BS EN ISO 13468-1:2019 – TC:2020 Edition
$134.27
Tracked Changes. Plastics. Determination of the total luminous transmittance of transparent materials – Single-beam instrument
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 36 |
This document covers the determination of the total luminous transmittance, in the visible region of the spectrum, of planar transparent and substantially colourless plastics, using a single-beam photometer with a specified CIE Standard light source and photodetector. This document cannot be used for plastics which contain fluorescent materials.
This document is applicable to transparent moulding materials, films and sheets not exceeding 10 mm in thickness.
Total luminous transmittance can also be determined by a double-beam spectrophotometer as in ISO 13468-2. This document, however, provides a simple but precise, practical and quick determination. This method is suitable for use not only for analytical purposes but also for quality control.
Substantially colourless plastics include those which are faintly tinted.
Specimens more than 10 mm thick can be measured provided the instrument can accommodate them, but the results might not be comparable with those obtained using specimens less than 10 mm thick.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 22 | National foreword |
| 24 | European foreword |
| 26 | Foreword |
| 27 | 1 Scope 2 Normative references |
| 28 | 3 Terms and definitions 4 Apparatus |
| 30 | 5 Test specimens 6 Conditioning 7 Procedure 8 Expression of results |
| 31 | 9 Precision 10 Test report |
| 33 | Annex A(informative) Use of a compensation port to increase the efficiency of an integrating sphere |
| 35 | Bibliography |
