1、May 2015 Translation by DIN-Sprachendienst.English price group 11No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 85
2、.080.20!%Bj:“2317123www.din.deDDIN EN ISO 12625-15Tissue paper and tissue products Part 15: Determination of optical properties Measurement of brightness and colour with C/2 (indoor daylight)illuminant (ISO 12625-15:2015);English version EN ISO 12625-15:2015,English translation of DIN EN ISO 12625-1
3、5:2015-05Tissue-Papier und Tissue-Produkte Teil 15: Bestimmung von optischen Eigenschaften Messung von Brightness und Farbe unter Lichtart C/2 (Tageslichtbedingungen inInnenrumen) (ISO 12625-15:2015);Englische Fassung EN ISO 12625-15:2015,Englische bersetzung von DIN EN ISO 12625-15:2015-05Papier ti
4、ssue et produits tissues Partie 15: Dtermination des proprits optiques Mesurage du degr de blancheur et de la couleur avec lilluminant C/2(lumire du jour lintrieur) (ISO 12625-15:2015);Version anglaise EN ISO 12625-15:2015,Traduction anglaise de DIN EN ISO 12625-15:2015-05www.beuth.deDocument compri
5、ses 17 pagesIn case of doubt, the German-language original shall be considered authoritative.04.15DIN EN ISO 12625-15:2015-05 2 A comma is used as the decimal marker. National foreword This document (EN ISO 12625-15:2015) has been prepared by Technical Committee CEN/TC 172 “Pulp, paper and board”, W
6、orking Committee WG 8 “Test methods for soft tissue papers” (Secretariat: DIN, Germany) in collaboration with Technical Committee ISO/TC 6 “Paper, board and pulps”. The responsible German body involved in its preparation was the DIN-Normenausschuss Papier, Pappe und Faserstoff (DIN Standards Committ
7、ee Paper, Board and Pulps), Working Committee NA 074-02-05 AA Prfverfahren fr Tissue-Papier und Tissue-Produkte. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 186 DIN EN ISO 186 ISO 187 DIN EN 20187 ISO 5725-1 DIN ISO 5725-1 ISO 11664
8、-1 DIN EN ISO 11664-1 ISO 11664-2 DIN EN ISO 11664-2 ISO 12625-7 DIN EN ISO 12625-7 National Annex NA (informative) Bibliography DIN EN 20187, Paper, board and pulps Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples DIN EN ISO 18
9、6, Paper and board Sampling to determine average quality DIN EN ISO 11664-1, Colorimetry Part 1: CIE standard colorimetric observers DIN EN ISO 11664-2, Colorimetry Part 2: CIE standard illuminants DIN EN ISO 12625-7, Tissue paper and tissue products Part 7: Determination of optical properties Measu
10、rement of brightness and colour with D65/10 (outdoor daylight) DIN ISO 5725-1, Accuracy (trueness and precision) of measurement methods and results Part 1: General principles and definitions EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 12625-15 February 2015 ICS 85.060 English Version Ti
11、ssue paper and tissue products - Part 15: Determination of optical properties - Measurement of brightness and colour with C/2 (indoor daylight) illuminant (ISO 12625-15:2015) Papier tissue et produits tissues - Partie 15: Dtermination des proprits optiques - Mesurage du degr de blancheur et de la co
12、uleur avec lilluminant C/2 (lumire du jour lintrieur) (ISO 12625-15:2015) Tissue-Papier und Tissue-Produkte - Teil 15: Bestimmung von optischen Eigenschaften - Messung von Brightness und Farbe unter Lichtart C/2 (Tageslichtbedingungen in Innenrumen) (ISO 12625-15:2015) This European Standard was app
13、roved by CEN on 3 January 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationa
14、l standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language
15、 and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hu
16、ngary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CE
17、NELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 12625-15:2015 EContents PageForeword 3Introduction 41 Scope . 52 Normative references 53 Terms and definitions . 54
18、 Principle 75 Apparatus . 75.1 Reflectometer or spectrophotometer 75.2 Reference standard for calibration of the instrument 75.3 Working standards 76 Calibration 87 Sampling 88 Conditioning 89 Preparation of test pieces . 910 Procedure. 910.1 General . 910.2 Measurement of C/2 brightness 910.3 Measu
