1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 2811-1:2011Paints and varnishes Determination of densityPart 1: Pyknometer method (ISO2811-1:2011)Copyright European Committee for Standardization Provided by IHS under
2、 license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 2811-1:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO2811-1:2011. It supersedes BS EN ISO 2811-1:2001 which iswithdrawn.The UK participation i
3、n 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 contract. Users are responsible for its
4、 correctapplication. BSI 2011ISBN 978 0 580 66280 5ICS 87.040Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 March 2011.Amendments issued since publicationDate
5、Text affectedCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 2811-1 March 2011 ICS 87.040 Supersedes EN ISO 2811-1:2001En
6、glish Version Paints and varnishes - Determination of density - Part 1: Pyknometer method (ISO 2811-1:2011) Peintures et vernis - Dtermination de la masse volumique - Partie 1: Mthode pycnomtrique (ISO 2811-1:2011) Beschichtungsstoffe - Bestimmung der Dichte - Teil 1: Pyknometer-Verfahren (ISO 2811-
7、1:2011) This European Standard was approved by CEN on 19 February 2011. 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 bibliograp
8、hical references concerning 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 responsibili
9、ty of a CEN member into 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, France, Germany, Greece, H
10、ungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Ce
11、ntre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 2811-1:2011: ECopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or
12、networking permitted without license from IHS-,-,-BS EN ISO 2811-1:2011EN ISO 2811-1:2011 (E) 3 Foreword This document (EN ISO 2811-1:2011) has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes“ in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” the secret
13、ariat 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 September 2011, and conflicting national standards shall be withdrawn at the latest by September 2011. Attention is d
14、rawn 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. This document supersedes EN ISO 2811-1:2001. According to the CEN/CENELEC Internal Regulations, the
15、national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherla
16、nds, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 2811-1:2011 has been approved by CEN as a EN ISO 2811-1:2011 without any modification. Copyright European Committee for Standardization Provided by IHS un
17、der license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 2811-1:2011ISO 2811-1:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv 1 Scope1 2 Normative references1 3 Terms and definitions .1 4 Principle .1 5 Temperature.2 6 Appara
18、tus.2 7 Sampling 2 8 Procedure.2 8.1 General .2 8.2 Determination 3 9 Calculation .4 10 Precision 4 10.1 Repeatability limit, r 4 10.2 Reproducibility limit, R4 11 Test report5 Annex A (informative) Example of a calibration method 6 Annex B (informative) Temperature variation8 Bibliography10 Copyrig
19、ht European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 2811-1:2011ISO 2811-1:2011(E) iv ISO 2011 All rights reservedForeword ISO (the International Organization for Standardization)
20、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
21、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. International Standards are
22、drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International
23、 Standard requires approval by at least 75 % of the member bodies casting a vote. 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. ISO 2811-1 was prep
24、ared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for paints and varnishes. This second edition cancels and replaces the first edition (ISO 2811-1:1997), which has been technically revised. The main changes are the following. a) The unit for the den
25、sity has been changed from grams per millilitre to grams per cubic centimetre, because this is the more common SI unit. b) The determination in duplicate has been changed to a single determination. c) The information on calibration procedure has been changed to an example only and the status of Anne
26、x B has been changed from normative to informative. d) The Hubbard pyknometer has been deleted because it is not used for paints and varnishes and their raw materials, but for bitumen and putty only (see ISO 3507). e) The dust-proof container has been deleted because it is not used in practice. f) T
27、he precision data has been updated by an interlaboratory test. g) The normative references have been updated. ISO 2811 consists of the following parts, under the general title Paints and varnishes Determination of density: Part 1: Pyknometer method Part 2: Immersed body (plummet) method Part 3: Osci
28、llation method Part 4: Pressure cup method Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 2811-1:2011INTERNATIONAL STANDARD ISO 2811-1:2011(E) ISO 2011 All rights rese
