标准编号：ISO 13468-1:2019
中文名称：塑料 透明材料光透射率总量的测定 第1部分： 单束发射仪器
英文名称：Plastics — Determination of the total luminous transmittance of transparent materials — Part 1: Single-beam instrument
发布日期：2019-06
标准范围
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.
NOTE 1 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.
NOTE 2 Substantially colourless plastics include those which are faintly tinted.
NOTE 3 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.
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