Reloading Primers: How To Make Primer Powder H48 (from Hatcher's Notebook)
You can safely combine 3 of the 4 main ingredients without great concern. When you add the 4th - go slowly and methodically. You never want to contain this material. As always - take all necessary safety precautions. I demonstrate the 'diaper method" to gently fold the ingredients together. Use regular computer printer paper.