787 / 1 (ISo International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION+MEXAYHAPOAHAR OPFAHM3AUMA NO CTAHAAPTM3AUWWORGANISATION INTE RNATIONALE DE NORMALISATION General methods of test for pigments and extenders Part 1: Comparison of colour of pigments Methodes generales d'essai des pigments et matieres de charge--Partie 1:Comparaison de la couleur des pigments First edition 1982-11-15 UDC667.622:620.1:535.65 Ref.No. ISO787/1-1982 (E) Descriptors : paints, pigments, tests, colour, comparativetests. Price based on 2 pages Foreword ISo (the international Organization for Standardization) is a worldwide federation of national standards institutes (so member bodies). The work of developing Inter- national Standards is carried out through ISo technical committees. Every member body interested in a subject for which a technical committee has been set up 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. Draft International Standards adopted by the technical committees are circulated to the memberbodies forapproval before their acceptanceas International Standards by the ISo Council. International Standard ISo787/1wasdevelopedbyTechnicalCommitteeISo/TC35, Paints and varnishes, and was circulated to the member bodies in June 1980. It has been approved by the member bodies of the following countries: Australia Ireland Poland Austria Israel Romania Italy South Africa, Rep. of Kenya Canada Sweden China Korea, Rep. of Switzerland Egypt, Arab Rep. of Netherlands United Kingdom Norway India USSR The member bodies of the following countries expressed disapproval of the document on technical grounds: France Germany, F.R. This International Standard cancels and replaces ISo Recommendation R787/1-1968, of which it constitutes a technical revision. International Organization for Standardization,1982 Printed in Switzerland i The purpose of this International Standard is to establish a series of general test methods forpigmentsand extenders whicharesuitablefor all or manyofthe 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 more procedures were wide ly used for determining the same or a similar characteristic of a pigment or extender, 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 of the series already published are as follows : Part 1 : Comparison of colour of pigments Part 2 : Determination of matter volatile at 105°C Part 3 :Determinationofmattersolubleinwater Hotextractionmethod Part4 : Determination of acidity or alkalinity of the aqueous extract Part 5 : Determination of oil absorption value Fart 7 : Determination of residue on sieve-Water method -Manual procedure Part 8 :Determination of matter soluble inwater-( Cold extractionmethod Part 9 9: Determination of pH value of an aqueous suspension Part 10 : Determination of density - Pyknometer method Part 13 : Determination of water-soluble sulphates, chlorides and nitrates Part 14 : Determination of resistivity of aqueous extract Part 15 : Comparison of resistance to light of coloured pigments of similar types Part16:Comparisonofrelativetintingstrength(orequivalentcolouringvalue)