19、rement of (C/2) colour 911 Calculation . 1011.1 C/2 brightness 1011.2 C/2 Colour 1011.2.1 Single values . 1011.2.2 Mean value . 1011.2.3 Dispersion of the results 1112 Test report 11Annex A (informative) Precision 12Bibliography .152EN ISO 12625-15:2015 (E) DIN EN ISO 12625-15:2015-05 Foreword This
20、document (EN ISO 12625-15:2015) has been prepared by Technical Committee ISO/TC 6 “Paper, board and pulps” in collaboration with Technical Committee CEN/TC 172 “Pulp, paper and board” the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, ei
21、ther by publication of an identical text or by endorsement, at the latest by August 2015, and conflicting national standards shall be withdrawn at the latest by August 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/
22、or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
23、 Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
24、 Endorsement notice The text of ISO 12625-15:2015 has been approved by CEN as EN ISO 12625-15:2015 without any modification.EN ISO 12625 consists of the following parts, under the general title Tissue paper and tissue products: Part 1: General guidance on terms Part 3: Determination of thickness, bu
25、lking thickness, apparent bulk density and bulk Part 4: Determination of tensile strength, stretch at break and tensile energy absorption Part 5: Determination of wet tensile strength Part 6: Determination of grammage Part 7: Determination of optical properties Measurement of brightness and colour w
26、ith D65/10 (outdoor daylight) Part 8: Water-absorption time and water-absorption capacity, basket-immersion test method Part 9: Determination of ball burst strength Part 11: Determination of wet ball burst strength Part 12: Determination of tensile strength of perforated lines Calculation of perfora
27、tion efficiency Part 15: Determination of optical properties Measurement of brightness and colour with C/2 (indoor daylight) Part 16: Determination of optical properties Opacity (paper backing) Diffuse reflectance method3EN ISO 12625-15:2015 (E) DIN EN ISO 12625-15:2015-05 IntroductionBrightness and
28、 colour measurement may be performed under various illumination and observation conditions. This part of ISO 12625 deals with C/2 conditions, which refer to an indoor daylight.D65/10 conditions (outdoor daylight) are considered in ISO 12625-7. Although both standards deal with brightness and colour,
29、 results obtained are usually different and do not correlate.Optical measurements are affected by the geometry of the instruments used and by the texture of the material. The design of the instrument to be used according to this part of ISO 12625, and the routine to be adopted for its calibration ar
30、e specified in ISO 2469 and ISO 2470-1.The optical properties are related to the visual appearance of the material in a specified illumination condition. Although optical properties are intrinsic properties of tissue paper, they are not functional properties.Brightness is not to be confused with the
31、 optical property called CIE-whiteness, which is based on reflectance data obtained over the full visible spectral range (VIS). In contrast, brightness is limited to the blue region of VIS (visible spectrum).As preferences for the properties to be specified can vary by country/market, three differen
32、t test methods for the determination of optical properties were developed: Part 7: Determination of optical properties Measurement of brightness and colour with D65/10 (outdoor daylight); Part 15: Determination of optical properties Measurement of brightness and colour with C/2 (indoor daylight); Pa
33、rt 16: Determination of optical properties Measurement of opacity (paper backing) Diffuse reflectance method.4EN ISO 12625-15:2015 (E) DIN EN ISO 12625-15:2015-05 1 ScopeThis part of ISO 12625 specifies testing procedures for the instrumental determination of brightness and colour of tissue paper an
34、d tissue products viewed in indoor daylight conditions. It also gives specific instructions for the preparation of test pieces (single-ply, multi-ply products) and for the optical measurements of products, where special precautions may be necessary.NOTE The properties called D65 brightness and colou
