Trying to get some of the kinks out of my system, i have good ignition but slower then when i use commercial powder. Also have a little bit of white residue left over which i believe is unburned potassium nitrate.
Im using 99% potassium nitrate, 90% dusting sulphur, and home made charcoal using pine.
For my test batches im using 150 grains potassium nitrate/ 30 grains charcoal/20 sulphur.
Charcoal is ground with a mortar and pestle and passed through a sieve, the others are already in powder form however the potassium nitrate is about the size of salt particles and the sulphur is much smaller. All are combined and dry mixed, then wet mixed to the point where there is just a slight excess if moisture. I then dry it and break it up into 2f size grains.
My questions are how important is the charcoal size and should i be looking to filter it down to a certain micron? Also does hot water have an effect on solubility of the potassium nitrate? and does alcohol have a greater effect on solubility then water?