NEN ISO 489 : 1984
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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PLASTICS - DETERMINATION OF THE REFRACTIVE INDEX OF TRANSPARENT PLASTICS
12-01-2013
19-05-1999
Defines two methods for determining the refractive index of transparent plastics. 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 transparent 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.
| DocumentType |
Standard
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| PublisherName |
Netherlands Standards
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| Status |
Superseded
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| SupersededBy |
| Standards | Relationship |
| ISO 489:1999 | Identical |