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ISO 868 Plastics and ebonite — Determination of indentation hardness by means of a durometer (Shore hardness)

Understanding ISO 868: Plastics and Ebonite — Determination of Indentation Hardness by Means of a Durometer (Shore Hardness)


At Kiyo R&D Center & Laboratory, we are committed to providing top-tier materials testing services, including the determination of indentation hardness for plastics and ebonite. One of the critical standards we adhere to in this domain is ISO 868, which outlines the methodology for measuring the Shore hardness of these materials. This blog will delve into the essentials of ISO 868 and how it is implemented in our laboratory to ensure accurate and reliable results.

ISO 868 Plastics and ebonite — Determination of indentation hardness by means of a durometer (Shore hardness)

What is ISO 868?

ISO 868 is an international standard that specifies a method for determining the indentation hardness of plastics and ebonite using a durometer, commonly referred to as Shore hardness. This standard is crucial for industries that rely on precise hardness measurements to ensure the quality and performance of their plastic and ebonite products.

Importance of Shore Hardness Testing

Shore hardness testing is a widely used method for assessing the resistance of a material to indentation. It provides valuable insights into the material’s properties, such as its rigidity, flexibility, and overall durability. The test is particularly important for applications where the material’s hardness directly impacts its performance and longevity.

Testing Procedure at Kiyo R&D Center & Laboratory

At Kiyo R&D Center & Laboratory, we follow the ISO 868 standard meticulously to ensure the highest level of accuracy in our hardness testing. Here’s a brief overview of the testing procedure:

  1. Sample Preparation: The plastic or ebonite sample is prepared according to the specifications of ISO 868. The sample’s surface must be smooth and free from any irregularities that could affect the test results.

  2. Durometer Calibration: Before testing, the durometer is calibrated to ensure its accuracy. This step is crucial for obtaining reliable and repeatable results.

  3. Hardness Measurement: The durometer is then used to measure the indentation hardness of the sample. The instrument’s indenter is pressed into the material, and the hardness value is read directly from the durometer’s scale. Depending on the material’s properties, different Shore scales (A or D) may be used.

  4. Data Analysis: The results are analyzed to determine the material’s hardness profile. This data can be used to assess the material’s suitability for specific applications or to compare it against industry benchmarks.

Applications of Shore Hardness Testing

Shore hardness testing is essential across various industries, including automotive, aerospace, consumer goods, and medical devices. For instance, in the automotive industry, the hardness of rubber components like tires and seals is critical for safety and performance. In the medical field, the hardness of plastic components in medical devices can affect their functionality and patient safety.

Why Choose Kiyo R&D Center & Laboratory?

Kiyo R&D Center & Laboratory is dedicated to providing precise and reliable materials testing services. Our adherence to international standards like ISO 868 ensures that our clients receive accurate and dependable data for their material properties. With our state-of-the-art equipment and expert team, we are equipped to handle a wide range of hardness testing needs.

By choosing Kiyo R&D Center & Laboratory for your Shore hardness testing, you can be confident in the quality and accuracy of our results. We continuously strive to exceed industry standards and provide our clients with the best possible testing services.


ISO 868 Plastics and ebonite — Determination of indentation hardness by means of a durometer (Shore hardness)


Understanding and implementing ISO 868 is crucial for accurate determination of indentation hardness in plastics and ebonite. At Kiyo R&D Center & Laboratory, we are committed to following these standards meticulously, ensuring that our clients receive the highest quality testing services. Whether you are in the automotive, aerospace, consumer goods, or medical industry, you can rely on us for precise and reliable Shore hardness testing.


1. What is Shore hardness testing?

Shore hardness testing measures the resistance of a material to indentation using a durometer. It provides insights into the material's rigidity, flexibility, and durability.

2. Why is Shore hardness testing important?

This testing is crucial for determining the material's suitability for various applications, ensuring quality and performance in industries like automotive, aerospace, and medical devices.

3. What materials can be tested for Shore hardness?

We test a wide range of materials, including various plastics and ebonite.