EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of ISO 48-8 testing. This standard specifies a method for determining the apparent hardness of vulcanized or thermoplastic rubber roll coatings, expressed as the Pusey and Jones indentation value.
The Pusey and Jones plastometer apparatus is used to measure the depth of penetration of a recess into the surface of the rubber under a certain force. The indentation value is not the same as the value measured by the international rubber hardness test method ISO 48-2, because in this method the rubber immediately adjacent to the indentation is pre-compressed. The Pusey and Jones indentation value is an inverse measurement of hardness, meaning the harder the rubber, the lower the Pusey and Jones indentation value.
The hardness of a platen coating has traditionally been determined on the finished platen because it is this hardness that is critical for correct operation of the platen in its final application. Therefore, the term "apparent hardness" is used to distinguish between the values obtained by the methods described in the various sections of this standard and the values that would be obtained for rubber if it were possible to use standard test methods for standard testing.
If possible, the test should be performed at standard laboratory temperature in accordance with ISO 23529. The product under test should be kept under the test condition for a sufficient time to reach temperature equilibrium with the test environment. Where this is not possible, the duration and conditions should be specified in the product specification.
EUROLAB assists manufacturers with ISO 48-8 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.
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