1、BSI Standards PublicationBS EN ISO 4630:2015Clear liquids Estimation ofcolour by the Gardner colourscaleBS EN ISO 4630:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 4630:2015. It supersedes BS EN ISO 4630-1:2004 and BS EN ISO 4630-2:2004 which are wit
2、hdrawn.The UK participation in its preparation was entrusted to Technical Committee STI/3, Paints, media and related products.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of
3、 a contract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 83751 7 ICS 87.060.20 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published unde
4、r the authority of the Standards Policy and Strategy Committee on 31 January 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 4630 December 2015 ICS 87.060.20 Supersedes EN ISO 4630-1:2004, EN ISO 4630-2:2004Engli
5、sh Version Clear liquids - Estimation of colour by the Gardner colour scale (ISO 4630:2015) Liquides clairs - valuation de la couleur au moyen de lchelle de couleur Gardner (ISO 4630:2015) Klare Flssigkeiten - Bestimmung der Farbe nach der Gardner-Farbskala (ISO 4630:2015) This European Standard was
6、 approved by CEN on 1 November 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 na
7、tional 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 lan
8、guage 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, Greec
9、e, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CE
10、N-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 4630:2015 EBS EN ISO 4630:2015EN ISO 4630:2015 (E) 3 European foreword This document (EN ISO 4630:2015) has bee
11、n prepared by Technical Committee ISO/TC 35 “Paints and varnishes“ in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” 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
12、or by endorsement, at the latest by June 2016, and conflicting national standards shall be withdrawn at the latest by June 2016. 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
13、identifying any or all such patent rights. This document supersedes EN ISO 4630-1:2004, EN ISO 4630-2:2004. 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, Cr
14、oatia, Cyprus, 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
15、 the United Kingdom. Endorsement notice The text of ISO 4630:2015 has been approved by CEN as EN ISO 4630:2015 without any modification. BS EN ISO 4630:2015ISO 4630:2015(E)Foreword iv1 Scope . 12 Normative references 13 Principle 14 Apparatus and materials 15 Sampling 26 Procedure. 27 Expression of
16、results 28 Precision . 28.1 General . 28.2 Repeatability limit, r 28.3 Reproducibility limit, R 38.4 Bias 39 Test report . 3Annex A (normative) Gardner colour standards 4Bibliography 6 ISO 2015 All rights reserved iiiContents PageBS EN ISO 4630:2015ISO 4630:2015(E)ForewordISO (the International Orga
17、nization 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 establis
18、hed 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
19、.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 th
20、e 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 paten
21、t 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
22、 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 Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationISO 4630 was prepared by Technical
23、 Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 10, Test methods for binders for paints and varnishes, in collaboration with ASTM D 01.34, Naval stores. It has been harmonized with ASTM D 1544-04, Standard test Method for Color of Transparent Liquids (Gardner Color Scale) and ASTM D 6166
24、-12, Standard Test Method for Color of Naval Stores and Related Products (Instrumental Determination of Gardner Color).This third edition of ISO 4630 cancels and replaces ISO 4630-1:2004 and ISO 4630-2:2004, which have been technically revised. The main changes are:a) both standards have been combin
25、ed into one standard;b) the spectrophotometric method (formerly described in ISO 4630-2:2004) is the only one standardized now;c) the original visual comparison of colours (formerly described in ISO 4630-1:2004) has been deleted, and the description of manufacture of the original Gardner colour stan
26、dards has been moved to Annex A.iv ISO 2015 All rights reservedBS EN ISO 4630:2015INTERNATIONAL STANDARD ISO 4630:2015(E)Clear liquids Estimation of colour by the Gardner colour scale1 ScopeThis International Standard specifies a method for estimating the colour of optically clear, yellow/brownish c
27、oloured liquid products by means of the Gardner colour scale using colour-measuring instruments. The method uses the Gardner colour scale described in Annex A.It is applicable to drying oils, varnishes and solutions of fatty acids, polymerized fatty acids, resins, tall oil, tall oil fatty acids, ros
28、in and related products. The results might be invalid if other products are tested.The method described provides a more precise way of measuring Gardner colour than a visual sample comparison using human eyes. It is applicable to products having colours from Gardner 1 to Gardner 18. The Gardner scal
29、e is not applicable to products with colours darker than 18. For products with colours lighter than Gardner 1 the method specified in ISO 6271 applies.2 Normative referencesThe following referenced documents, in whole or in part, are normally referenced in this document and are indispensable for its
30、 application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 3696, Water for analytical laboratory use Specification and test methodsISO 5725-2, Accuracy (trueness and precision) of me
31、asurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement methodISO 13632, Binders for paints and varnishes Rosin Sampling and sample preparation for colour measurementISO 15528, Paints, varnishes and raw materials for pai
