BS EN ISO 28199-2-2009 Paints and varnishes - Evaluation of properties of coating systems related to the application process - Colour stability process hiding power re-dissolving om.pdf

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1、BS EN ISO28199-2:2009ICS 87.040NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDPaints and varnishes Evaluation ofproperties of coatingsystems related to theapplication processPart 2: Colour stability, processhiding power, re-dissolving, oversprayabsorption, wett

2、ing, surface textureand mottling (ISO 28199-2:2009)This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2009. BSI 2009ISBN 978 0 580 59285 0Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 28199-2:2009National forew

3、ordThis British Standard is the UK implementation of EN ISO28199-2:2009. 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 be obtained onrequest to its secretary.This publication does

4、not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunityfrom legal obligations.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 28199-2 September 2009 ICS 87.040 English Vers

5、ion Paints and varnishes - Evaluation of properties of coating systems related to the application process - Part 2: Colour stability, process hiding power, re-dissolving, overspray absorption, wetting, surface texture and mottling (ISO 28199-2:2009) Peintures et vernis - valuation des proprits des s

6、ystmes de revtement lies au mode dapplication - Partie 2: Stabilit des couleurs, pouvoir masquant du procd, dtrempe, absorption des pertes de peinture la pulvrisation, mouillage, texture superficielle et marbrures (ISO 28199-2:2009) Beschichtungsstoffe - Beurteilung applikationsbedingter Eigenschaft

7、en von Beschichtungssystemen - Teil 2: Farbstabilitt, Prozessdeckvermgen, Anlsen, Spritznebelaufnahme, Benetzung, Oberflchenstruktur, Wolkigkeit (ISO 28199-2:2009) This European Standard was approved by CEN on 21 May 2009. CEN members are bound to comply with the CEN/CENELEC Internal Regulations whi

8、ch 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 application to the CEN Management Centre or to any CEN member. This European S

9、tandard 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 Management Centre has the same status as the official versions. CEN members are the national

10、 standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and Unit

11、ed Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 28199-2:

12、2009: EBS EN ISO 28199-2:2009EN ISO 28199-2:2009 (E) 3 Foreword This document (EN ISO 28199-2:2009) has been 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 Euro

13、pean Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2010, and conflicting national standards shall be withdrawn at the latest by March 2010. Attention is drawn to the possibility that some of the element

14、s 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. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Europ

15、ean Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United

16、Kingdom. Endorsement notice The text of ISO 28199-2:2009 has been approved by CEN as a EN ISO 28199-2:2009 without any modification. BS EN ISO 28199-2:2009ISO 28199-2:2009(E) ISO 2009 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definit

17、ions .1 4 Colour stability 1 4.1 General .1 4.2 Evaluation.1 5 Process hiding power .3 5.1 General .3 5.2 Evaluation.3 6 Re-dissolving .3 6.1 General .3 6.2 Evaluation.4 7 Overspray absorption .4 7.1 General .4 7.2 Evaluation.4 8 Wetting5 8.1 General .5 8.2 Evaluation.5 9 Surface texture 6 9.1 Gener

18、al .6 9.2 Evaluation.6 9.2.1 General evaluation 6 9.2.2 Evaluation of base coats 6 9.2.3 Evaluation of clear coats 7 10 Mottling.8 10.1 General .8 10.2 Evaluation.8 11 Test report8 Bibliography9 BS EN ISO 28199-2:2009ISO 28199-2:2009(E) iv ISO 2009 All rights reservedForeword ISO (the International

19、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 interested in a subject for which a technical committee has been esta

20、blished 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 standardiza

21、tion. International Standards are 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 votin

22、g. Publication as an International 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

23、patent rights. ISO 28199-2 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for paints and varnishes. ISO 28199 consists of the following parts, under the general title Paints and varnishes Evaluation of properties of coating systems relate

24、d to the application process: Part 1: Relevant vocabulary and preparation of test panels Part 2: Colour stability, process hiding power, re-dissolving, overspray absorption, wetting, surface texture and mottling Part 3: Visual assessment of sagging, formation of bubbles, pinholing and hiding power B

25、S EN ISO 28199-2:2009ISO 28199-2:2009(E) ISO 2009 All rights reserved vIntroduction In many areas (e.g. car manufacture, industrial coatings, coatings for plastics) the coating materials used are adapted to the specific application equipment and technologies of the particular user. A coating materia

26、l is, therefore, understood to be a semi-manufactured product that only receives its final form in combination with the specific application conditions. The adaptation to the application conditions is therefore decisive for the quality of the coated product. The test methods specified in ISO 28199 a

27、re based on studies by a Working Group of the European Council for Automotive R surface texture; colour in accordance with ISO 7724 (all parts). In combination with visual assessment, the following properties are determined: colour stability, process hiding power, re-dissolving, overspray absorption

28、, wetting, surface texture and mottling (this part of ISO 28199); tendency to sagging, formation of bubbles, pinholing and hiding power (ISO 28199-3). BS EN ISO 28199-2:2009BS EN ISO 28199-2:2009INTERNATIONAL STANDARD ISO 28199-2:2009(E) ISO 2009 All rights reserved 1Paints and varnishes Evaluation

29、of properties of coating systems related to the application process Part 2: Colour stability, process hiding power, re-dissolving, overspray absorption, wetting, surface texture and mottling 1 Scope This part of ISO 28199 specifies methods for the determination of colour stability, process hiding po

