ASTM D7836 Measurement of Yield Stress of Paints, Inks, and Related Liquid Materials

ASTM D7836 Measurement of Yield Stress of Paints, Inks, and Related Liquid Materials

ASTM D7836 covers three approaches for measuring the yield stress values of paints, inks, and related liquid materials. It is done by using a viscometer with a coaxial cylinder, cone/plate, or plate/plate geometry, a rheometer, and a viscometer with a vane spindle. The applied stress ramp on the material increases the yield stress of that material. The yield stress depends on the maximum torque value.

    Scope:

    ASTM D7836 method for stress measurements has been useful in establishing root causes of flow problems such as extreme orange peel and sagging etc. The stress ramp applied to the material exceeds the yield stress of the material. Torque increases the rotation of the spindle and the value of the torque is converted into a yield stress value. The yield stress value may be measured by discrete temperature, and in this way, the material can be tested within its packaging.

    Procedure:

    As per ASTM D7836 testing, the yield stress can be measured in three ways. Test Method A uses a viscometer with coaxial shear stress versus shear rate which determines the dynamic yield stress. “Dynamic” indicates that the material has been allowed to flow and that the yield stress value is mathematically calculated. Test Method B uses a stress rheometer to determine the yield stress value. As torque is applied to the spindle, the yield stress in the material increases. The stress reading at the onset of spindle rotation is the yield stress value for the material. Test Method C uses a rotational viscometer. The vane spindle is rotated slowly at a fixed speed. The yield stress value is determined when the torque value reaches a maximum.

    Video 01: Overview of viscosity and yield stress

    Result:

    Through the above-mentioned methods, the yield stress of paints, inks, and related liquid materials can easily be determined.

    Conclusion:

    ASTM D7836 method for stress measurements has been useful in establishing root causes of flow problems such as extreme orange peel and sagging etc.

    OUR SERVICES

    Core Materials Testing Services

    Metrology

    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

            ddd

            Let us combine our capabilities to achieve success!!

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