How to Make Rosin Powder | Our Pastimes
How to Make Rosin Powder. Crush or smash the rock rosin pieces with the pestle until they begin to break apart. Be careful not to use too much pressure; you can cause pieces to fly out. Grind the smaller pieces of rock rosin in a circular motion using your pestle. Continue grinding until you have a fine powder. You don't want any chunks in your rosin powder.