1、BRITISH STANDARD BS EN ISO 787-2:1995 Incorporating Amendment No. 1 General methods of test for pigments and extenders Part 2: Determination of matter volatile at 105 degrees C The European Standard EN ISO 787-2:1995 has the status of a British StandardBSENISO787-2:1995 This British Standard, having
2、 been prepared under the directionof the Pigments, Paints and Varnishes Standards Committee, was published underthe authority ofthe BoardofBSI and comes into effect on 30November1982 BSI 03-2000 First published March1974 First revision November1982 The following BSI references relate to the work on
3、this standard: Committee reference PVC/1 Draft for comment 80/50279 DC ISBN 0 580 12936 5 Amendments issued since publication Amd. No. Date of issue Comments 8506 August 1995 Indicated by a sideline in the marginBSENISO787-2:1995 BSI 03-2000 i Contents Page National foreword ii Foreword 2 Text of EN
4、 ISO 787-2 3 Publication referred to Inside back coverBSENISO787-2:1995 ii BSI 03-2000 National foreword The revision of Part B6of BS3483 has been prepared under the direction of the Pigments, Paints and Varnishes Standards Committee. It is identical with ISO787-2 “General methods of test for pigmen
5、ts and extenders Part2:Determination of matter volatile at105 C”, published in1981 by the International Organization for Standardization (ISO). In1994the European Committee for Standardization (CEN) accepted ISO787-2:1981 as European Standard ENISO787-2:1995. As a consequence of implementing the Eur
6、opean Standard this British Standard is renumbered as BSEN787-2 and any reference to BS3483-B6 should be read as a reference to BSENISO 787-2. This Part of BS3483supersedes BS3483-B6:1974which is withdrawn. Terminology and conventions. The text of the International Standard has been approved as suit
7、able for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is especially drawn to the following. The comma has been used as a decimal marker. In British Standards it is current practice to u
8、se a full point on the baseline as the decimal marker. Wherever the words “This part of ISO787” and “International Standard” appear, referring to this standard, they should be read as “This Part of BS3483” and “British Standard” respectively. Additional information. In paragraph2of 5.2 of ISO787-2:1
9、981, it is stated that the whole procedure (clause 5) is to be repeated if the duplicate determinations differ by more than10%. In implementing this standard in the United Kingdom, it is recommended that, if repeat determinations are necessary, wherever possible both the sampling (clause4) and the p
10、rocedure (clause5) should be repeated 1) . A British Standard does not purport 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
11、. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN ISO title 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 amendmen
12、t table on the inside front cover. Cross-reference International Standard Corresponding British Standard ISO 842:1974 BS 4726:1971 Methods for sampling raw materials for paints and varnishes (Technically equivalent) 1) This change has been reported to the ISO in a proposal to amend the text of the I
13、nternationalStandard.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 787-2 March 1995 ICS 87.060.10 Descriptors: Paints, pigments, tests, colour English version General methods of test for pigments and extenders Part2: Determination of matter volatile at 105 degrees C (ISO 787-2:1981) Mthod
14、es gnrales dessai des pigments et matires de charge Partie 2: Dtermination des matires volatiles 105 degrs C (ISO 787-2:1981) Allgemeine Prfverfahren fr Pigmente und Fllstoffe Teil 2: Bestimmung der bei 105 C flchtige Anteile (ISO 787-2:1981) This European Standard was approved by CEN on1994-10-17.
15、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 on a
16、pplication to the Central Secretariat 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 Central Secretariat h
17、as the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Sta
18、ndardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1995 All rights of reproduction and communication in any form and by any means reserved in all countries to CEN and its members Ref. No. EN ISO 787-2:1995 EENISO787-2:1
19、995 BSI 03-2000 2 Foreword This European Standard has been taken over by the Technical Committee CEN/TC298, Pigments and extenders, from the work of ISO/TC35, Paints and varnishes, of the International Organization for Standardization (ISO). This European Standard shall be given the status of a nati
20、onal standard, either by publication of an identical text or by endorsement, at the latest by September1995, and conflicting national standards shall be withdrawn at the latest by September1995. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this Eu
21、ropean Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Contents Page Foreword 2 0 Introduction 3 1 Scope and field of application 3 2 Reference 3 3 Apparatus 3 4
22、Sampling 3 5 Procedure 3 6 Expression of results 3 7 Test report 3ENISO787-2:1995 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 ISO787specifies a general method of test for determining
23、 the percentage by mass of matter volatile at a temperature of105 C in a sample of pigment or extender. This method is applicable to pigments and extenders that are stable at 105 C (but see also the note to5.2). NOTEWhen this general method is applicable to a given pigment or extender, only a cross-
24、reference to it should be included in the International Standard relating to that pigment or extender, with 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
25、should a special method for determination of volatile matter be specified. 2 Reference ISO 842, Raw materials for paints and varnishes Sampling. 3 Apparatus 3.1 Weighing bottle, squat form, wide-mouthed, with ground glass stopper. 3.2 Oven, capable of being maintained at 105 2 C. 3.3 Balance, accura
26、te to1mg or better. 3.4 Desiccator, containing an efficient desiccant. 4 Sampling Take a representative sample of the material to be tested as described in ISO842. 5 Procedure Carry out the determination in duplicate. 5.1 Test portion Heat the weighing bottle (3.1), with the stopper removed, in the
27、oven (3.2) at105 C for2h. Allow to cool in the desiccator (3.4), insert the stopper and weigh to the nearest1mg. Spread101g of the sample in a uniform layer on the bottom of the weighing bottle, insert the stopper and weigh to the nearest1mg. NOTEIt may be necessary to reduce the mass of the test po
28、rtion for pigments and extenders with a high bulk volume. The use of a test portion smaller than that specified should be stated in the test report. 5.2 Determination Heat the weighing bottle and contents, with the stopper removed, in the oven at105 2 C for a minimum of1h. Allow to cool in the desic
29、cator, insert the stopper and weigh to the nearest1mg. Repeat the heating for at least30min, allow to cool in the desiccator, insert the stopper and again weigh to the nearest1mg. Repeat this procedure until two successive weighings differ by no more than5mg. Record the lower mass. 2) If the results
30、 of the two determinations differ by more than10% of the higher value, repeat the whole procedure (clause5). NOTEIf the material under test is unstable at105 C, the test conditions should be agreed between the interested parties and should be stated in the test report. 6 Expression of results Calcul
31、ate the matter volatile at105 C, expressed as a percentage by mass, by the formula where m 0 is the mass, in grams, of the test portion; m 1 is the mass, in grams, of the residue. Calculate the mean of the two determinations, if they do not differ by more than10% of the higher value, and report the
32、result to the nearest0,1%. Report results between0and 0,1% as “less than0,1%”. 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 (ISO787-2); c) the result of the test as
33、indicated in clause6; d) any deviation, by agreement or otherwise, from the procedure specified, particularly another test temperature; e) the date of the test. 2) See the paragraph headed “Additional information” in the national foreword.4 blankBSENISO787-2:1995 BSI 03-2000 Publication referred to
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