Refractive index of plastics

A test based on the ISO 489 standard for measuring the refractive index of molded plastic parts, casts, or extruded sheets or films. Testing is performed using a refractometer, and the results can be used, for example, to verify purity and composition or to identify different plastic materials.

The test is suitable for isotropic transparent, translucent, colored, and anisotropic materials. The method is recommended when a high level of accuracy is required.

Powdered or granulated materials are not suitable samples for this analysis, but we do also offer a test for determining the refractive index of powders.