Color measurement
Color measurements are used to assess color changes induced by various stresses.
The following characteristics of a specimen are measured or calculated in an automatic spectral photometer with the help of the CIELAB table system:
- Transmittance
- Reflectance
- Yellowness index
- L*a*b* values
- Standard color values XYZ
- Delta E
 Automated test procedure |
 Automatic spectral photometer before the measurement |
| Test specimen | Optical sample sheet | ||
| Basic dimensions | 60 mm x 40 mm x d | ||
| Thikness | 2 mm | 3 mm | 4 mm |
