Items Needed in Preparation of Testing Five Steps We will show the five steps to determine the particle size distribution. 1. Select the sieve screen trays 2. Prep the specimen 3. Prepare the flow agent 4. Screen the specimen 5. Evaluate the Results Step 1: Select the Test Sieve Screens The particle size and the number of test screens used depends on the particle size distribution that is requested by the customer or use. It is optional to use two or six sieve trays. Test Method Particle Size Distribution of Recycled Rubber Test Method - Page 2 1. Clean set of 200 mm (8 inch) sieve trays to perform test 2. Six - 200 mm (8 inch) brass or stainless-steel sieve trays 3. One - 200 mm (8 inch) receiver pan 4. One - 200 mm (8 inch) lid 5. Digital scale with tare function, with a sensitivity of weighing at a minimum of 0.1 grams 6. Assortment of brushes a. Soft brass wire brush for materials that are 425 µm (40 mesh) and coarser b. A nylon bristle brush for cleaning sieves finer than 425 µm (40 mesh) 7. Glass or measuring cup, with a capacity of 500 cm3 (pint) 8. Glass wide-mouth jar with lid, with capacity of 500 cm3 9. Rubber balls or plastic rings (two per sieve tray) 10.Flow agent (magnesium silicate, silica, talc) 11.Tweezers to extract small pieces of fiber (if present) 12.Magnet 13.Shop vac 14.Clean rags
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