29、rved 1Paints and varnishes Determination of density Part 1: Pyknometer method 1 Scope This part of ISO 2811 specifies a method for determining the density of paints, varnishes and related products using a metal or Gay-Lussac pyknometer. The method is limited to materials of low or medium viscosity a
30、t the temperature of test. The Hubbard pyknometer (see ISO 3507) can be used for highly viscous materials. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, t
31、he latest edition of the referenced document (including any amendments) applies. ISO 1513, Paints and varnishes Examination and preparation of test samples ISO 3696, Water for analytical laboratory use Specification and test methods ISO 15528, Paints, varnishes and raw materials for paints and varni
32、shes Sampling 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 density mass divided by the volume of a portion of a material NOTE It is expressed in grams per cubic centimetre. 4 Principle A pyknometer is filled with the product under test. Th
33、e density is calculated from the mass of the product in the pyknometer and the known volume of the pyknometer. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 2811-1:20
34、11ISO 2811-1:2011(E) 2 ISO 2011 All rights reserved5 Temperature The 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 is essential to standardize one test temperature, and (23,0 0,
35、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.2). The test sample and pyknometer shall be conditioned to the
36、 specified or agreed temperature, and it shall be ensured that the temperature variation does not exceed 0,5 C during testing. 6 Apparatus Ordinary laboratory apparatus and glassware, together with the following. 6.1 Pyknometer 6.1.1 Metal pyknometer, with a volume of either 50 cm3or 100 cm3, a circ
37、ular 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 lid shall be concave (see Figure 1). or 6.1.2 Glass pyknometer, with a volume in the range 10 cm3to 100 cm3(Gay-Lussac type) (s
38、ee Figure 2). 6.2 Analytical balance, accurate to 1 mg. 6.3 Thermometer, accurate to 0,2 C and graduated at intervals of 0,2 C or finer. 6.4 Temperature-controlled chamber, capable of accommodating the balance, pyknometer and test sample and maintaining them at the specified or agreed temperature (s
39、ee Clause 5), or water bath, capable of maintaining the pyknometer and test sample at the specified or agreed temperature. 7 Sampling Take a representative sample of the product under test, as described in ISO 15528. Examine and prepare the sample, as described in ISO 1513. 8 Procedure 8.1 General C
40、arry out a single determination on a fresh test sample. The pyknometer shall be calibrated. An example of a calibration method is given in Annex A. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without lic
41、ense from IHS-,-,-BS EN ISO 2811-1:2011ISO 2811-1:2011(E) ISO 2011 All rights reserved 3Figure 1 Metal pyknometer Figure 2 Gay-Lussac pyknometer 8.2 Determination If working with a temperature-controlled chamber (see 6.4), put the pyknometer (6.1) and the test sample next to the balance (6.2) in the
42、 chamber maintained at the specified or agreed temperature. If working with a water bath (see 6.4) rather than a temperature-controlled chamber, put the pyknometer and the test sample in the water bath, maintained at the specified or agreed temperature. Allow approximately 30 min for temperature equ
43、ilibrium to be reached. Using the thermometer (6.3), measure the temperature, tT, of the test sample. Check throughout the determination that the temperature of the chamber or water bath remains within the specified limits. Weigh the pyknometer and record the mass, m1, to the nearest 10 mg for 50 cm
44、3to 100 cm3pyknometers and to the nearest 1 mg for pyknometers less than 50 cm3in volume. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 2811-1:2011ISO 2811-1:2011(E)
45、4 ISO 2011 All rights reservedFill the pyknometer with the product under test, taking care to avoid the formation of air bubbles. Place the lid or stopper of the pyknometer firmly in position and wipe off any excess liquid from the outside of the pyknometer with an absorbent material wetted with sol
46、vent; wipe carefully with cotton wool. Record the mass of the pyknometer filled with the product under test, m2. NOTE Liquid adhering to the ground-glass surfaces of a glass pyknometer or to the areas of contact between the lid and body of a metal pyknometer causes too high a balance reading. This s
47、ource of error can be minimized by ensuring that the joints are firmly seated and by limiting air bubbles. 9 Calculation Calculate the density, , of the product, in grams per cubic centimetre, at the test temperature, tT, using Equation (1): 21tmmV= (1) where m1is the mass, in grams, of the empty py
48、knometer; m2is the mass, in grams, of the pyknometer filled with the product at the test temperature, tT; Vtis the volume, in cubic centimetres, of the pyknometer at the test temperature, tT, determined in accordance with Annex B. NOTE The result is not corrected for air 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 Equa
