BS ISO 9416:2017 specifies a method for the calculation of light-scattering and light-absorption coefficients
based upon diffuse reflectance measurements made under the conditions specified in ISO 2469 using
the colour matching function Ȳ(λ) and CIE illuminant C.
It is emphasized that the strict evaluation of the light-scattering and light-absorption coefficients
requires conditions which cannot be achieved with the instrumentation specified here. The values
obtained by application of this document are dependent on the application of the Kubelka-Munk
equations, not to full reflectance data but to reflectance factor data obtained using the specified d/0°
geometry and a gloss trap.
The use of the method is restricted to white and near-white uncoated papers with an opacity less
than about 95 %. Paper that has been treated with a fluorescent dyestuff or that exhibits significant
fluorescence can only be dealt with if a filter with a cut-off wavelength of 420 nm is used to eliminate all
the fluorescence effect in the UVex(420) mode.
NOTE 1 The residual UV-level in the instrument may depend on whether the instrument is adjusted to UV(C)
or UV(D65) conditions prior to switching to the UVex(420) mode, but it is considered that this uncertainty in the
residual level can be ignored in the application of this document.
NOTE 2 Although this method is restricted to paper, it can be applied to pulp sheets, although this is not in
accordance with this document. In general, when pulps are tested, the light-absorption coefficient at 457 nm
corresponding to the ISO brightness value or the spectral absorption coefficients are of greater interest than the
weighted value standardized in this document.
Cross References:ISO 536:2012 ED3
ISO 187:1990
ISO 2469:2014 ED5
ISO 186:2002 (R07) Ed 4 ISO/TR 10688:2015
ISO 2471:2008
ASTM E308 - 08
All current amendments available at time of purchase are included with the purchase of this document. | File Size : | 1
file
, 840 KB |
| ISBN(s) : | 9780580906404 |
| Note : | This product is unavailable in Russia, Ukraine, Belarus |
| Number of Pages : | 20 |
| Product Code(s) : | 30325729, 30325729, 30325729 |
| Published : | 06/28/2017 |
| Same As : | BS ISO 9416:2017 |
