ISO 13468-2:1999 PDF

Scope: This part of ISO 13468 covers the determination of the total luminous transmittance, in the visible region of the spectrum, of planar transparent and substantially colourless plastics, using a double-beam scanning spectro-photometer. This part of ISO 13468 cannot be used for plastics which contain fluorescent materials. This part of ISO 13468 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 single-beam instrument as in part 1 of this International Standard. NOTE 2 Substantially colourless plastics include those which are faintly tinted. NOTE 3 Specimens more than 10 mm thick may be measured provided the instrument can accommodate them, but the results may not be comparable with those obtained using specimens less than 10 mm thick.

ISO 13468-2:1999 Referenced Document

ISO 291:1997 Plastics - Standard atmospheres for conditioning and testing
ISO 5725-1:1994 Accuracy (trueness and precision) of measurement methods and results - Part 1: General principles and definitions
ISO 5725-2:1994 Accuracy (trueness and precision) of measurement methods and results - Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
ISO 5725-3:1994 Accuracy (trueness and precision) of measurement methods and results - Part 3: Intermediate measures of the precision of a standard measurement method
ISO/CIE 10526:1999 CIE standard illuminants for colorimetry*， 1999-06-03 Update
ISO/CIE 10527:1991 CIE standard colorimetric observers

2021 ISO 13468-2:2021 Plastics — Determination of the total luminous transmittance of transparent materials — Part 2: Double-beam instrument
1999 ISO 13468-2:1999 Plastics - Determination of the total luminous transmittance of transparent materials - Part 2: Double-beam instrument