EN ISO 787-22:2017

General methods of test for pigments and extenders - Part 22: Comparison of resistance to bleeding of pigments (ISO 787-22:1980)

Specifies a method for comparing the resistance to bleeding with that of an agreed sample. The method has been established because it is essentially a practical test and as such is probably of greater general value than other methods.

Allgemeine Prüfverfahren für Pigmente und Füllstoffe - Teil 22: Vergleich der Beständigkeit von Pigmenten gegen Ausbluten (ISO 787-22:1980)

Dieser Teil von ISO 787 legt ein allgemeines Prüfverfahren zum Vergleichen der Beständigkeit eines Pigmentes gegen Ausbluten mit der einer vereinbarten Probe.
ANMERKUNG   Wenn dieses allgemeine Verfahren auf ein gegebenes Pigment anwendbar ist, sollte die internationale Norm, die sich mit diesem Pigment befasst, nur einen Querverweis zu diesem Verfahren beinhalten, zusammen mit detaillierten Anmerkungen zu Modifikationen, die in Anbetracht der besonderen Eigenschaften des Pigmentes erforderlich sein könnten. Nur wenn dieses allgemeine Verfahren auf ein bestimmtes Pigment nicht anwendbar sind, sollte ein spezielles Verfahren zum Vergleich der Beständigkeit gegen Ausbluten festgelegt werden.

Méthodes générales d'essai des pigments et matières de charge - Partie 22: Comparaison de la résistance au saignement des pigments (ISO 787-22:1980)

Donne des indications sur les limites de température maximales de court-circuit des câbles électriques de tension assignées de 1kV (Um = 1,3 kV) et 3 kV (Um = 3,6 kV), en ce qui concerne:
- les matériaux d'isolation;
- les matériaux de gainage et de bourrage;
- les matériaux de l'âme et de la gaine métallique et les méthodes de raccordement.
La conception des accessoires et l'influence des conditions d'installation sur les limites de température sont prises en compte.

Splošne metode preskušanja pigmentov in polnil - 22. del: Primerjava odpornosti pigmentov proti bledenju (ISO 787-22:1980)

Ta standard določa metodo za primerjavo odpornosti pigmentov proti bledenju z dogovorjenim vzorcem. Ta metoda je bila določena, ker gre v bistvu za praktični preskus, in ima kot taka verjetno večjo splošno vrednost kot druge metode.

General Information

• Status: Published
• Publication Date: 17-Oct-2017
• Withdrawal Date: 29-Apr-2018
• ICS: 87.060.10 - Pigments and extenders
• Technical Committee: CEN/TC 298 - Pigments and extenders
• Drafting Committee: CEN/TC 298 - Pigments and extenders
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 18-Oct-2017
• Due Date: 02-Apr-2019
• Completion Date: 18-Oct-2017
• Ref Project: SIST EN ISO 787-22:2018 - General methods of test for pigments and extenders - Part 22: Comparison of resistance to bleeding of pigments (ISO 787-22:1980)

Relations

• Refers: EN 632:1995 - Agricultural machinery - Combine harvesters and forage harvesters - Safety
• Effective Date: 28-Jan-2026

Overview - EN ISO 787-22:2017 (ISO 787-22:1980)

EN ISO 787-22:2017 specifies a practical comparative test method to evaluate the resistance to bleeding of pigments used in paints and coatings. The method compares a test pigment against an agreed reference sample by applying pigment dispersions to test panels, overcoating with a white composition, and assessing any discoloration (bleeding) visually or instrumentally. This part of the ISO 787 series is intended as a general, broadly applicable procedure for pigments and extenders.

Key topics and technical requirements

• Purpose: Compare bleeding of a pigment under agreed conditions with a reference (agreed) sample. The standard emphasizes a practical, visual comparison rather than purely solvent-solubility tests.
• Sampling: Representative sampling as per ISO 842.
• Test materials:
  • Metal or equivalent test panels (e.g., bright tinplate or aluminium), typically 150 mm x 100 mm.
  • Agreed medium for pigment dispersion and an agreed white overcoating composition.
  • Optional abrasion using silicon carbide paper grade 600 and black-and-white charts for evaluation.
• Application details:
  • Prepare dispersions of the test pigment and the agreed sample in the same medium.
  • Apply dispersion to two-thirds of panel length to a wet film thickness of 75–120 µm; leave one end uncoated.
  • Apply the white overcoating so panels have areas coated only with overcoat, only with pigment dispersion + overcoat, and over a black-and-white chart.
  • Dry at ambient or subject to agreed stoving conditions.
• Assessment and reporting:
  • Compare in diffuse daylight (or artificial daylight) following ISO 3668; repeat after 24 hours.
  • Results expressed as bleeding less than, equal to, or greater than the agreed sample.
  • Test report must include pigment ID, reference to ISO 787-22, agreed test conditions, daylight type, result, deviations and date.

