1、BSI Standards PublicationBS EN ISO 12625-7:2014Tissue paper and tissueproductsPart 7: Determination of optical properties Measurement of brightness and colourwith D65/10 (outdoor daylight)BS EN ISO 12625-7:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO
2、12625-7:2014. It supersedes BS EN ISO 12625-7:2007 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PAI/11, Methods of test for paper, board and pulps.A list of organizations represented on this committee can beobtained on request to its secretary.This pu
3、blication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 73912 5ICS 85.060; 85.080.20Compliance with a British Standard cannot confer
4、 immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 May 2014.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 12625-7 May 2014 ICS 85.060 Supersedes EN
5、 ISO 12625-7:2007English Version Tissue paper and tissue products - Part 7: Determination of optical properties - Measurement of brightness and colour with D65/10 (outdoor daylight) (ISO 12625-7:2014) Papier tissue et produits tissue - Partie 7: Dtermination des proprits optiques - Mesurage du degr
6、de blancheur et de la couleur avec lilluminant D65/10 (lumire du jour extrieure) (ISO 12625-7:2014) Tissue-Papier und Tissue-Produkte - Teil 7: Bestimmung der optischen Eigenschaften - Brightness und Farbmessung mit Lichtart D65/10 (Auentageslicht) (ISO 12625-7:2014)This European Standard was approv
7、ed by CEN on 17 April 2014. 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 national st
8、andards 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 and
9、 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, Hungar
10、y, 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-CENELE
11、C Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 12625-7:2014 EBS EN ISO 12625-7:2014EN ISO 12625-7:2014 (E) 3 Foreword This document (EN ISO 12625-7:2014) has been pre
12、pared by Technical Committee CEN/TC 172 “Pulp, paper and board” the secretariat of which is held by DIN, in collaboration with Technical Committee ISO/TC 6 “Paper, board and pulps“. This European Standard shall be given the status of a national standard, either by publication of an identical text or
13、 by endorsement, at the latest by November 2014, and conflicting national standards shall be withdrawn at the latest by November 2014. 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 responsibl
14、e for identifying any or all such patent rights. This document supersedes EN ISO 12625-7:2007. 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
15、, Czech 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 K
16、ingdom. Endorsement notice The text of ISO 12625-7:2014 has been approved by CEN as EN ISO 12625-7:2014 without any modification. BS EN ISO 12625-7:2014ISO 12625-7:2014(E) ISO 2014 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions
17、 . 14 Principle 35 Apparatus . 36 Calibration 47 Sampling 48 Conditioning 59 Preparation of test pieces . 510 Procedure. 510.1 General . 510.2 Measurement of D65 brightness . 510.3 Measurement of colour (D65/10) 511 Calculation 611.1 D65 brightness 611.2 Colour (D65/10) . 612 Test report . 7Annex A
18、(informative) Precision . 8Bibliography .11BS EN ISO 12625-7:2014ISO 12625-7:2014(E)ForewordISO (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 throu
19、gh 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 collabora
20、tes 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 cr
21、iteria 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
22、 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 n
23、ame used in this document is information given for the convenience of users and does not constitute an endorsement.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 principles in the Techni
24、cal Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationISO 12625-7 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, board and pulps, Subcommitt
25、ee SC 2, Test methods and quality specifications for paper and board, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).This second edition cancels and replaces the first edition (ISO 12625-7:2007), which has been technically revised.ISO 12625 consists
26、of the following parts, under the general title Tissue paper and tissue products: Part 1: 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
27、5: Determination of wet tensile strength; Part 6: Determination of grammage; Part 7: Determination 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: Determinati
28、on of ball burst strength; Part 11: Determination of wet ball burst strength; Part 12: Determination 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 Dete
29、rmination of optical properties Opacity (paper backing) Diffuse reflectance methodiv ISO 2014 All rights reservedBS EN ISO 12625-7:2014ISO 12625-7:2014(E)IntroductionBrightness and colour measurement may be performed under various illumination and observation conditions. This part of ISO 12625 deals
30、 with D65/10 conditions, which refer to an outdoor daylight.C/2 conditions (indoor daylight) are considered in ISO 12625-15. Although both international standards deal with brightness and colour, results obtained are usually different and do not correlate.Optical measurement are affected by the geom
31、etry 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, are specified in ISO 2469 and ISO 11475.The optical properties are related to the visual appearance of the
32、material. Therefore, although optical properties are intrinsic properties of tissue paper, they are not functional properties.Brightness shall not be confused with the optical property called CIE-whiteness that is based on reflectance data obtained over the full visible spectral range (VIS) in contr
33、ast to the measurement of brightness which is limited to the blue region of VIS.Due to the importance for some countries 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/
34、10 (outdoor daylight); 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 method ; ISO 2014 All rights reserved vBS EN ISO 12625-7:2014BS EN ISO 12625-7
35、:2014Tissue paper and tissue products Part 7: Determination of optical properties Measurement of brightness and colour with D65/10 (outdoor daylight)1 ScopeThis part of ISO 12625 specifies testing procedures for the instrumental determination of brightness and colour of tissue paper and tissue produ
36、cts viewed under outdoor 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 C/2 brightness and colour are meas
37、ured with an instrument adjusted to a much lower UV content than that specified in this part of ISO 12625. The measurements of C/2 brightness and colour are described in ISO 12625-15.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and a
38、re 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 Standard
39、atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samplesISO 2469:2007, Paper, board and pulps Measurement of diffuse radiance factorISO 5631-2:2008, Paper and board Determination of colour by diffuse reflectance Part 2: Outdoor daylight conditio
40、ns (D65/10 degrees)ISO 11475, Paper and board Determination of CIE whiteness, D65/10 degrees (outdoor daylight)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
41、 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.INTERNATIONAL STANDARD ISO 12625-7:2014(E) ISO 2014 All rights
42、 reserved 1BS EN ISO 12625-7:2014ISO 12625-7:2014(E)3.2diffuse (radiance) reflectance 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 perce
43、ntage.Note 2 to entry: Adapted from ISO 2469:2007, definition 3.5.3.3intrinsic 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 measur
44、ed reflectance factorSOURCE: ISO 2469:2007, definition 3.63.4D65 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 4
45、4 nm), and adjusted so that the UV content of the irradiation incident upon the test piece corresponds to that of the CIE standard illuminant D65Note 1 to entry: The filter function is described more fully by the weighing function factors given in ISO 2470-27.3.5tristimulus valuesX10,Y10,Z10amounts
46、of the three reference colour stimuli, in a given chromatic system, required to match the stimulus consideredNote 1 to entry: In ISO 5631-2 the CIE standard illuminant D65 and the CIE 1964 (10) standard observer are used to define the trichromatic system.Note 2 to entry: The subscript 10 is applied
47、to conform to the CIE convention that tristimulus units have the subscript 10 when the CIE 1964 (10) standard observer is used.SOURCE: ISO 5631-2:2008, definition 3.53.6colour (D65/10)L*, a* and b* values of the sample according to the CIELAB 1976 system, corresponding to the CIE standard illuminant
48、 D65, described in ISO 11664-2 and the CIE 1964 supplementary standard colorimetric observer, described in ISO 11664-1,2determined by measurement under the conditions specified in ISO 5631-2Note 1 to entry: The quantity L* is a measure of the lightness of the test piece, where L* = 0 corresponds to
49、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; -b* is a measure of the degree of blueness of the test piece; if both a* and b* are equal to zero, the test piec
