Next the olives are crushed into a paste. The purpose of crushing is to tear the flesh cells to facilitate the release of the oil from the vacuoles. In our mill, crushing is done with a double-hammer double-grid hammermill. The hammermill crusher offers a continuous and clean method. The crushing is done quickly, resulting in less heat build-up and exposure to oxygen than with stone mills. The double-hammer double-grid setup allows us to decrease the bitterness sometimes found when using traditional hammermills. The mill rotates much more slowly than traditional hammermills and the size of the grids can be adjusted to optimize the crushing process based on the characteristics of the olives.