(iso 787/22 International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEXAYHAPOAHAR OPrAHM3ALMA IO CTAHAAPTW3AUWM ORGANISATION INTE RNATIONALE DE NORMALISATION ANsi liurliat Doc Sect General methods of test for pigments and extenders : Part 22 : Comparison of resistance to bleeding of pigments Méthodes génerales d'essai des pigments et matieres de charge - Partie 22 : Comparaison de la resistance au saignement des pigments First edition - 1980-02-01 JAN 1 8 1980 ISO 787/22-1980 (E) UDC 667.622 : 620.1 : 667.613.752 Ref. No. 1ISO 787/22-1980 (E) Descriptors : paints, pigments, tests, stability tests, bleeding. Price based on 2 pages ted without license from IHS Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards institutes (ISO member bodies). The work of developing Interna- 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 member bodies for approval before their acceptance as International Standards by the ISo Council. International ISO/Tc 35, Paints and varnishes, and was circuiated to the member bodies in March 1978. Australia Ireland Romania Austria Israel South Africa, Rep. of Bulgaria Italy Sweden Canada Kenya Switzerland Turkey Egypt, Arab Rep. of Korea, Rep. of France Netherlands United Kingdom Germany, F. R. New Zealand Yugoslavia Norway India Iran Poland No member body expressed disapproval of the document. @ International Organization for Standardization, 1980 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 decided that all the general methods should be published as they become available, as parts of a single International 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 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 of the series already published are as follows : Part 1 : Comparison of colour Part 2 Part 3 : Determination of matter soluble in water Hot extraction method Part 4 : Determination of acidity or alkalinity of the aqueous extract Part 5 : Determination of oil absorption value : Determination of residue on sieve -- Oil method Part 6 : Determination of residue on sieve -- Water method Part 7 Part 8 : Determination of matter soluble in water - Cold extraction method Part 9 : Determination of pH value of an aqueous suspension Part 10 : Determination of density --- Pyknometer method Part 11 : Determination of tamped voiume and apparent density after tamping Part 12 : Visual comparison of hue of powdered white pigment (Hollow cone method)1) Part 13 : Determination of water-soluble suiphates, chlorides and nitrates Part 14 : Determination of resistivity of aqueous extract Part 15 : Comparison of resistance of coloured pigments of similar types to light from a specified light source Part 16 : Comparison of relative tinting strength (or equivalent colouring value) and c