UNI EN ISO 13468-1 : 1998

Committees responsible
National foreword
Foreword
Method
1 Scope
2 Normative references
3 Definitions
4 Apparatus
5 Test specimens
6 Conditioning
7 Procedure
8 Expression of results
9 Precision
10 Test report
Annex
A (informative) Use of a compensation port to increase
    the efficiency of an integrating sphere
Tables
1 Measurements
2 Interlaboratory trials data
Figures
1 Schematic arrangements of the apparatus
A.1 Determination of p1 and p2 for the integrating
    sphere

Describes the determining of the total luminous transmittance, in the visible region of the spectrum, of planar transparent and substantially colourless plastics, with a single-beam photometer with a specified CIE standard light source and photodetector. Not for use with plastics containing fluorescent materials. Also applies to transparent moulding materials, films and sheets not in excess of 10 mm in thickness.