Light Reflectance
Light reflectance will vary depending on the texture and finish
color of the product specified.
The report below is based on
the Fellert Ultra finish in a white color.
|
Test report number |
401453 Report of color analysis1 |
Test date |
August 21, 2008 |
Project |
Color evaluation
ASTM E1477-98a |
|
|
- Color analysis was performed in general accordance with ASTM E1477-98a, “ASTM
E1477-98a (2008) Standard Test
Method for Luminous Reflectance Factor of
Acoustical Materials by Use of Integrating-Sphere Reflectometers.” The instrument
used for this analysis was an X-Rite SP 68 Sphere Spectrophotometer using the CIE
1964 (10°) standard observer with the specular component included.
- The average of three measurements taken from different locations on the white side of
the submitted sample is reported.
ASTM E1477 defines “luminous reflectance factor”
as the “CIE tristimulus value Y for the CIE 1964 (10°) standard observer and CIE
standard illuminant D 65 (daylight) or F 2 (cool white fluorescent).”
- ASTM E1477 does not define or determine “Light Reflectance.” Therefore, it is
assumed by the industry that light reflectance
is calculated by dividing the measured
CIE Y value by 100.
|
 |
|
