ISO 489 Plastics - Test for Refractive Index

EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of ISO 489 testing. This standard specifies two test methods for determining the refractive index of plastics.

Specifies the following methods:

• A refractometric method for measuring the refractive index of molded parts, cast or rolled sheets, or film, by means of a refractometer. It applies not only to isotropic transparent, translucent, colored or opaque materials, but also to anisotropic materials. The method is recommended when there is great accuracy.
• An immersion method to determine refraction (using the Becke line phenomenon) Index of powdered or granulated transparent materials by means of a microscope. Monochrome light can generally be used to avoid scattering effects. The accuracy of this method is approximately the same.

The refractive index is a key property that can be used to check purity and composition. For the identification of materials and the design of optical parts. The change in refractive index with temperature is the indication of the transition points of the materials.

EUROLAB assists manufacturers with ISO 489 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.