35、r are measured with an instrument adjusted to a much higher UV content than that specified in this part of ISO 12625. The measurements of D65 brightness and colour are described in ISO 12625-7.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this docu
36、ment and are indispensable for its application. 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 qualityISO 187, Paper, board and pulps
37、 Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samplesISO 2469, Paper, board and pulps Measurement of diffuse radiance factorISO 2470-1:2009, Paper, board and pulps Measurement of diffuse blue reflectance factor Part 1: Indoor daylig
38、ht conditions (ISO brightness)ISO 5631-1:2009, Paper and board Determination of colour by diffuse reflectance Part 1: Indoor daylight conditions (C/2)3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1reflectance factorRratio of the radiation refle
39、cted by a body to that reflected by the perfect diffuser under the same conditions of illumination and detectionNote 1 to entry: The reflectance factor is expressed as a percentage.Note 2 to entry: The reflectance factor is influenced by the backing if the body is translucent.5EN ISO 12625-15:2015 (
40、E) DIN EN ISO 12625-15:2015-05 3.2diffuse reflectance radiance factorRratio of the reflection from a body to that from the perfect reflecting diffuser under the same conditions of diffuse illumination and normal detectionNote 1 to entry: The ratio is often expressed as a percentage.SOURCE: ISO 2469:
41、20073.3intrinsic reflectance factorRdiffuse reflectance factor of a layer or pad of 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 factorSOURCE: ISO 2469:20073.4C/2 brightnessint
42、rinsic reflectance factor measured with a reflectometer having the characteristics described in ISO 2469, equipped with a filter or corresponding function having an effective wavelength of 457 nm (and a half bandwidth of 44 nm, and adjusted so that the UV content of the irradiation incident upon the
43、 test piece corresponds to that of the CIE illuminant CNote 1 to entry: The filter function is described more fully by the weighing function factors given in ISO 2470-1.3.5tristimulus valuesX, Y, Zamount of the three reference colour stimuli, in a given chromatic system, required to match the stimul
44、us consideredNote 1 to entry: In this part of 12625 as in ISO 5631-1, the CIE standard illuminant C and the CIE 1931 (2) standard observer are used to define the trichromatic system.Note 2 to entry: No subscript is applied to conform to the CIE convention that tristimulus values have no subscript wh
45、en the CIE 1931 (2) standard observer is used the subscript 10 is applied for tristimulus values that are obtained using the CIE 1964 (10) standard observer.SOURCE: ISO 5631-1:20093.6C/2 colourCIELAB colour space, L*, a*, and b* coordinates of the sample according to the CIELAB 1976 system, correspo
46、nding to the CIE standard illuminant C, described in ISO 11664-2 and the CIE 1964 supplementary standard colorimetric 2 observer, described in ISO 11664-1, determined by the measurements obtained under the conditions specified in ISO 5631-1Note 1 to entry: The quantity L* is a measure of the lightne
47、ss of the test piece, where L* = 0 corresponds to black and L* = 100 is defined by the perfect reflecting diffuser. Visually, the quantities a* and b* represent respectively the red-green and yellow-blue axes in colour space, such that +a* is a measure of the degree of redness of the test piece, -a*
48、 is a measure of the degree of greenness of the test piece, +b* is a measure of the degree of yellowness of the test piece, and -b* is a measure of the degree of blueness of the test piece.If both a* and b* are equal to zero, the test piece is grey.6EN ISO 12625-15:2015 (E) DIN EN ISO 12625-15:2015-
49、05 4 PrincipleA test piece is illuminated diffusely in a standard instrument and the light reflected normal to the surface is either allowed to pass through a defined optical filter, and then measured by a photodetector or measured by an array of photosensitive diodes, where each diode responds to a different effective wavelength. The brightness is then determined directly from the output from the photodetector or by calculation from the phot
