Norm

NEN-EN-ISO 489:1999 en

Kunststoffen - Bepaling van de brekingsindex

48,19

Over deze norm

Status Definitief
Aantal pagina's 11
Commissie Kunststoffen
Gepubliceerd op 01-05-1999
Taal Engels
Specifies two methods of test for determining the refractive index of transparent plastics, namely Method A: Refractometric method for measuring the refractive index of transparent cast, moulded or sheet materials by means of a refractometer. The method is recommended when great accuracy is required. It is not applicable to powdered or granulated materials. Method B: Immersion method (Becke line phenomenon) for determining the refractive index of powered or granulated transparent materials by means of a microscope and making use of the Becke line phenomenon. Monochromatic light should, in general, be used to avoid dispersion effects. the accuracy of this method is about the same as that of method A. It is applicable to isotropic translucent, coloured or opaque materials as well as anisotropic materials.

Details

ICS-code 83.080.10
Nederlandse titel Kunststoffen - Bepaling van de brekingsindex
Engelse titel Plastics - Determination of refractive index
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