NEN EN 12898 : 2001

Foreword
1 Scope
2 Symbols
3 Terms and definitions
4 Brief outline of the procedure to determine
  corrected emissivity
5 Spectral normal reflectance and transmittance
  measurements
6 Calculation of total normal reflectance, corrected
  emissivity and total normal transmittance
7 Diffuse reflectance measurements
8 Test report
Annex A (normative) Tables for determining total normal
        reflectance and total corrected emissivity
Annex B (informative) Procedures to improve the accuracy
        of spectral normal reflectance measurements
Bibliography

Specifies a procedure for determining the emissivity at room temperature of surface of glass and coated glass. The procedure, is based on spectrophotometric regular reflectance measurements at near normal incidence on non-infrared transparent materials.