ASTM D1895 Apparent Density, Bulk Factor, and Pour ability of Plastic Materials

ASTM D1895 test method measures the apparent density, bulk factor, and pourability of plastic materials like molding powders and materials ranging from fine powders and granules to large flakes and cut fibers. The test method considers SI units as the standard.

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    The ASTM D1895 test method forms the standard for performance evaluation and packaging/fabrication uses of plastic materials like powders and granules. The fluffiness of the material and the volume change is measured. The handling properties and readiness of the material are determined, and delivery of uniform weights is ensured.

    Test Procedure:

    In ASTM D1895, a funnel is inserted into the measuring cup, and its end is closed to pour the sample into it. Then the end is opened, and the model flows down to the cup. Its weight is measured in grams, and the accumulated materials in the funnel are mixed with an anti-static agent to eliminate electrostatic charges. Moreover, the height of the material can be measured by dropping it in the measuring cylinder and using a scale to measure the size of the loose material.

    Specimen Size : 

    The specimen is taken as per the measurements specified, with the weight of 60 g in a cylinder of 61.89 cm² area.


    The following calculations are done in ASTM D1895 testing:

    V ꞊H × A
    For Apparent density ꞊ W/V
    Where V = volume occupied by the material in the measuring cylinder, cm3
    H = height of the material in the measuring cylinder, cm
    A = cross-sectional area of the measuring cylinder, (61.89 cm²)
    W = weight of the material in the cylinder (60 g)
    For Bulk factor ꞊D2 /D1
    Where: D2 = average density of the molded or formed specimen
    D1 = average apparent density of the plastic material before forming


    The ASTM D1895 test method forms the standard for performance evaluation and packaging/fabrication uses of plastic materials like powders and granules.


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