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Stiffness Tester

Stiffness Tester is used to measure the maximum force required to bend the test piece (paper or paperboard) to a specified angle. This extremely easy to use instrument has been manufactured to determine the resistance offered to a bending force (bending resistance) to a rectangular specimen, which is clamped along one side, measured under specified conditions. Bending resistance affects the product performance in many converting operations and end use application including packaging, printing, etc.


The Linux Stiffness Tester utilizes a two directional pendulum-type weighing system to evaluate material stiffness, flexural strength, resiliency and elasticity properties. Force is applied to the lower end of the specimen by a pair of rollers attached to the driving disc. The resulting torque tilts the pendulum from its vertical position and a Taber Stiffness Unit reading (g.cm) is taken when the pendulum mark aligns with the appropriate driving disc mark (71/2 or 15). Predetermined sample length, deflection angle & rate of loading provide ccurate and reproducible test results.

Standard Compliance:
  • ISO 2493
  • SCAN P29
  • TAPPI T 556

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