1、BRITISH STANDARD BS EN ISO 787-11:1995 Incorporating Amendment No. 1 General methods of test for pigments and extenders Part 11: Determination of tamped volume and apparent density after tamping The European Standard EN ISO 787-11:1995 has the status of a British Standard BSENISO787-11:1995 This Bri
2、tish Standard, having been prepared under the directionof the Pigments, Paintsand Varnishes Standards Committee, was published underthe authority of the BoardofBSI and comes into effect on 30November1982 BSI 03-2000 First published March 1974 First revision November 1982 The following BSI references
3、 relate to the work on this standard: Committee reference PVC/1 Draft for comment 80/50595 DC ISBN 0 580 12939 X Amendments issued since publication Amd. No. Date of issue Comments 8685 December 1995 Indicated by a sideline in the marginBSENISO787-11:1995 BSI 03-2000 i Contents Page National forewor
4、d ii Foreword 2 0 Introduction 3 1 Scope and field of application 3 2 References 3 3 Apparatus 3 4 Sampling 3 5 Procedure 3 6 Expression of results 4 7 Test report 4 Figure Tamping volumeter 4 Publications referred to Inside back coverBSENISO787-11:1995 ii BSI 03-2000 National foreword This revision
5、 of Part B10 of BS3483 has been prepared under the direction of the Pigments, Paints and Varnishes Standards Committee. It is identical with ISO787-11 “General methods of test for pigments and extenders Part11:Determination of tamped volume and apparent density after tamping” published in1981 by the
6、 International Organization for Standardization (ISO). In 1995 the European Committee for Standardization (CEN) accepted ISO787-11:1981 as European Standard EN ISO787-11:1995. As a consequence of implementing the European Standard this British Standard is renumbered as BS EN ISO787-11 and any refere
7、nce to BS3483-B10 should be read as a reference to BS EN ISO787-11. This Part of BS 3483 supersedes BS3483-B10:1974 which is withdrawn. Terminology and conventions. The text of the International Standard has been approved as suitable for publication as a British Standard without deviation. Some term
8、inology and certain conventions are not identical with those used in British Standards; attention is especially drawn to the following. The comma has been used throughout as a decimal marker. In British Standards it is current practice to use a full point on the baseline as the decimal marker. Where
9、ver the words “This part of ISO 787” and “International Standard” appear, referring to this standard, they should be read as “This Part of BS3483” and “British Standard” respectively. The Technical Committee has reviewed the provisions of ISO565, to which reference is made in the text and has decide
10、d that they are acceptable for use in conjunction with this standard. A related British Standard for ISO565:1972 is BS410:1976 “Specification for test sieves”. Additional information. In the last paragraph of 5.2 of ISO787-11:1981, it is stated that the whole procedure (clause5) is to be repeated if
11、 the duplicate determinations differ by more than10ml. In implementing this standard in the UnitedKingdom, it is recommended that, if repeat determinations are necessary, wherever possible both the sampling (clause4) and the procedure (clause5) should be repeated. 1) A British Standard does not purp
12、ort to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front c
13、over, pagesi andii, theENISOtitle page, pages2 to4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Cross-references International Standard Co
14、rresponding British Standard ISO 842:1974 BS 4726:1971 Methods for sampling raw materials for paints and varnishes (Technically equivalent) ISO 4788:1980 BS 604:1982 Specification for graduated glass measuring cylinders (Identical) 1) This change has been reported to the ISO in a proposal to amend t
15、he text of the International Standard.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM ENISO 787-11 August1995 ICS87.060.10; 87.060.30 Descriptors: Paints, pigments, tests, chemical analysis, determination, density measurement, volume, volumeters English version General methods of test for pigments
16、 and extenders Part11: Determination of tamped volume and apparent density after tamping (ISO 787-11:1981) Mthodes gnrales dessai des pigments et matires de charge Partie 11: Dtermination du masse volumique apparent et de la masse apparente aprs tassement (ISO 787-11:1981) Allgemeine Prfverfahren fr
17、 Pigmente und Fllstoffe Teil 11: Bestimmung des Stampfvolumens und der Stampfdichte (ISO787-11:1981) This European Standard was approved by CEN on 1995-03-23. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard th
18、e status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German
19、). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Ger
20、many, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1995 All r
21、ights of reproduction and communication in any form and by any means reserved in all countries to CEN and its members Ref. No. EN ISO787-11:1995 EENISO787-11:1995 BSI 03-2000 2 Foreword The text of the International Standard from ISO/TC35, Paints and varnishes, of the International Organization for
22、Standardization (ISO) has been taken over as a European Standard by the Technical Committee CEN/TC298, Pigments and extenders. 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 February1996, and con
23、flicting national standards shall be withdrawn at the latest by February1996. According to CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Nether
24、lands, Norway, Portugal, Spain, Sweden, Switzerland and the UnitedKingdom.ENISO787-11:1995 BSI 03-2000 3 0 Introduction This document is a part of ISO787, General methods of test for pigments and extenders. 1 Scope and field of application This part of ISO 787 specifies a general method of test for
25、determining the tamped volume and the apparent density after tamping of a sample of pigment or extender. NOTEWhen this general method is applicable to a given pigment or extender, only a cross-reference to it should be included in the International Standard relating to that pigment or extender, with
26、 a note of any detailed modification which may be needed in view of the special properties of the material in question. Only when this general method is not applicable to a particular material should a special method for determination of tamped volume and apparent density after tamping be specified.
