The table below shows the comparison data on K-20 vs K-20UVR vs K-75EUV in the accelerated weathering test.
Xenon Weather Meter / Suga Test Instrument XEL-7X-LHP model
Spectral Irradiance / 380 
Exposure time / 1000Hrs
Accumulated Spectral Irradiance / 136680KJ/m=380000 
Bkack-Pnel Temperature / 63ｰ
Humidity / 52%RH
Test Method / D65/10ｰ
|
250Hrs |
500Hrs |
750Hrs |
1000Hrs |
||||||||||||
L |
a |
b |
 E |
L |
a |
b |
E |
L |
a |
b |
E |
L |
a |
b |
E |
|
K - 20UVR |
0.0 |
-0.2 |
0.7 |
0.8 |
-0.1 |
-0.7 |
1.6 |
1.7 |
-0.3 |
-0.8 |
3.0 |
3.1 |
-1.3 |
-0.8 |
4.3 |
4.6 |
K - 75EUV |
0.0 |
-0.3 |
0.9 |
1.0 |
-0.1 |
-0.7 |
2.0 |
2.1 |
-0.1 |
-0.9 |
3.4 |
3.5 |
-1.1 |
-1.0 |
4.9 |
5.1 |
K - 20 |
-0.2 |
-0.5 |
1.5 |
1.5 |
-0.1 |
-0.9 |
2.9 |
3.0 |
-0.5 |
-1.1 |
4.5 |
4.6 |
-1.7 |
-1.1 |
6.0 |
6.3 |
