SIST ISO 11475:2018
Paper and board -- Determination of CIE whiteness, D65/10 degrees (outdoor daylight)
Paper and board -- Determination of CIE whiteness, D65/10 degrees (outdoor daylight)
ISO 11475:2017 specifies the procedure to be used for determining the whiteness of papers and boards. The values obtained correspond to the visual appearance of white papers and boards with or without fluorescent whitening agents when they are viewed under the CIE D65 daylight standard illuminant. It is based on reflectance data obtained over the full visible spectral range (VIS) in contrast to the measurement of ISO brightness which is limited to the blue region of VIS.
In addition, it specifies a method for adjustment of the UV content to correspond to the CIE D65 daylight illuminant[10][11], insofar as results obtained when fluorescent whitening agents are present are dependent upon the UV content of the radiation falling upon the sample. It is specific for white fluorescent paper samples where the emission due to the fluorescent whitening agent (FWA) occurs in the blue region of the visible spectrum.
This method is not applicable to coloured papers containing fluorescent dyes.
ISO 11475:2017 should be read in conjunction with ISO 2469.
NOTE 1 This document is based on the CIE whiteness formula, published in CIE 15.3-2004[9].
NOTE 2 A related International Standard, ISO 11476, specifying the procedure for obtaining values corresponding to the appearance of these products under indoor illumination, has also been published.
Papier et carton -- Détermination du degré de blanc CIE, D65/10 degrés (lumière du jour extérieure)
Papir, karton in lepenka - Določanje beline po CIE, D65/10° (zunanja dnevna svetloba)
Ta dokument opredeljuje postopek, ki se uporablja za določanje beline papirja in plošč. Izmerjene vrednosti ustrezajo videzu belih listov in plošč s fluorescenčnimi belilnimi sredstvi ali brez njih, pri opazovanju s svetilom D65 po standardu CIE pri standardni dnevni svetlobi. Temelji na podatkih o odsevnosti, ki so pridobljeni prek celotnega vidnega spektralnega območja (VIS), v nasprotju z meritvami svetlosti po ISO, ki so omejene na območje modre barve vidnega spektralnega območja
Poleg tega določa metodo za prilagoditev UV-vsebnosti, tako da ustreza dnevni svetlobi CIE D65 [10][11], v kolikor so rezultati, ki so pridobljeni, ko so fluorescenčna belilna sredstva prisotna, odvisni od UV-vsebnosti sevanja, kateremu je vzorec izpostavljen. Je specifičen za vzorce belega fluorescenčnega papirja, pri katerih se emisija zaradi fluorescenčnega belilnega sredstva (FWA) pojavi v območju modre barve vidnega spektra.
Ta metoda se ne uporablja za barvni papir, ki vsebuje fluorescentne barve.
Ta dokument je treba brati skupaj s standardom ISO 2469.
OPOMBA 1 Ta dokument temelji na formuli za belino po CIE, ki je objavljena v standardu CIE 15.3-2004[9].
OPOMBA 2 Objavljen je tudi sorodni mednarodni standard ISO 11475, ki določa postopek za pridobivanje vrednosti, ki se ujemajo z videzom teh izdelkov pri notranjih svetlobnih pogojih.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2018
1DGRPHãþD
SIST ISO 11475:2011
3DSLUNDUWRQLQOHSHQND'RORþDQMHEHOLQHSR&,('ƒ ]XQDQMDGQHYQD
VYHWORED
Paper and board -- Determination of CIE whiteness, D65/10 degrees (outdoor daylight)
Papier et carton -- Détermination du degré de blanc CIE, D65/10 degrés (lumière du jour
extérieure)
Ta slovenski standard je istoveten z: ISO 11475:2017
ICS:
85.060 Papir, karton in lepenka Paper and board
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
INTERNATIONAL ISO
STANDARD 11475
Third edition
2017-05
Paper and board — Determination
of CIE whiteness, D65/10° (outdoor
daylight)
Papier et carton — Détermination du degré de blanc CIE, D65/10°
(lumière du jour extérieure)
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 3
5 Apparatus and equipment . 3
6 Calibration . 4
7 Sampling . 5
8 Preparation of test pieces . 5
9 Procedure. 5
10 Calculation and expression of results . 6
11 Precision . 7
12 Test report . 7
Annex A (normative) Spectral characteristics of reflectometers for determining
tristimulus values . 8
Annex B (normative) UV calibration service .13
Annex C (informative) Precision .15
Bibliography .16
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO’s adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: w w w . i s o .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 6, Paper, board and pulps.
