modern gunpowder

preparation of gunpowder which we use for preparation step1 HNO3+H2SO4 WE BRING THERE TEMPERATURE DOWN UPTO 18C STEP 2 THEN WE soaked cotton in this solution for 1 hour. step 3 then by using drier we dry cotton and by using soda (cloth NANO3) to remove the acidity if any and neutralize the mixture then again by using drier dry the mixture.then we trnsfer the mixture to hydromachine in which water and acetate is present and then steam is passed through it which warmth the mixture.we allowd the mixture for 4 hours in the hyromachine this il evaporate the acetate than water is removed from it.than granule is formed. problem is that... after that what should we do with sulfur,charcoal in what percentage and at which occassion we can accuratally used these material to obtain our desirable gun powder.tell me about use of aceton its percentage because its also has use in our formula.tell me about whole mixing procedure and lead us in accurate direction.if there is any procedure and beneficial step which we forgotton.is there any role of nitroglycerin in our gun powder if yes then tell us about there use and step at which we can use it in our procedure.