DIN EN ISO 12625-16-2015 Tissue paper and tissue products - Part 16 Determination of optical properties - Opacity (paper backing) - Diffuse reflectance method (ISO 12625-16 2015) G.pdf

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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“2317125www.din.deDDIN EN ISO 12625-16Tissue paper and tissue products Part 16: Determination of optical properties Opacity (paper backing) Diffuse reflectance method(ISO 12625-16:2015);English version EN ISO 12625-16:2015,English translation of DIN EN ISO 12625-16:2015-05Tissue-Papier un

3、d Tissue-Produkte Teil 16: Bestimmung der optischen Eigenschaften Opazitt ber Papierstapel Diffuser Reflexionsfaktor (ISO 12625-16:2015);Englische Fassung EN ISO 12625-16:2015,Englische bersetzung von DIN EN ISO 12625-16:2015-05Papier tissue et produits tissues Partie 16: Dtermination des proprits o

4、ptiques Opacit sur fond papier Mthode par rflexion en lumire diffuse (ISO 12625-16:2015);Version anglaise EN ISO 12625-16:2015,Traduction anglaise de DIN EN ISO 12625-16:2015-05www.beuth.deDocument comprises 16 pagesIn case of doubt, the German-language original shall be considered authoritative.04.

5、15DIN EN ISO 12625-16:2015-05 2 A comma is used as the decimal marker. National foreword This document (EN ISO 12625-16:2015) has been prepared by Technical Committee CEN/TC 172 “Pulp, paper and board”, Working Committee WG 8 “Test methods for soft tissue papers” (Secretariat: DIN, Germany) in colla

6、boration 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 Committee Paper, Board and Pulps), Working Committee NA 074-02-05 AA Prfverfahren fr Tissue-Papier und

7、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 11664-1 DIN EN ISO 11664-1 ISO 11664-2 DIN EN ISO 11664-2 ISO 12625-7 DIN EN ISO 12625-7 ISO 12625-15

8、 DIN EN ISO 12625-15 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 186, Paper and board Sampling to determine average quality DIN EN

9、 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 Measurement of brightness and colour with D65/10 (outdoor daylight)

10、DIN EN ISO 12625-15, Tissue paper and tissue products Part 15: Determination of optical properties Measurement of brightness and colour with C/2 (indoor daylight) illuminant DIN ISO 5725-1, Accuracy (trueness and precision) of measurement methods and results Part 1: General principles and definition

11、s EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 12625-16 February 2015 ICS 85.060 English Version Tissue paper and tissue products - Part 16: Determination of optical properties - Opacity (paper backing) - Diffuse reflectance method (ISO 12625-16:2015) Papier tissue et produits tissues -

12、Partie 16: Dtermination des proprits optiques - Opacit sur fond papier - Mthode par rflexion en lumire diffuse (ISO 12625-16:2015) Tissue-Papier und Tissue-Produkte - Teil 16: Bestimmung der optischen Eigenschaften - Opazitt ber Papierstapel - Diffuser Reflexionsfaktor (ISO 12625-16:2015) This Europ

13、ean Standard was approved 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 con

14、cerning such national 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 i

15、nto its own language 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,

16、 Germany, Greece, 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 KOMIT

17、EE FR NORMUNG CEN-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 12625-16:2015 EContents PageForeword 3Introduction 41 Scope . 52 Normative references 53 Terms

18、and definitions . 54 Principle 65 Apparatus . 65.1 Reflectometer . 65.2 Reference standards . 75.3 Working standards 75.4 Black cavity 76 Sampling 77 Conditioning 78 Preparation of test pieces . 89 Procedure. 810 Calculation 911 Test report . 9Annex A (normative) Spectral characteristics of reflecto

19、meters for measuring luminous factor 10Annex B (informative) Precision 12Bibliography .142EN ISO 12625-16:2015 (E) DIN EN ISO 12625-16:2015-05 Foreword This document (EN ISO 12625-16:2015) has been prepared by Technical Committee ISO/TC 6 “Paper, board and pulps” in collaboration with Technical Comm

20、ittee 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, at the latest by August 2015, and conflicting national standards shall be withdrawn

21、 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 or all such patent rights. According to the CEN-CENELEC Internal Regulations, the

22、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 Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

23、 Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 12625-16:2015 has been approved by CEN as EN ISO 12625-16:2015 without any modification. EN ISO 12625 consi

24、sts 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 and apparent bulk density and bulk Part 4: Determination of tensile strength, stretch at break and tensile energy absorption P

25、art 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

26、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: Deter

27、mination of optical properties Opacity (paper backing) Diffuse reflectance method3EN ISO 12625-16:2015 (E) DIN EN ISO 12625-16:2015-05 IntroductionOptical 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 acc

28、ording to this part of ISO 12625, and the routine to be adopted for its calibration are specified in ISO 2469.The optical properties are related to the visual appearance of the material. Although optical properties are intrinsic properties of tissue paper, they are not functional properties.The opac

29、ity value depends on the principle used for its evaluation, and a method is to be chosen which most closely relates to the interpretation to be placed upon the results. The method described in this part of ISO 12625 is applicable when it is desired to measure that property of a tissue paper or tissu