32、nts and varnishes SamplingCIE Publication No. 15:2004, Colorimetry3 PrincipleThe colour of a liquid sample is measured using an instrument capable of measuring transmitted colour and reporting in Gardner colours or in a colour system that can be converted into Gardner colours.4 Apparatus and materia
33、ls4.1 Colour-measuring instrument, spectrophotometer capable of measuring transmitted colour (0/180 geometry) and reporting the results in the Gardner colour scale. If such an instrument is not available, one may be used which is capable of measuring transmitted colour and reporting in tristimulus v
34、alues using standard illuminant C and the 2 observer, described in CIE Publication No. 15:2004.4.2 Absorption cells, 10 mm light path length recommended, unless a different path length is specified by the instrument manufacturer or4.3 Glass tubes, 11 mm path length. Glass test tubes designed for a s
35、pecific instrument may be used. ISO 2015 All rights reserved 1BS EN ISO 4630:2015ISO 4630:2015(E)5 SamplingTake a representative sample of the product to be tested, as described in ISO 15528.In the case of rosin, take a representative sample, as specified in ISO 13632.6 ProcedureBaseline calibration
36、 of the instrument shall be performed following the instrument manufacturers recommendations.If the material to be tested is cloudy, first filter it (see Note). Then, using the same type of glass tube or absorption cell as used for the baseline calibration, fill the glass tube or absorption cell wit
37、h the product. Take care not to touch the measurement area of the glass tube or absorption cell.If the material shows any visual haziness, remove the haze e.g. by filtration, centrifugation, heating, ultrasonic treatment or any other suitable means (see Note).If the haziness cannot be removed, the m
38、easured value will be unreliable.Then, using the same type of glass tube or absorption cell as used for the baseline calibration, fill the glass tube or absorption cell with the product. Take care not to touch the measurement area of the glass tube or absorption cell.Avoid creating air bubbles when
39、filling the glass tube or absorption cell. If air bubbles are formed and remain trapped, remove them by heating, vacuum, ultrasonic treatment or any other suitable means (see Note).NOTE Some sample pre-treatments can change the colour.Insert the glass tube or absorption cell in the instrument and me
40、asure the Gardner colour, following the instrument manufacturers recommended procedure.Regular checks as per the instrument manufacturers recommendations should be carried out. These will normally be in the form of checks with certified reference materials.7 Expression of resultsReport the colour in
41、 Gardner colour units to the nearest tenth of a Gardner unit as given by the instrument.8 Precision8.1 GeneralThe precision of the test method was determined by interlaboratory testing in accordance with ISO 5725-2.Three different materials were tested by 13 laboratories.8.2 Repeatability limit, rTh
42、e repeatability limit r is the value below which the absolute difference between two single test results, each the mean of duplicates, obtained on identical material by one operator in one laboratory within a short interval of time using the standardized test method can be expected to lie with a pro
43、bability of 95 %.The repeatability for three repeated measurements, made in accordance with this International Standard and expressed as the repeatability limit r, is 0,1 Gardner units.2 ISO 2015 All rights reservedBS EN ISO 4630:2015ISO 4630:2015(E)The repeatability standard deviation among test re
44、sults, related to the above number by the factor 2,8, is 0,02 Gardner units.8.3 Reproducibility limit, RThe reproducibility limit R is the value below which the absolute difference between two test results, each the mean of duplicates, obtained on identical material by operators in different laborat
45、ories using the standardized test method can be expected to lie with a probability of 95 %.The reproducibility for three repeated measurements, made in accordance with this International Standard and expressed as the reproducibility limit R, is 0,5 Gardner units.The reproducibility standard deviatio
46、n among test results, related to the above number by the factor 2,8, is 0,18 Gardner units.8.4 BiasSince there is no accepted reference material suitable for determining the bias of the procedure in this test method, bias has not been determined.9 Test reportThe test report shall contain at least th
47、e following information:a) all details necessary to identify the product examined;b) a reference to this International Standard (ISO 4630);c) any type of pretreatment of the test sample;d) the result of the test as indicated in Clause 7;e) any deviation from the test method specified;f) any unusual
48、features (anomalies) observed during the test;g) the date of the test. ISO 2015 All rights reserved 3BS EN ISO 4630:2015ISO 4630:2015(E)Annex A (normative) Gardner colour standardsA.1 ReagentsIn preparing these standards, use only reagents of recognized analytical grade and only water of at least gr
49、ade 3 purity as defined in ISO 3696.A.1.1 Hydrochloric acid, diluted 1 + 17Mix 1 volume of concentrated hydrochloric acid, 38 % (by mass), = 1,19 g/ml, with 17 volumes of water.A.1.2 Potassium hexachloroplatinate solutionDissolve 790 mg of potassium hexachloroplatinate (K2PtCl6) in diluted hydrochloric acid (A.1.1) in a 100 ml one-mark volumetric flask. Warm the solution until all the potassium hexachloroplatinate has dissolved. Cool to 20 C, dilute to the mark with the same hydrochloric acid and mix well.The stock solution A.1.2 prepared
