Spectrophotometric color measurements are offered at both the Florida and the Arizona test site. All European sites perform color measurements using a Minolta Spectrophotometer CM-3600d. The color transmittance or reflectance data can be recorded in several different color coordinate systems, including CIE Lab, HunterLab, CIE XYZ, CMC, yellowness or whiteness indices. Measurement parameters include Illuminants C, D65, F2 and others. We also offer 2° or 10° observers. Reflectance can be performed with the specular included or excluded. Portable spectro-colorimeters are available to perform field measurements. All tests are performed in accordance with industry standards such as ASTM E308, D2244, SAE J1545, ISO 105 B05, ISO 7724-2, ISO 7724-3, and DIN 6174. In addition, each of our laboratories participates in collaborative test service programs, available to the entire industry. The following table gives a full matrix of options for color measurements.
Availability of scale, attribute and geometric options for color measurements:
| |
Colorimetry |
Spectrophotometry |
| Spectral |
Array |
Scanning |
| LabScan |
UltraScan |
MiniScan
(Portable) |
OMA/ |
Beckman
5240 |
| |
| COLOR SCALES |
XYZ |
|
● |
● |
● |
● |
● |
| Yxy |
● |
● |
● |
● |
● |
| Lab |
● |
● |
● |
● |
● |
| CIELAB |
● |
● |
● |
● |
● |
| Rdab |
◻ |
◻ |
|
● |
✓ |
| ANLAB |
◻ |
◻ |
|
● |
✓ |
| |
| λ E, λ C, etc. |
Lab |
|
● |
● |
● |
● |
● |
| CIELAB |
● |
● |
● |
● |
● |
| Rdab |
◻ |
◻ |
● |
✓ |
✓ |
| FMC2 |
● |
● |
● |
✓ |
✓ |
| CMC |
✓ |
✓ |
|
✓ |
✓ |
| ILLUMINANT |
A |
|
● |
● |
● |
● |
● |
| C |
● |
● |
● |
● |
● |
| D65 |
● |
● |
● |
● |
● |
| F2 |
● |
● |
● |
✓ |
● |
| TL4 |
● |
● |
● |
✓ |
● |
| UL3 |
◻ |
◻ |
|
✓ |
● |
| D50 |
◻ |
◻ |
|
✓ |
● |
| D60 |
◻ |
◻ |
|
✓ |
● |
| D75 |
|
◻ |
|
✓ |
● |
| |
| OBSERVER |
2° |
|
● |
● |
● |
● |
● |
| 10° |
● |
● |
● |
● |
● |
| |
| INDICES |
WI(E313) |
|
● |
● |
● |
● |
✓ |
| WI(CIE) |
● |
● |
● |
✓ |
✓ |
| YI(D1925) |
● |
● |
● |
● |
✓ |
| YI(E313) |
● |
● |
● |
● |
✓ |
| MI 1 |
● |
● |
● |
✓ |
✓ |
| Z% |
● |
● |
● |
✓ |
✓ |
| Dom λ2 |
◻ |
◻ |
|
✓ |
✓ |
| K/S |
◻ |
◻ |
|
✓ |
✓ |
| Color Str. |
◻ |
◻ |
|
✓ |
✓ |
| Opt. Den. |
◻ |
◻ |
|
✓ |
✓ |
● Performed Routinely
✓ Requires Computer Manipulation
◻ Metamerism Index
1…..Metamerism Index
2….Dominant Wavelength