1、BSI Standards PublicationBS EN ISO 2811-1:2016Paints and varnishes Determination of densityPart 1: Pycnometer method (ISO2811-1:2016)BS EN ISO 2811-1:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO2811-1:2016. It supersedes BS EN ISO 2811-1:2011 which i
2、swithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee STI/10, Test methods for paints.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contra
3、ct. Users are responsible for its correctapplication. The British Standards Institution 2016. Published by BSI StandardsLimited 2016ISBN 978 0 580 87694 3ICS 87.040Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority
4、of theStandards Policy and Strategy Committee on 31 March 2016.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 2811-1 March 2016 ICS 87.040 Supersedes EN ISO 2811-1:2011English Version Paints and varnishes - Determination of density - Par
5、t 1: Pycnometer method (ISO 2811-1:2016) Peintures et vernis - Dtermination de la masse volumique - Partie 1: Mthode pycnomtrique (ISO 2811-1:2016) Beschichtungsstoffe - Bestimmung der Dichte - Teil 1: Pyknometer-Verfahren (ISO 2811-1:2016) This European Standard was approved by CEN on 23 January 20
6、16. 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 standards may be obtained
7、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 notified to the CEN-CEN
8、ELEC 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, Hungary, Iceland, Ireland, Ita
9、ly, 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 CEN-CENELEC Management Centre: Aven
10、ue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 2811-1:2016 EBS EN ISO 2811-1:2016EN ISO 2811-1:2016 (E) 3 European foreword This document (EN ISO 2811-1:2016) has been prepared by Technical C
11、ommittee 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 or by endorsement, at the
12、 latest by September 2016, and conflicting national standards shall be withdrawn at the latest by September 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 identifying any
13、 or all such patent rights. This document supersedes EN ISO 2811:1:2011. 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, Denm
14、ark, 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. Endorsement no
15、tice The text of ISO 2811-1:2016 has been approved by CEN as EN ISO 2811-1:2016 without any modification. BS EN ISO 2811-1:2016ISO 2811-1:2016(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 15 Temperature . 16 Apparatus . 27 Sampling 28 Procedure. 28.1 General
16、 . 28.2 Determination . 39 Calculation 410 Precision . 410.1 Repeatability limit, r . 410.2 Reproducibility limit, R . 411 Test report . 4Annex A (informative) Example of a calibration method 6Annex B (informative) Temperature variation 8Bibliography .10 ISO 2016 All rights reserved iiiContents Page
17、BS EN ISO 2811-1:2016ISO 2811-1:2016(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 through ISO technical committees. Each member body
18、 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 collaborates closely with the International Electrotec
19、hnical 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 criteria needed for the different types of ISO
20、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 of patent rights. ISO shall not be held respo
21、nsible 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 name used in this document is information given
22、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 Technical Barriers to Trade (TBT) see the following U
23、RL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for paints and varnishes.This third edition cancels and replaces the second edition (ISO 2811-1:2011), which has been technically revised wi
24、th the following changes:a) the information on the accuracy of the analytical balance (6.2) and the thermometer (6.3) was changed;b) a requirement was added that the sample shall be free from air bubbles;c) the spelling of pycnometer was corrected.ISO 2811 consists of the following parts, under the
25、general title Paints and varnishes Determination of density: Part 1: Pycnometer method Part 2: Immersed body (plummet) method Part 3: Oscillation method Part 4: Pressure cup methodiv ISO 2016 All rights reservedBS EN ISO 2811-1:2016INTERNATIONAL STANDARD ISO 2811-1:2016(E)Paints and varnishes Determ
26、ination of density Part 1: Pycnometer method1 ScopeThis part of ISO 2811 specifies a method for determining the density of paints, varnishes and related products using a metal or Gay-Lussac pycnometer.The method is limited to materials of low or medium viscosity at the temperature of test. The Hubba
27、rd pycnometer (see ISO 3507) can be used for highly viscous materials.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated reference
28、s, the latest edition of the referenced document (including any amendments) applies.ISO 1513, Paints and varnishes Examination and preparation of test samplesISO 3696, Water for analytical laboratory use Specification and test methodsISO 15528, Paints, varnishes and raw materials for paints and varn
29、ishes Sampling3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1densitymass divided by the volume of a portion of a materialNote 1 to entry: It is expressed in grams per cubic centimetre.4 PrincipleA pycnometer is filled with the product under tes
30、t. The density is calculated from the mass of the product in the pycnometer and the known volume of the pycnometer.5 TemperatureThe effect of temperature on density is highly significant with respect to filling properties, and varies with the type of product.For international reference purposes, it
31、is essential to standardize one test temperature, and (23,0 0,5) C is specified in this part of ISO 2811. It can be more convenient, however, to carry out comparative testing at some other agreed temperature, for example (20,0 0,5) C, as specified by relevant weights and measures legislation (see B.
