Standard Swedish standard · SS-ISO 9416:2018

Paper - Determination of light scattering and absorption coefficients (using Kubelka-Munk theory) (ISO 9416:2017, IDT)

Status: Valid

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Standard Swedish standard · SS-ISO 9416:2018

Paper - Determination of light scattering and absorption coefficients (using Kubelka-Munk theory) (ISO 9416:2017, IDT)
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Scope
This document 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.

Subjects

Pulps (85.040) Paper and board (85.060)


Buy this standard

Standard Swedish standard · SS-ISO 9416:2018

Paper - Determination of light scattering and absorption coefficients (using Kubelka-Munk theory) (ISO 9416:2017, IDT)
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Price: 875 SEK
standard ikon pdf

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Price: 875 SEK
standard ikon

Paper

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Product information

Language: English

Written by: Svenska institutet för standarder

International title:

Article no: STD-80004338

Edition: 3

Approved: 5/29/2018

No of pages: 24

Replaces: SS-ISO 9416:2009