% sulfur; it appears to have been adopted as far back as 1780.[5] These ratios have varied over the centuries, and by country, but can be altered somewhat depending on the purpose of the powder.What is needed to make black powder? (like what elements?)?
Potassium Nitrate, Sulfur, and powered charcoal.





Potassium Nitrate - 70 to 80%


Sulfur - 10 to 15%


Powered Charcoal - 5 to 15%





Potasium Nitrate is a compound, Sulfur, and Charcoal are elements.





Black Powder and Grey Powder are distinguushed by the relative amounts of each component.





Uniform particle size is important.





If you are experimenting on this please be careful !!!
powder, and black dye
Charcoal, sulfur and salt peter