标准编号：ISO 489:2022
中文名称：塑料 折射率的测定
英文名称：Plastics — Determination of refractive index
发布日期：2022-03
标准范围
This document specifies two test methods for determining the refractive index of plastics, namely:
— Method A: a refractometric method for measuring the refractive index of moulded parts, cast or extruded sheet or film, by means of a refractometer. It is applicable not only to isotropic transparent, translucent, coloured or opaque materials but also to anisotropic materials.
— Method B: an immersion method (making use of the Becke line phenomenon) for determining the refractive index of powdered or granulated transparent materials by means of a microscope. Monochromatic light, in general, is used to avoid dispersion effects.
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