EN IS0 19403-3 EUROPEAN STANDARD NORME EUROPEENNE EUROPAISCHE NORM September 2024 ICS 87.040 Supersedes EN IS0 19403-3:2020 English Version Paints and varnishes - Wettability - Part 3: Determination of the surface tension of liquids using the pendant drop method (IS0 19403-3:2024) Peintures et vernis - Mouillabilite - Partie 3: Beschichtungsstoffe - Benetzbarkeit - Teil 3: Déterminationdelatensiondesurfacedesliquidespar Bestimmung der Oberflachenspannung von la méthode de la goutte pendante (IS0 19403-3:2024) Flissigkeiten mit der Methode des hangenden Tropfens (IS0 19403-3:2024) This European Standard was approved by CEN on 16 August 2024. 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 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 Centrehasthesamestatusastheofficialversions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkiye and United Kingdom. cen EUROPEAN COMMITTEEFOR STANDARDIZATION COMITEEUROPEENDENORMALISATION EUROPAISCHESKOMITEEFURNORMUNG CEN-CENELECManagementCentre:RuedelaScience23,B-1040Brussels 2024CEN Ref. No. EN ISO 19403-3:2024 E All rightsofexploitationinanyformandbyanymeans reserved worldwideforCENnational Members. EN IS0 19403-3:2024 (E) European foreword This document (EN IS0 19403-3:2024) has been prepared by Technical Committee IS0/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of an identical text or by endorsement, at the latest by March 2025, and conflicting national standards shall be withdrawn at the latest by March 2025. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document supersedes EN IS0 19403-3:2020. Any feedback and questions on this document should be directed to the users' national standards body/nationalcommittee.AcompletelistingofthesebodiescanbefoundontheCENwebsite 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, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Tirkiye and the United Kingdom. Endorsement notice The text of IS0 19403-3:2024 has been approved by CEN as ENIS0 19403-3:2024 without any modification. Contents Page Foreword. .iv 1 Scope .1 2 Normative references .1 3 Terms and definitions. .1 4 Principle .1 5 ..2 Apparatus and materials .3 6 Sampling 7 .3 Procedure. 7.1 .3 General 7.1.1 Setting up the drop contour analysis device .3 7.1.2 Test conditions .4 7.2 Determination of the surface tension of the liquid .4 7.2.1 Preparations .4 7.2.2 Procedure. .4 Evaluation .4 9 Precision .5 .5 9.1 General 9.2 Repeatability limit, r .5 9.3 Reproducibility limit, R 10 .5 Test report Annex A (informative) Density of test liquids .6 .7 Annex B (normative) Shape parameter, B, and Worthington number Annex C (informative) Details of an interlaboratory test .8 Bibli