The density of Plastics by the Density-Gradient Technique ASTM D1505

The density of Plastics by the Density-Gradient Technique ASTM D1505

The standard method ASTM D1505 determines the density of plastic material. This test method involves measuring the level to which a test specimen sinks in a liquid column exhibiting a density gradient. The values expressed in SI units should be considered the standard.


    The standard test method, Density of Plastics by the Density-Gradient Technique ASTM D1505, determines the density of plastic materials. This test procedure is intended to produce findings that are accurate to within 0.05 percent. The density of a solid is a readily quantifiable attribute that is widely used to track physical changes in a sample, as a measure of sample uniformity, and as a means of identification.

    Test Procedure:

    ASTM D1505 wet specimens are placed in tubes and are required to reach equilibrium. Then thin films are required to settle, and the height of specimens is measured by cathetometer; after that, the samples are removed by means of a clock motor. The procedure should be performed at a low rate so that density remains undisturbed.

    Specimen size

    Specimen thicknesses should range from 0.025 to 0.051 mm (0.001 to 0.002 in.).


    Density at x = a +[(x – y)(b – a)/(z – y)]
    a and b = densities of the two standard floats,
    y and z = distances of the two standard
    x = distance of unknown above the same arbitrary


    The average density of three representative test specimens is reported as D23C, in grams per cubic centimeter.


    Core Materials Testing Services


    A variety of microscopy and spectroscopy tools available for precise measurements from the nano to the meter scale.

    Metrology Testing Services POPULAR TESTS:

    TEM SIMS Profilometry

    Materials Testing

    ASTM and ISO standard and custom chemical, mechanical, thermal, corrosion tests, etc. for all materials metals, ceramic or polymers.

    Materials Testing Services POPULAR TESTS:

    Nondestructive Testing Electrical Testing Chemistry Analysis

    Product Testing

    Thousands of tests for product quality and reliability under heat, humidity, temperature shock, vibration, drop, electrostatic discharge.

    Product Testing Services POPULAR TESTS:

    Vibration Testing Humidity Testing Accelerated Aging

    Looking for Material Testing?

    We have already delivered 10000+ Material Test results to top companies

      Send us a request

        Process for testing

          STEP 01

          You share material and testing requirements with us


          STEP 02

          We ensure your sample pick-up in an ensured manner


          STEP 03

          We deliver test report to your inbox

          Let’s work together!

          Share your testing requirements with us and we will be happy to assist you.

          ddd Just share your testing requirements and leave the rest on us!
          • Free, no-obligation consultation
          • Guaranteed confidentiality
          • Quick turnaround time
          • Hassle-free process

            idea icon
            Want to connect with an expert before you leave?