This third edition cancels and replaces the second edition (ISO 11475:2004), which has been technically
revised. The major change is to allow for calculations to use ASTM E308 for instruments that have
bandpass correction and still maintain the non-bandpass-correction procedure. This third edition also
includes Precision Data.
iv © ISO 2017 – All rights reserved
INTERNATIONAL STANDARD ISO 11475:2017(E)
Paper and board — Determination of CIE whiteness,
D65/10° (outdoor daylight)
1 Scope
This document specifies the procedure to be used for determining the whiteness of papers and boards.
The values obtained correspond to the visual appearance of white papers and boards with or without
fluorescent whitening agents when they are viewed under the CIE D65 daylight standard illuminant.
It is based on reflectance data obtained over the full visible spectral range (VIS) in contrast to the
measurement of ISO brightness which is limited to the blue region of VIS.
In addition, it specifies a method for adjustment of the UV content to correspond to the CIE D65
[10][11]
daylight illuminant , insofar as results obtained when fluorescent whitening agents are present
are dependent upon the UV content of the radiation falling upon the sample. It is specific for white
fluorescent paper samples where the emission due to the fluorescent whitening agent (FWA) occurs in
the blue region of the visible spectrum.
This method is not applicable to coloured papers containing fluorescent dyes.
This document should be read in conjunction with ISO 2469.
[9]
NOTE 1 This document is based on the CIE whiteness formula, published in CIE 15.3-2004 .
NOTE 2 A related International Standard, ISO 11476, specifying the procedure for obtaining values
corresponding to the appearance of these products under indoor illumination, has also been published.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 186, Paper and board — Sampling to determine average quality
ISO 2469:2014, Paper, board and pulps — Measurement of diffuse radiance factor (diffuse reflectance factor)
ISO 4094, Paper, board and pulps — International calibration of testing apparatus — Nomination and
acceptance of standardizing and authorized laboratories
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
NOTE The symbols used here are selected to maintain consistency, wherever possible, with Reference [8].
3.1
reflectance factor
R
ratio of the radiation reflected by a body to that reflected by the perfect reflecting diffuser under the
same conditions
Note 1 to entry: The ratio is expressed as a percentage.
3.2
intrinsic reflectance factor
R
∞
reflectance factor (3.1) of a layer or pad of the material thick enough to be opaque, i.e. such that
increasing the thickness of the pad by doubling the number of sheets results in no change in the
measured reflectance factor
3.3
diffuse radiance factor
β
ratio of the diffusely reflected radiance of a body in a given direction to that of the perfect reflecting
diffuser under specified conditions of irradiation
Note 1 to entry: For fluorescent (luminescent) materials, the specified conditions of irradiation in this document
are for CIE Standard Illuminant D65 and the diffuse radiance factor is strictly the total radiance factor, β, which
contains two components, the reflected radiance factor, β , and the luminescent radiance factor, β , so that
R L
β = β + β
R L
Note 2 to entry: For non-fluorescent materials, the diffuse radiance factor, β, is simply the reflectance factor, R (3.1).
3.4
intrinsic diffuse radiance factor
β
∞
diffuse radiance factor (3.3) of a layer or pad of the material thick enough to be opaque, i.e. such that
increasing the thickness of the pad by doubling the number of sheets results in no change in the
measured diffuse radiance factor
Note 1 to entry: For fluorescent (luminescent) materials, the intrinsic diffuse radiance factor is, strictly speaking,
the total intrinsic radiance factor, β , which contains two components: the intrinsic reflected radiance factor,
∞
β , and the intrinsic luminescent radiance factor, β , so that
∞,R ∞,L
β = β + β
∞ ∞,R ∞,L
Note 2 to entry: For non-fluorescent materials, the intrinsic diffuse radiance factor, β , is simply the intrinsic
R
reflectance factor, R (3.2).
∞
3.5
CIE whiteness value
W
measure of whiteness derived from the CIE tristimulus values
Note 1 to entry: CIE whiteness is dimensionless and is expressed as whiteness units.
3.6
green tint value
red tint value
T
W10
measure of the deviation from whiteness of the test material towards the green or red region
Note 1 to entry: The tint value is dimensionless and is expressed as tint units.