30、wer, re-dissolving, overspray absorption, wetting, surface texture and mottling of coating materials applied to a test panel under defined conditions. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edit

31、ion cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 28199-1:2009, Paints and varnishes Evaluation of properties of coatings related to the application process Part 1: Relevant vocabulary and preparation of test panels 3 Ter

32、ms and definitions For the purposes of this document, the terms and definitions given in ISO 28199-1 apply. 4 Colour stability 4.1 General Colour stability is determined by evaluation of the values measured for a wedge-shaped base coat and constant-thickness clear coat, obtained in accordance with 9

33、.4 of ISO 28199-1: 2009. 4.2 Evaluation Plot the colour space values determined for the wedge-shaped base coat and constant-thickness clear coat in accordance with ISO 28199-1:2009, 9.4, against the film thickness of the base coat, and evaluate the development of the curve visually. Determine the lo

34、west (tmin) and the highest (tmax) film thicknesses at which the curve is approximately parallel to the X-axis. With regard to parallelism, a tolerance range or a minimum gradient shall be agreed. Figures 1 and 2 showing examples of film thickness plotted against lightness (L*). The Y-axis can also

35、show the colour values a*, b*, C* and h. The range of colour stability ends at that film thickness at which the curve is no longer parallel to the X-axis. BS EN ISO 28199-2:2009ISO 28199-2:2009(E) 2 ISO 2009 All rights reservedKey X film thickness (m) Y lightness tminstart of colour stability tmaxen

36、d of colour stability Figure 1 Graph showing colour stability (idealized) Key X film thickness (m) Y lightness aEvidence of drift in the colour values of the base coat, i.e. lack of colour stability. Figure 2 Graph showing lack of colour stability BS EN ISO 28199-2:2009ISO 28199-2:2009(E) ISO 2009 A

37、ll rights reserved 35 Process hiding power 5.1 General The process hiding power is determined by evaluation of the values measured for the process substrate, wedge-shaped base coat and constant-thickness clear coat, obtained in accordance with 9.4 of ISO 28199-1:2009. The lowest film thickness exhib

38、iting colour stability (tmin) (see 4.2) is determined. 5.2 Evaluation Using the same method for evaluating the colour stability as specified in 4.2, evaluate the values measured for the process substrate, wedge-shaped base coat and constant-thickness clear coat, obtained in accordance with ISO 28199

39、-1. Figure 3 shows an example of film thickness plotted against lightness (L*). NOTE Often the development of the curves resembles those for colour stability evaluation, but shifted into other film thickness ranges. Key X film thickness (m) Y lightness aPoint at which a constant colour value is achi

40、eved, i.e. the base coat covers the substrate used. Figure 3 Process hiding power 6 Re-dissolving 6.1 General Re-dissolving is determined by evaluation of the values measured for the constant-thickness base coat and wedge-shaped clear coat, obtained in accordance with 9.4 of ISO 28199-1:2009. For a

41、given drying/application process it is possible that, above a certain film thickness, insufficient solvent escapes. The top layer of the base coat will interact with the solvents of the clear coat, which is applied later. This could lead to another arrangement of, for example, effect pigments, which

42、 could result in greater local differences of the colour space values at the same film thickness. BS EN ISO 28199-2:2009ISO 28199-2:2009(E) 4 ISO 2009 All rights reserved6.2 Evaluation Plot the colour space values determined for the constant-thickness base coat and wedge-shaped clear coat, obtained

43、in accordance with ISO 28199-1:2009, 9.4, against the film thickness of the clear coat. Evaluate visually the development of the curves obtained, preferably including L*25 and b*25, since the effect is best visible at 25. Figure 4 shows an example of film thickness plotted against lightness (L*). Re

44、-dissolving will be evidenced on the curve because, as film thickness increases, the curve will begin to drift out of the range defined for colour stability (end of the plateau for colour stability). This might be due to self-colouration or yellowing of the clear coat. Key X film thickness (m) Y lig

45、htness aDrift in colour values indicates re-dissolving. Figure 4 Re-dissolving 7 Overspray absorption 7.1 General Overspray absorption is determined by evaluation of the values measured for the wedge-shaped base coat and constant-thickness clear coat, obtained in accordance with 9.4 of ISO 28199-1:2

46、009. 7.2 Evaluation Using the values measured for the wedge-shaped base coat and constant-thickness clear coat, obtained in accordance with ISO 28199-1:2009, 9.4, plot the lightness value L*25 (see ISO 77243, 4, 5) against the film thickness of the base coat. Figure 5 shows an example of film thickn

47、ess plotted against lightness (L*). Overspray absorption occurs when the first and second spraying stages merge with each other. This results in a steady transition from the plateau of the colour stability to the re-dissolving range (see Figure 5). BS EN ISO 28199-2:2009ISO 28199-2:2009(E) ISO 2009

48、All rights reserved 5Insufficient overspray absorption is characterized by a large number of measured points occurring in at least two areas. Key X film thickness (m) Y lightness aLarge number of measured points from first spraying stage. bLarge number of measured points from second spraying stage.

49、Figure 5 Insufficient overspray absorption 8 Wetting 8.1 General Wetting is determined by evaluation of the values measured for the constant-thickness base coat and wedge-shaped clear coat, obtained in accordance with 9.4 of ISO 28199-1:2009. 8.2 Evaluation Using the values measured for the constant-thickness base coat and wedge-shaped clear coat, obtained in accordance with ISO 28199-1:2009, 9.4, plot the values for the long-wavelength range against the film thickness, and determine t