5.3 Brush any material that sticks to the bottom of the screen onto the next finer screen. Any material released by back brushing the sieve should be included in the measurement of the tray. 5.4 Record the mass to the nearest 0.1 g on the sieve data report. Record any mass less than 0.1 g as trace. 5.5 Repeat steps 5.1 to 5.4 until all sieves in the stack and the bottom collection pan have been emptied, weighed, and recorded. This gives the weight retained on each screen. 5.6 Total the numbers on the sieve analysis. The total should be within 2 grams of the starting specimen weight that included 100 g of rubber and the amount of flow agent used. If the sum of the weights is not within 2 grams of the initial sample weight, then retest. Test Method Particle Size Distribution of Recycled Rubber Test Method - Page 5 Step 5: Determine Weight Retained on Each Sieve and Record Results (Continued) We selected ASTM D5603-19 Standard particle size 2.0 mm (10 mesh) to use as the example for testing. Once tested, the results recorded should show that the top screen 3.4 mm (6 mesh) has zero material retained in the top screen 3.4 mm (6 mesh) and not more than 5% of material in the 2.0 mm (10 mesh) sieve tray/pan to pass. Tested 2.0 mm (10 Mesh)
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