2. Labulk-0307 Plastic Materials Apparent Density Tester, Bulk Factor Tester and Pourability Tester Manual – Test Procedure – Apparent Density

•  Pour a 115 ± 5 cm³ sample into the funnel.
• Open the bottom of the funnel quickly and allow the material to flow freely into the cup.

NOTE 1: If caking occurs in the funnel, the material may be loosened with a small glass rod.

• After all the material has passed through the funnel, immediately scrape off the excess on the top of the cup with a straightedge without shaking the cup.
• Weigh the material in the cup to the nearest 0.1 g. Calculate the weight in grams of 1 cm³ of the material.

NOTE 2: To convert grams per cubic centimeter to ounces per cubic inch, multiply by 0.578.
To convert to grams per cubic inch multiply by 16.39. To convert grams per cubic centimeter to pounds per cubic foot, multiply by 62.43

NOTE 3: Apparent density figures are not comparable except on materials having the same specific gravity after molding or forming.

• Very fine materials that will bridge and not flow through the funnel may be poured lightly from a paper held approximately 38 mm (1.5 in.) above the opening of the measuring cup.