Measuring & Mixing Art Resin Start by adding desired amount of Part A into your mixing cup. Depending on your resin’s ratio, add your Part B on top of Part A. Mine is 1:1 so I use equal parts. Stir your resin slowly and carefully to reduce the amount of bubbles incorporated.(Real time mixing) Mix until there are no more “streaks”. Your resin will be thin and clear. (Video sped up: 7 minutes) TIP: For small molds use mixing stick to slowly drip the resin or pour slowly into larger cavities.