Note 2 to entry: A positive value of T indicates a greenish tint and a negative value indicates a reddish tint.
W10
2 © ISO 2017 – All rights reserved
3.7
fluorescence component
F
measure of the extent to which the whiteness of the material is affected by excitation of the added
fluorescent whitening agent (FWA)
Note 1 to entry: The suffix 10 in the terms given in 3.5 to 3.7 is used to indicate that the value refers to the
CIE 1964 (10°) observer.
4 Principle
The diffuse radiance factor of the material is determined under standardized conditions after the
instrument has been adjusted so that a reference standard has the same CIE whiteness value as it
would have under CIE standard illuminant D65, and the CIE whiteness value and the tint value are
calculated. The fluorescence component of the whiteness is calculated from the difference between this
whiteness value and the whiteness value obtained when the fluorescence emission from the material is
eliminated, for instance, by the introduction of a sharp cut-off UV-absorbing filter into the light beams.
5 Apparatus and equipment
5.1 Reflectometer or spectrophotometer, having the geometric, spectral and photometric
characteristics described in ISO 2469:2014, Annex A, calibrated in accordance with the provisions
of ISO 2469:2014, Annex B, and equipped with a light source having an adequate UV content and a
means of adjusting the relative UV content so that the measured CIE whiteness value agrees with that
corresponding to the CIE standard illuminant D65.
For the measurement of reflectance factors with the fluorescence eff
...
INTERNATIONAL ISO
STANDARD 11475
Third edition
2017-05
Paper and board — Determination
of CIE whiteness, D65/10° (outdoor
daylight)
Papier et carton — Détermination du degré de blanc CIE, D65/10°
(lumière du jour extérieure)
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 3
5 Apparatus and equipment . 3
6 Calibration . 4
7 Sampling . 5
8 Preparation of test pieces . 5
9 Procedure. 5
10 Calculation and expression of results . 6
11 Precision . 7
12 Test report . 7
Annex A (normative) Spectral characteristics of reflectometers for determining
tristimulus values . 8
Annex B (normative) UV calibration service .13
Annex C (informative) Precision .15
Bibliography .16
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO’s adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: w w w . i s o .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 6, Paper, board and pulps.
This third edition cancels and replaces the second edition (ISO 11475:2004), which has been technically
revised. The major change is to allow for calculations to use ASTM E308 for instruments that have
bandpass correction and still maintain the non-bandpass-correction procedure. This third edition also
includes Precision Data.
iv © ISO 2017 – All rights reserved
INTERNATIONAL STANDARD ISO 11475:2017(E)
Paper and board — Determination of CIE whiteness,
D65/10° (outdoor daylight)
1 Scope
This document specifies the procedure to be used for determining the whiteness of papers and boards.
The values obtained correspond to the visual appearance of white papers and boards with or without
fluorescent whitening agents when they are viewed under the CIE D65 daylight standard illuminant.
It is based on reflectance data obtained over the full visible spectral range (VIS) in contrast to the
measurement of ISO brightness which is limited to the blue region of VIS.
In addition, it specifies a method for adjustment of the UV content to correspond to the CIE D65
[10][11]
daylight illuminant , insofar as results obtained when fluorescent whitening agents are present
are dependent upon the UV content of the radiation falling upon the sample. It is specific for white
fluorescent paper samples where the emission due to the fluorescent whitening agent (FWA) occurs in
the blue region of the visible spectrum.
This method is not applicable to coloured papers containing fluorescent dyes.
This document should be read in conjunction with ISO 2469.
[9]
NOTE 1 This document is based on the CIE whiteness formula, published in CIE 15.3-2004 .
NOTE 2 A related International Standard, ISO 11476, specifying the procedure for obtaining values
corresponding to the appearance of these products under indoor illumination, has also been published.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 186, Paper and board — Sampling to determine average quality
ISO 2469:2014, Paper, board and pulps — Measurement of diffuse radiance factor (diffuse reflectance factor)
ISO 4094, Paper, board and pulps — International calibration of testing apparatus — Nomination and
acceptance of standardizing and authorized laboratories
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
NOTE The symbols used here are selected to maintain consistency, wherever possible, with Reference [8].
