{"id":7295,"date":"2025-07-30T14:43:33","date_gmt":"2025-07-30T06:43:33","guid":{"rendered":"https:\/\/www.qualitester.com\/?page_id=7295"},"modified":"2025-07-30T14:53:42","modified_gmt":"2025-07-30T06:53:42","slug":"paper-stiffness-tester-with-iso-2493-1-2","status":"publish","type":"page","link":"https:\/\/www.qualitester.com\/lt\/applications\/paper-stiffness-tester-with-iso-2493-1-2\/","title":{"rendered":"Paper Stiffness Tester"},"content":{"rendered":"

Complete Guide to Paper Stiffness Tester
\nISO 2493-1<\/small><\/h1>\n
\n

\"stiffnessUnderstanding ISO 2493-1 in Paper Stiffness Tester<\/h2>\n

Accurate measurement of paper and paperboard stiffness is essential for ensuring optimal material performance in packaging, printing, and other industrial applications. The ISO 2493-1<\/strong> standard specifies a reliable method for determining bending resistance, offering consistency and comparability across global quality control processes. This article outlines how to properly carry out testing according to ISO 2493 1 and highlights the importance of using the correct equipment, such as the WTD-01 lenkimo standumo testeris<\/strong><\/a> from Cell Instruments.<\/p>\n

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Why ISO 2493-1 Matters in Paper Tester<\/h2>\n

ISO 2493-1 provides a standardized method for measuring the bending resistance of paper and board<\/strong> by applying a force at a defined bending length (typically 50 mm or 10 mm) until the sample reaches a specific angle (15\u00b0 or 7.5\u00b0). This approach ensures uniformity and reproducibility, essential for quality control, product development, and supplier verification.<\/p>\n

Key benefits of using ISO 2493-1 include:<\/p>\n

    \n
  • Consistent data across laboratories<\/li>\n
  • Reliable comparison of material stiffness<\/li>\n
  • Enhanced control in converting and printing processes<\/li>\n<\/ul>\n

    For manufacturers, following ISO 2493-1 means higher product reliability and reduced failure rates in application.<\/p>\n

    \n

    Paper Stiffness Tester and the Taber Stiffness Test Method<\/h2>\n

    Svetain\u0117 Taber stiffness test method<\/strong> is a widely used approach for evaluating the flexural rigidity of paper and paperboard materials. It involves clamping a test piece and applying a force via a blunted knife edge at a fixed distance to bend the sample through a defined angle.<\/p>\n

    To comply with ISO 2493-1, a high-quality paper stiffness tester<\/strong> must feature:<\/p>\n

      \n
    • Accurate force sensors (\u00b15% under 100 mN, \u00b12% above)<\/li>\n
    • Precise control of bending angle (15\u00b0 or optional 7.5\u00b0)<\/li>\n
    • Adjustable clamp pressure to prevent slippage or deformation<\/li>\n
    • Repeatable sample positioning<\/li>\n<\/ul>\n

      Svetain\u0117 Cell Instruments WTD-01 Bending Stiffness Tester<\/strong> is fully compliant with ISO 2493 1 and designed for high-precision, user-friendly operation. It features an intelligent interface, automatic angle control, and robust clamping mechanisms, ensuring precise test execution.<\/p>\n

      \n

      Sample Preparation and Testing Procedures<\/h2>\n

      Proper preparation and conditioning are critical to obtain valid test results. Follow these steps according to ISO 2493 1:<\/p>\n

      Conditioning and Sampling<\/h3>\n
        \n
      • Condition specimens in line with ISO 187<\/strong>.<\/li>\n
      • Select samples per ISO 186<\/strong> for lot evaluation.<\/li>\n<\/ul>\n

        Cutting Test Pieces<\/h3>\n
          \n
        • Cut 10 test pieces in each principal direction (machine and\/or cross).<\/li>\n
        • Dimensions: (38.0 \u00b1 0.2) mm wide, at least 80 mm long for 50 mm bending length.<\/li>\n<\/ul>\n

          Testing Protocol<\/h3>\n
            \n
          1. Insert sample into the clamp ensuring correct alignment and minimal contact with hands.<\/li>\n
          2. Use a standard bending length of 50 mm (or 10 mm for low-stiffness materials).<\/li>\n
          3. Set the instrument to a 15\u00b0 bending angle<\/strong> (or 7.5\u00b0 for thick or sensitive samples).<\/li>\n
          4. Avoid bending or creasing the sample prior to the test.<\/li>\n
          5. Record force applied by the knife as it bends the sample.<\/li>\n<\/ol>\n

            Important<\/strong>: Use consistent clamping pressure and avoid reusing test pieces. High clamping force may result in artificially lower stiffness values.<\/p>\n