#$%^&*AU2017101725A420180118.pdf#####ABSTRACT The present invention relates to a method for determining a characteristic of a mass of particulate plant material, the method comprising the step of determining the density of a mass of particulate plant material wherein preferably the mass of particulate plant material is prepared from a plant seed, from a coffee bean and/or by grinding a plant material. The invention also relates a system or apparatus for measuring the density of a mass of particulate plant material, wherein the system or apparatus comprises: an experimental vessel having a void configured to retain a mass of particulate plant material therein, volume determination means configured to determine the volume occupied by a mass of particulate plant material that has been disposed within the void of the experimental vessel. The present invention further relates to a method for determining the density of a mass of particulate plant material, the method comprising the steps of measuring the weight of a mass of particulate plant material, measuring the volume of the mass of particulate plant material, and calculating the density of the mass of particulate plant material as well as a method for setting a plant material grinder with respect to coarseness or fineness of the resultant grind, the method comprising the steps of: providing a plant material, grinding the plant material using a grind setting so as to provide a test batch of particulate plant material, assessing the density of the test batch of particulate plant material by the system/apparatus or the method of the invention, and adjusting the grinder setting if necessary so as to provide a target density for the particulate plant material.1/6 10 110 10 112y115 25 20 '122 120 25 30 30 125 125 130 40 FIG. 1A FIG. 1B
