Elrepho 3000
D65 brightness - The intrinsic reflectance factor measured at an
effective wavelength of 457nm under the conditions specified in
SCAN-P3 when the UV-content of the illumination has been
adjusted to conform to the D65-illuminant as specified in SCAN-P
66.
Light-scattering coefficient - A measure of the ability of the
material to scatter light.
Light-absorption coefficient - A measure of the ability of the
material to absorb light.
Appendix A
Definitions (cont)
Colour (C/2
°
) - The L*, a* and b* values of the sample according
to the CIELAB 1976 system, corresponding to the CIE 1931
standard observer and the CIE illuminant C, determined by
measurement under the conditions specified in SCAN-P 133X.
Colour (D65/10
°
) - The L*, a* and b* values of the sample
according to the CIELAB 1976 system, corresponding to the CIE
1964 standard observer and the CIE illuminant D65, determined by
measurement under the conditions specified in SCAN-P 136X.
Helmholtz Coordinate - (Newsprint shade) The L*, a* and b*
values of the sample according to the CIELAB 1976 system, or
alternatively, the Y-value, dominant wavelength and excitation
purity of the sample, corresponding to the CIE 1931 standard
observer and the CIE illuminant C, determined by measurement
under the conditions specified in SCAN-P 133X.
CIE-whiteness - A measure of the whiteness derived from the CIE
tristimulus values, corresponding to the CIE 1964 standard observer
and the CIE illuminant D65, determined under the conditions
specified in SCAN-P 66.
64 Datacolor International
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