Practical applications and users

• Who uses this standard:
  • Pigment manufacturers and suppliers (quality control and product comparison)
  • Paint, varnish and coatings formulators (compatibility and formulation stability)
  • Coatings test laboratories and certification bodies
  • R&D teams assessing pigment migration and staining risks
• Typical applications:
  • Routine QC checks to confirm new batches match reference bleeding performance
  • Comparative assessments during pigment selection for sensitive topcoats
  • Supplier-to-customer acceptance tests where an “agreed sample” is used

Related standards

• ISO 787 series - general methods for pigments and extenders (other parts cover colour, density, lightfastness, etc.)
• ISO 842 - Sampling of raw materials for paints and varnishes
• ISO 3668 - Visual comparison of paint colour (used for assessment)

Keywords: EN ISO 787-22:2017, ISO 787-22, resistance to bleeding, pigments, extenders, pigment bleeding test, paint testing, coatings quality control.

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2018
Splošne metode preskušanja pigmentov in polnil - 22. del: Primerjava odpornosti
pigmentov proti bledenju (ISO 787-22:1980)
General methods of test for pigments and extenders - Part 22: Comparison of resistance
to bleeding of pigments (ISO 787-22:1980)
Allgemeine Prüfmethoden für Pigmente und Füllstoffe - Teil 22: Vergleich der
Beständigkeit von Pigmenten gegen Ausbluten (ISO 787-22:1980)
Méthodes générales d'essai des pigments et matières de charge - Partie 22:
Comparaison de la résistance au saignement des pigments (ISO 787-22:1980)
Ta slovenski standard je istoveten z: EN ISO 787-22:2017
ICS:
87.060.10 Pigmenti in polnila Pigments and extenders
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 787-22
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2017
EUROPÄISCHE NORM
ICS 87.060.10
English Version
General methods of test for pigments and extenders - Part
22: Comparison of resistance to bleeding of pigments (ISO
787-22:1980)
Méthodes générales d'essai des pigments et matières Allgemeine Prüfmethoden für Pigmente und Füllstoffe -
de charge - Partie 22: Comparaison de la résistance au Teil 22: Vergleich der Beständigkeit von Pigmenten
saignement des pigments (ISO 787-22:1980) gegen Ausbluten (ISO 787-22:1980)
This European Standard was approved by CEN on 21 September 2017.

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
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 787-22:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 787-22:1980 has been prepared by Technical Committee ISO/TC 256 “Pigments,
dyestuffs and extenders” of the International Organization for Standardization (ISO) and has been taken
over as EN ISO 787-22:2017 by Technical Committee CEN/TC 298 “Pigments and extenders” 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 April 2018, and conflicting national standards shall be
withdrawn at the latest by April 2018.
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.
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,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 787-22:1980 has been approved by CEN as EN ISO 787-22:2017 without any
modification.
International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONWlE~YHAPO~HAR OPi-AHM3ALAMR I-IO CTAHJJAPTkl3ALWlWRGANISATION INTERNATIONALE DE ~ORMALISATION
General methods of test for Pigments and extenders -
Part 22 : Comparison of resistance to bleeding of
Pigments
Mbthodes ghkrales d ’essai des Pigments et matikres de Charge -
Partie 22 : Comparaison de Ia rksistance au saignement des pigmen ts
First edition
- 1980-02-01
Ref. No. ISO 787/22-1980 (EI
UDC 667.622 : 620.1 : 667.613.752
Descriptors : paints, Pigments, tests, stability tests, bleeding.
Price based on 2 pages
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards institutes (ISO member bodies). The werk of developing Interna-
tional 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 member bodies for approval before their acceptance as International Standards by
the ISO Council.
International Standard ISO 787/22 was developed by Technical Committee
ISO/TC 35, Paints and varnishes, and was circulated to the member bodies in
March 1978.
lt has been approved by the member bodies of the following countries :
Australia Ireland Romania
Austria Israel South Africa, Rep. of
Bulgaria Italy Sweden
Kenya Switzerland
Canada
Egypt, Arab Rep. of Korea, Rep. of Turkey
Netherlands United Kingdom
France
Germany, F. R. New Zealand Yugoslavia
India Norway
Iran Poland
No member body expressed disapproval of the document.
0 International Organkation for Standardization, 1980
Printed in Switzerland
ii
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 C
...