27、 2 References ISO 565, Test sieves Woven metal wire cloth and perforated plate Nominal sizes of apertures. ISO 842, Raw materials for paints and varnishes Sampling. ISO 4788, Laboratory glassware Graduated measuring cylinders. 3 Apparatus Ordinary laboratory apparatus and 3.1 Sieve, of diameter 100
28、or 200mm, with a nominal mesh aperture of5004m, complying with the requirements of ISO565. NOTEIf necessary or specified, it is permissible to use sieves with other nominal mesh apertures or diameters. It is, however, recommended that the nominal mesh aperture chosen should correspond to one of the
29、principal sizes given in ISO565. 3.2 Tamping volumeter (see the Figure), composed of the following items. 3.2.1 Measuring cylinder of capacity250ml, complying with the requirements of ISO4788, fitted with a suitable stopper, and with graduation marks at2ml intervals. 3.2.2 Holder for the measuring c
30、ylinder (3.2.1), with shaft. The total mass of the cylinder, stopper and shaft shall be670 45g. 3.2.3 Cam, which lifts the shaft with the measuring cylinder once per revolution and which has a rotational frequency of250 15r/min. 3.2.4 Anvil, so placed that the raised shaft falls from a height of3 0,
31、1mm over the anvil. 3.2.5 Revolution counter, to count the number of revolutions of the cam. 3.2.6 Sleeve, to guide the shaft, constructed of a suitable material to give minimum friction. NOTEThe apparatus should be so constructed that, without undue free play, the friction between the shaft and the
32、 sleeve is as low as possible without the use of a lubricant. 3.3 Oven, capable of being maintained at105 2 C. 3.4 Balance, accurate to0,5g or better. 3.5 Desiccator, containing an efficient desiccant. 4 Sampling Take a representative sample of the material to be tested as described in ISO842. 5 Pro
33、cedure Carry out the procedure in duplicate. 5.1 Test portion Take sufficient of the sample to carry out two determinations (about500ml), dry it in the oven(3.3) at105 2 C for2h and allow it to cool in the desiccator (3.5). NOTEIt may be convenient to take a pre-determined mass of material such that
34、 it occupies the specified volume, and add this to the tared cylinder. Pass the dried material through the sieve (3.1) to disperse any agglomerates and add it to the graduated measuring cylinder (3.2.1) (previously weighed to the nearest0,5g) so that no air pockets are formed. This may be achieved b
35、y tilting and turning the cylinder about its long axis whilst adding the material. When 200 10ml of the material have been added, weigh the cylinder and the sample to the nearest0,5g (see the note). Tap the cylinder gently until the surface of the material is approximately horizontal. Replace the st
36、opper. NOTEIt may be convenient to take a pre-determined mass of material such that it occupies the specified volume, and add this to the tared cylinder. 5.2 Determination Place the cylinder in the holder (3.2.2) of the tamping volumeter (3.2) and tamp it for approximately1250 revolutions of the cam
37、 (3.2.3). Read off the volume of the material to the nearest1ml. NOTEIf the surface of the material is no longer horizontal after tamping, it should nevertheless be possible to estimate the volume to the nearest1ml. Continue tamping in steps of approximately1250 revolutions, reading off the volume o
38、f the material after each step, until the difference between the volume at the end of two successive steps of1250 tampings is less than2ml. Record the final value as the volume of the material after tamping.ENISO787-11:1995 4 BSI 03-2000 2) If the two determinations differ by more than10ml, repeat t
39、he whole procedure (clause5). 6 Expression of results 6.1 Calculation Calculate the tamped volume by the equation Calculate the apparent density after tamping by the equation where m 0 is the mass, in grams, of the empty cylinder; m 1 is the mass, in grams, of the cylinder and material; V is the vol
40、ume, in millilitres, of the material after tamping; v t is the tamped volume, in millilitres per100g, of the material; t is the apparent density, in grams per millilitre, of the material after tamping. Take the mean of two determinations and report the result to the nearest1ml/100g or0,01g/ml respec
41、tively. 6.2 Precision No precision data are currently available. 7 Test report The test report shall contain at least the following information: a) the type and identification of the product tested; b) a reference to this International Standard (ISO787-11); c) the result of the test as indicated in
42、clause6; d) any deviation, by agreement or otherwise, from the procedure specified; e) the date of the test. 2) See the paragraph headed “Additional information” in the national foreword. v t 100 V m 1 m 0 - = t 100 v t - m 1 m 0 V - = = Figure Tamping volumeterBSENISO787-11:1995 BSI 03-2000 Publica
43、tions referred to See the national foreword.BS EN ISO 787-11:1995 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. It
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