32、2). ISO 2016 All rights reserved 1BS EN ISO 2811-1:2016ISO 2811-1:2016(E)The test sample and pycnometer shall be conditioned to the specified or agreed temperature, and it shall be ensured that the temperature variation does not exceed 0,5 C during testing.6 ApparatusOrdinary laboratory apparatus an
33、d glassware, together with the following.6.1 Pycnometer6.1.1 Metal pycnometer, with a volume of either 50 cm3or 100 cm3, a circular cross-section and a cylindrical form, made of a smoothly finished corrosion-resistant material with a snugly fitting lid having a hole in its centre.The inside of the l
34、id shall be concave (see Figure 1).or6.1.2 Glass pycnometer, with a volume in the range 10 cm3to 100 cm3(Gay-Lussac type) (see Figure 2).6.2 Analytical balance, accurate to 1 mg for pycnometers for less than 50 ml or accurate to 10 mg for 50 ml to 100 ml pycnometers.The accuracy of the balance requi
35、red depends on the size of the pycnometer used (see also 8.2).6.3 Thermometer, with an accuracy of 0,2 C.NOTE Typically, a thermometer with an accuracy of 0,2 C has a resolution of 0,05 C.6.4 Temperature-controlled chamber, capable of accommodating the balance, pycnometer and test sample and maintai
36、ning them at the specified or agreed temperature (see Clause 5), or water bath, capable of maintaining the pycnometer and test sample at the specified or agreed temperature.7 SamplingTake a representative sample of the product under test as described in ISO 15528.Examine and prepare the sample as de
37、scribed in ISO 1513. The sample shall be free from any air bubbles.8 Procedure8.1 GeneralCarry out a single determination on a fresh test sample.The pycnometer shall be calibrated. An example of a calibration method is given in Annex A.2 ISO 2016 All rights reservedBS EN ISO 2811-1:2016ISO 2811-1:20
38、16(E)Figure 1 Metal pycnometerFigure 2 Gay-Lussac pycnometer8.2 DeterminationIf working with a temperature-controlled chamber (see 6.4), put the pycnometer (6.1) and the test sample next to the balance (6.2) in the chamber maintained at the specified or agreed temperature.If working with a water bat
39、h (see 6.4) rather than a temperature-controlled chamber, put the pycnometer and the test sample in the water bath, maintained at the specified or agreed temperature.Allow approximately 30 min for temperature equilibrium to be reached.Using the thermometer (6.3), measure the temperature, tT, of the
40、test sample. Check throughout the determination that the temperature of the chamber or water bath remains within the specified limits.Weigh the pycnometer and record the mass, m1, to the nearest 10 mg for 50 cm3to 100 cm3pycnometers and to the nearest 1 mg for pycnometers less than 50 cm3in volume.F
41、ill the pycnometer with the product under test, taking care to avoid the formation of air bubbles. Place the lid or stopper of the pycnometer firmly in position and wipe off any excess liquid from the outside of the pycnometer with an absorbent material wetted with solvent; wipe carefully with cotto
42、n wool. ISO 2016 All rights reserved 3BS EN ISO 2811-1:2016ISO 2811-1:2016(E)Record the mass of the pycnometer filled with the product under test, m2.NOTE Liquid adhering to the ground-glass surfaces of a glass pycnometer or to the areas of contact between the lid and body of a metal pycnometer caus
43、es too high a balance reading. This source of error can be minimized by ensuring that the joints are firmly seated and by limiting air bubbles.9 CalculationCalculate the density, , of the product, in grams per cubic centimetre, at the test temperature, tT, using Formula (1): =mmVt21(1)wherem1is the
44、mass, in grams, of the empty pycnometer;m2is the mass, in grams, of the pycnometer filled with the product at the test temperature, tT;Vtis the volume, in cubic centimetres, of the pycnometer at the test temperature, tT, determined in accordance with Annex B.NOTE The result is not corrected for air
45、buoyancy because the uncorrected value is required by most filling-machine control procedures and the correction (0,001 2 g/cm3) is negligible in relation to the precision of the method.If the test temperature used is not the reference temperature, the density may be calculated using Formula (B.2).1
46、0 Precision10.1 Repeatability limit, r The value below which the absolute difference between two single test results, obtained on identical material by one operator in one laboratory using the same equipment within a short interval of time using the standardized test method, may be expected to lie,
47、with a 95 % probability, is 0,001 g/cm3for solvents, and 0,005 g/cm3for coating materials.10.2 Reproducibility limit, R The value below which the absolute difference between two test results, obtained on identical material by operators in different laboratories using the standardized test method, ma
48、y be expected to lie, with a 95 % probability, is 0,002 g/cm3for solvents, and 0,007 g/cm3for coating materials.11 Test reportThe test report shall include at least the following information:a) all details necessary to identify the product tested;b) a reference to this part of ISO 2811, i.e. ISO 281
49、1-1;4 ISO 2016 All rights reservedBS EN ISO 2811-1:2016ISO 2811-1:2016(E)c) the type of pycnometer used;d) the test temperature;e) the result of the density measurement, in grams per cubic centimetre, rounded to the nearest 0,001 g/cm3for pycnometers less than 50 cm3in volume and to the nearest 0,01 g/cm3for 50 cm3to 100 cm3pycnometers;f) any deviation from the test method specified;g) any unusual features (anomalies) observed during the test;h) the date of the test. ISO 2016 All rights reserved 5BS EN ISO 2811-1:2016
