Composition 56 Barium nitrate 32 Magnesium (lab grade powder) 25 Ammonium perchlorate 17 Parlon (or PVC)DescriptionMix Parlon with magnesium. Add 60 volume parts of acetone for Parlon, mix well and mix in the other ingredients. If PVC is used, add the correct amount of the solution in THF to the other ingredients.