DS/EN ISO 489
Plastics - Determination of refractive index
|Publication Date:||9 July 1999|
|ICS Code (Plastics in general):||83.080.01|
This standard specifies two test methods for determining the refractive index of plastics, namely: Method A: Refractive method for measuring the refractive index of moulded parts, cast or extruded sheet or film by means of a refractometer. Method B: Immersion method for determining the refrative index of powdered or granulated transparent materials by means of a microscope and making use of the Becke line phenomenon.