1、BSI Standards PublicationBS EN ISO 12625-15:2015Tissue paper and tissue productsPart 15: Determination of optical properties Measurement of brightness and colour with C/2 (indoor daylight) illuminantBS EN ISO 12625-15:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementati
2、on of EN ISO 12625-15:2015.The UK participation in its preparation was entrusted to Technical Committee PAI/11, Methods of test for paper, board and pulps.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include al
3、l the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 83152 2 ICS 85.060; 85.080.20 Compliance with a British Standard cannot confer immunity from legal obligations.Thi
4、s British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 12625-15 February 2015 ICS 85.060 English Version
5、 Tissue 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 tissue - Partie 15: Dtermination des proprits optiques - Mesurage du degr de blancheur et de la
6、couleur 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 a
7、pproved 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 natio
8、nal 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 langua
9、ge 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,
10、Hungary, 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-
11、CENELEC 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 EBS EN ISO 12625-15:2015Foreword This document (EN ISO 12625-15:2015) has been prepared by Technica
12、l 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, either by publication of an identical text or by endorsement, a
13、t 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/or CENELEC shall not be held responsible for identifying any
14、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 Republic, Denmark, Estonia, Finland, Former Yugoslav Republi
15、c 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. Endorsement notice The text of ISO 12625-15:2015 has been ap
16、proved by CEN as EN ISO 12625-15:2015 without any modification. EN ISO 12625-15:2015 (E)BS EN ISO 12625-15:2015ISO 12625-15:2015(E)Contents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 35 Apparatus . 35.1 Reflectometer or spectrophotometer 35
17、.2 Reference standard for calibration of the instrument 35.3 Working standards 36 Calibration 47 Sampling 48 Conditioning 49 Preparation of test pieces . 510 Procedure. 510.1 General . 510.2 Measurement of C/2 brightness 510.3 Measurement of (C/2) colour 511 Calculation 611.1 C/2 brightness . 611.2
18、C/2 Colour. 611.2.1 Single values 611.2.2 Mean value 611.2.3 Dispersion of the results . 712 Test report . 7Annex A (informative) Precision . 8Bibliography .11 ISO 2015 All rights reserved iiiBS EN ISO 12625-15:2015ISO 12625-15:2015(E)ForewordISO (the International Organization for Standardization)
19、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 repres
20、ented 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 develo
21、p 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/I
22、EC 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
23、 development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO p
24、rinciples in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationISO 12625-15 was prepared by European Committee for Standardization (CEN) Technical Committee CEN/TC 172 Pulp, paper and board, in collaboration with Technical Committee ISO/TC 6, Paper, boa
25、rd and pulps, Subcommittee SC 2, Test methods for quality specifications for paper and board, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).ISO 12625 consists of the following parts, under the general title Tissue paper and tissue products: Part 1:
26、General guidance on terms Part 3: Determination of thickness, bulking 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: Determinat
27、ion of optical properties Measurement of brightness and colour with 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: Determinatio
28、n of tensile strength of perforated lines Calculation of perforation 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 methodiv ISO 2015 All
29、rights reservedBS EN ISO 12625-15:2015ISO 12625-15:2015(E)IntroductionBrightness and 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
30、 considered in ISO 12625-7. Although both standards deal with brightness and colour, 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 accor
31、ding to this part of ISO 12625, and the routine to be adopted for its calibration are 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
32、 paper, they are not functional properties.Brightness is not to be confused with the 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 prefe
33、rences for the properties to be specified can vary by country/market, three different 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 op
34、tical properties Measurement of brightness and colour with C/2 (indoor daylight); Part 16: Determination of optical properties Measurement of opacity (paper backing) Diffuse reflectance method. ISO 2015 All rights reserved vBS EN ISO 12625-15:2015BS EN ISO 12625-15:2015Tissue paper and tissue produc
35、ts Part 15: Determination of optical properties Measurement of brightness and colour with C/2 (indoor daylight) illuminant1 ScopeThis part of ISO 12625 specifies testing procedures for the instrumental determination of brightness and colour of tissue paper and tissue products viewed in indoor daylig
36、ht 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 colour are measured with an instrument adjuste
37、d 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 document and are indispensable for its applic
38、ation. 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 Standard atmosphere for conditioning and
39、 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 daylight conditions (ISO brightness)ISO 5631-1:
40、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 reflected by a body to that reflected by the p
41、erfect 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.INTERNATIONAL STANDARD ISO 12625-15:2015(E) ISO 2015 All rights
42、reserved 1BS EN ISO 12625-15:2015ISO 12625-15:2015(E)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 percen
43、tage.SOURCE: ISO 2469:20073.3intrinsic 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 2469:20
44、073.4C/2 brightnessintrinsic 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 irradia
45、tion incident upon the 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, requir
46、ed to match the stimulus 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 value
47、s have no subscript when 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
48、 1976 system, corresponding 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
49、measure of the lightness 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* 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 degr
