787/18 International Standard (ISO INTERNATIONAL ORGANIZATION FOR STANDARDIZATION+MEXAYHAPOAHAA OPTAHW3ALMA NO CTAHAAPTW3AUWM+ORGANISATION INTERNATIONALE DE NORMALISATION General methods of test for pigments and extenders - Part 18 : Determination of residue on sieve Mechanical flushing procedure Methodes generales d'essai des pigments etmatieres de charge-Partie 18:Determination du refus surtamis -Methode mecanique avec liquided'entrainement Second edition -:1983-02-15 UDC 667.622:620.1: 621.928 Ref.No.ISO787/18-1983 (E) Descriptors : paints, pigments, determination, sieve residues. Price based on 4 pages Foreword ISo (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies).The work of developing International Standards is carried out through IsO technical committees.Everymember body interested in a subject for whicha technical committee has beenauthorized hasthe right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with Iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. International Standard ISO787/18 was developed by Technical Committee ISO/TC 35,Paints and varnishes,and was circulated to the member bodies in November1980. It has been approved by the member bodies of the following countries : Austria Ireland Poland Belgium Israel Portugal Brazil Italy Romania Canada Kenya South Africa, Rep. of China Korea, Dem. P. Rep. of Spain Czechoslovakia Korea, Rep. of Sweden Egypt, Arab Rep. of Mexico Switzerland Germany, F. R. Netherlands United Kingdom Hungary Norway USSR The member body of thefollowing country expressed disapproval of the document on technical grounds : France This International Standard cancels and replaces ISO 787/XVIll-1973, of which it con- stitutes a technical revision. InternationalOrganizationforStandardization,1983 . Printed in Switzerland i The purpose of this International Standard is to establish a series of general test methods for pigments and extenders which are suitable for all or many of the individual pigments and extenders for which specifications might be required. In such cases, a cross-reference to the general method should be included in the International Standard relating to that pigment or extender, with a note of any detailed modifications which might be needed in view of the special properties of the product in question. Technical Committee ISO/TC 35, Paints and varnishes, decided that all the general methods should be published as they become available, as parts of a single Interna- tional Standard, in order to emphasize the relationship of each to the whole series. The Technical Committee also decided that,where two or moreprocedures were widely used for determining the same or a similar characteristic of a pigment or ex- tender, there would be no objection to including more than one of them in the ISo series. In such cases it will, however, be essential to state clearly in a specification which method is to be used and, in the test report, which method has been used. Parts ofthe series alreadypublished are asfollows: Part 1 : Comparison of colour of pigments Part 2 :Determination ofmatter volatile at 105°C Part 3 : Determination of matter soluble in water-Hot extraction method Part 4 : Determination of acidity oralkalinity of the aqueous extract Part 5 : Determination of oil absorption value Part 7 : Determination of residue on sieve -Water method -- Manual procedure Part 8 : Determination of matter soluble in water - Cold extraction method Part 9 : Determination of pHvalue of an aqueous suspension Part 10 : Determination of density - Pyknometer method Part 11 : Determination of tamped volume and apparent density after tamping Part 13 : Determination of water-soluble sulphates, chlorides