3.1
reflectance factor
R
ratio of the radiation reflected by a body to that reflected by the perfect reflecting diffuser under the
same conditions
Note 1 to entry: The ratio is expressed as a percentage.
3.2
intrinsic reflectance factor
R
∞
reflectance factor (3.1) of a layer or pad of the material thick enough to be opaque, i.e. such that
increasing the thickness of the pad by doubling the number of sheets results in no change in the
measured reflectance factor
3.3
diffuse radiance factor
β
ratio of the diffusely reflected radiance of a body in a given direction to that of the perfect reflecting
diffuser under specified conditions of irradiation
Note 1 to entry: For fluorescent (luminescent) materials, the specified conditions of irradiation in this document
are for CIE Standard Illuminant D65 and the diffuse radiance factor is strictly the total radiance factor, β, which
contains two components, the reflected radiance factor, β , and the luminescent radiance factor, β , so that
R L
β = β + β
R L
Note 2 to entry: For non-fluorescent materials, the diffuse radiance factor, β, is simply the reflectance factor, R (3.1).
3.4
intrinsic diffuse radiance factor
β
∞
diffuse radiance factor (3.3) of a layer or pad of the material thick enough to be opaque, i.e. such that
increasing the thickness of the pad by doubling the number of sheets results in no change in the
measured diffuse radiance factor
Note 1 to entry: For fluorescent (luminescent) materials, the intrinsic diffuse radiance factor is, strictly speaking,
the total intrinsic radiance factor, β , which contains two components: the intrinsic reflected radiance factor,
∞
β , and the intrinsic luminescent radiance factor, β , so that
∞,R ∞,L
β = β + β
∞ ∞,R ∞,L
Note 2 to entry: For non-fluorescent materials, the intrinsic diffuse radiance factor, β , is simply the intrinsic
R
reflectance factor, R (3.2).
∞
3.5
CIE whiteness value
W
measure of whiteness derived from the CIE tristimulus values
Note 1 to entry: CIE whiteness is dimensionless and is expressed as whiteness units.
3.6
green tint value
red tint value
T
W10
measure of the deviation from whiteness of the test material towards the green or red region
Note 1 to entry: The tint value is dimensionless and is expressed as tint units.
Note 2 to entry: A positive value of T indicates a greenish tint and a negative value indicates a reddish tint.
W10
2 © ISO 2017 – All rights reserved
3.7
fluorescence component
F
measure of the extent to which the whiteness of the material is affected by excitation of the added
fluorescent whitening agent (FWA)
Note 1 to entry: The suffix 10 in the terms given in 3.5 to 3.7 is used to indicate that the value refers to the
CIE 1964 (10°) observer.
4 Principle
The diffuse radiance factor of the material is determined under standardized conditions after the
instrument has been adjusted so that a reference standard has the same CIE whiteness value as it
would have under CIE standard illuminant D65, and the CIE whiteness value and the tint value are
calculated. The fluorescence component of the whiteness is calculated from the difference between this
whiteness value and the whiteness value obtained when the fluorescence emission from the material is
eliminated, for instance, by the introduction of a sharp cut-off UV-absorbing filter into the light beams.
5 Apparatus and equipment
5.1 Reflectometer or spectrophotometer, having the geometric, spectral and photometric
characteristics described in ISO 2469:2014, Annex A, calibrated in accordance with the provisions
of ISO 2469:2014, Annex B, and equipped with a light source having an adequate UV content and a
means of adjusting the relative UV content so that the measured CIE whiteness value agrees with that
corresponding to the CIE standard illuminant D65.
For the measurement of reflectance factors with the fluorescence effect eliminated, the instrument
shall be equipped with a sharp cut-off, UV-absorbing filter having a transmittance not exceeding 5,0 %
at and below a wavelength of 410 nm and not exceeding 50 % at a wavelength of 420 nm. The cut-
off filter shall have characteristics such that a reliable reflectance value is obtained at 420 nm. The
reflectance value obtained at 420 nm shall then be considered for computational purposes to be the
value which applies at all lower wavelengths at which it is not possible to make any measurement.
For the measurement of fluorescent papers, photometric linearity up to a scale reading of at least 200 %
is necessary in the wavelength region corresponding to the fluorescent emission.
5.1.1 In the case of a filter reflectometer, pairs of filters giving the photoelectric detectors of the
reflectometer responses equivalent to the CIE tristimulus va
...
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