30、e product which governs the extent to which one sheet visually obscures print on underlying sheets. It is not be confused with methods based on the reduction in a standard contrast by interposition of the paper opacity (white backing), formerly known as contrast ratio, nor with the assessment of the

31、 amount and condition of light penetrating a sheet (transparency or translucency).The calculation of opacity requires luminance-factor data obtained by measurement under specified conditions. The luminance factor depends on the conditions of measurement, and particularly on the spectral and geometri

32、c characteristics of the instrument used for its determination. This part of ISO 12625 is to be read in conjunction with ISO 2469.4EN ISO 12625-16:2015 (E) DIN EN ISO 12625-16:2015-05 1 ScopeThis part of ISO 12625 specifies the testing procedures for the instrumental determination of the opacity of

33、tissue paper or tissue products by diffuse reflectance using a paper backing.This part of ISO 12625 contains specific instructions for the preparation of test pieces of single-ply and multi-ply products, where special preparation/procedures might be necessary.It can be used to determine the opacity

34、of tissue paper and tissue products containing fluorescent whitening agents, provided the UV content of the radiation incident on the test piece has been adjusted to conform to that in the CIE illuminant C using a fluorescent reference standard provided by an authorized laboratory as described in IS

35、O 2470-1.This part of ISO 12625 is not applicable to coloured tissue paper and tissue products which incorporate fluorescent dyes or pigments.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For

36、 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 testing a

37、nd procedure for monitoring the atmosphere and conditioning of samplesISO 2469, Paper, board and pulps Measurement of diffuse radiance factorISO 2470-1, Paper, board and pulps Measurement of diffuse blue reflectance factor Part 1: Indoor daylight conditions (ISO brightness)3 Terms and definitionsFor

38、 the purposes of this document, the following terms and definitions apply.3.1reflectance factorRratio of the radiation reflected by a surface element of a body in the direction delimited by a given cone with its apex at the surface element to that reflected by the perfect reflecting diffuser under t

39、he same conditions of irradiationNote 1 to entry: The ratio is often expressed as a percentage.Note 2 to entry: The reflectance factor is influenced by the backing if the body is translucent.SOURCE: ISO 2471:20085EN ISO 12625-16:2015 (E) DIN EN ISO 12625-16:2015-05 3.2luminance factor (C)luminous re

40、flectance factorY(C/2null- valueRyreflectance factor or radiance factor defined with reference to the CIE illuminant C and the visual efficiency function V()Note 1 to entry: The visual efficiency function describes the sensitivity of the eye to light, so that the luminance factor (C) corresponds to

41、the attribute of visual perception of the reflecting surface.Note 2 to entry: For computational purposes, the function is identical with the CIE 1931 colour-matching function y .Note 3 to entry: The luminance factor (C) is also known as the Y(C/2)-value. In previous editions of this International St

42、andard, it was referred to as the luminous reflectance factor.SOURCE: ISO 2471:20083.3single-sheet luminance factor (C)R0luminance factor (C) of a single sheet of paper with a black cavity as backingSOURCE: ISO 2471:20083.4intrinsic luminance factor (C)Rluminance factor (C) of a layer or pad of mate

43、rial 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 2471:20083.5opacity (paper backing)ratio of the single-sheet luminance factor (C), R0, to the intrinsic luminance fac

44、tor (C), R, of the same sampleNote 1 to entry: Opacity is expressed as a percentage.SOURCE: ISO 2471:20084 PrincipleThe luminance factor of a single sheet of the tissue paper or tissue product over a black cavity and the intrinsic luminance factor of the tissue paper or tissue product are determined

45、. The opacity is calculated as the ratio of these two luminance factor values.5 Apparatus5.1 Reflectometer5.1.1 Reflectometer, having the geometric, spectral and photometric characteristics described in ISO 2469, calibrated in accordance with the provisions of ISO 2469 and equipped for the measureme

46、nt of luminance factor (C).The materials to be measured can contain fluorescent whitening agents. The reflectometer shall therefore be equipped with a radiation source adjusted to correspond to the CIE illuminant C. This should be achieved through the use of a fluorescent reference standard (5.2.2)

47、as described in ISO 2470-1.6EN ISO 12625-16:2015 (E) DIN EN ISO 12625-16:2015-05 5.1.2 In the case of a filter reflectometer, a filter that, in conjunction with the optical characteristics of the basic instrument, gives an overall response equivalent to the CIE tristimulus value Y of the CIE 1931 st

48、andard colourimetric system of the test piece evaluated for the CIE illuminant C.5.1.3 In the case of an abridged spectrophotometer, a function that permits calculation of the CIE tristimulus value Y of the CIE 1931 standard colourimetric system of the test piece, evaluated for the CIE illumunant C

49、using the weighting functions given in Annex A.5.2 Reference standardsThe reference standards for calibrating the instrument and the working standards should be used with sufficient regularity to ensure satisfactory performance.5.2.1 Non-fluorescent reference standard, for photometric calibration, issued by an authorized laboratory in accordance with the provisions of ISO 2469.5.2.2 Fluorescent reference standard, for use in adjusting the UV content of the radi