The mill can accept up to approximately 4mL of material, although optimum grinding efficiency is usually achieved with a 2mL sample. The advantage of our mill is that the analyst can examine the sample after a 10-minute grind and if it is not fine enough, put it back on and grind for an additional 5-10 minutes depending on size to be achieved.Stretch Ground Corn Supply Farther | Purina Animal Nutrition,5 ounces (1,200 microns) = Very poor >5 ounces (>1,200 microns) = Disaster; Another option for particle size evaluation is to use the micron sieves, either on-farm or at a local feed mill. While the micron sieves is more involved, it provides greater accuracy compared to the flour sifter. Adjust your grinding process as needed based on results.Grinding: Particle Size and Extraction - COFFEE IQ,This is a Bimodal grind. It is necessary to clarify that for each particle larger than 100 microns, there are 100,000,000 particles smaller than 100 microns. The low-quality grinders have a wider grind distribution. In comparison, high-quality ones, industrial mills, produce a more homogeneous grind.