EN ISO 787-17:2017
(Main)General methods of test for pigments and extenders - Part 17: Comparison of lightening power of white pigments (ISO 787-17:2002)
General methods of test for pigments and extenders - Part 17: Comparison of lightening power of white pigments (ISO 787-17:2002)
This part of ISO 787 specifies a general method of test for comparing the lightening (reducing) power of a white pigment with the lightening power of an agreed sample of the same type.
Two procedures (A and B) are described. Procedure A is quicker than procedure B and is suitable for testing one sample of pigment; procedure B is better for testing several samples, and especially if a pigment of unknown lightening power is being tested.
Allgemeine Prüfverfahren für Pigmente und Füllstoffe - Teil 17: Vergleich des Aufhellvermögens von Weißpigmenten (ISO 787-17:2002)
Méthodes générales d'essai des pigments et matières de charge - Partie 17: Comparaison du pouvoir éclaircissant des pigments blancs (ISO 787-17:2002)
La présente partie de l'ISO 787 spécifie une méthode générale d'essai pour comparer le pouvoir éclaircissant des pigments blancs au pouvoir éclaircissant d'un échantillon agréé de même type.
Deux modes opératoires (A et B) sont décrits. Le mode opératoire A est plus rapide que le mode opératoire B et convient pour essayer un échantillon de pigment. Le mode opératoire B est préférable pour essayer plusieurs échantillons et particulièrement si un pigment de pouvoir éclaircissant inconnu doit être essayé.
Splošne metode preskušanja pigmentov in polnil - 17. del: Primerjava moči posvetlitve belih pigmentov (ISO 787-17:2002)
Ta del standarda ISO 787 določa splošno metodo preskušanja za primerjavo moči posvetlitve (reduciranja) belega pigmenta s primerjavo moči posvetlitve dogovorjenega vzorca iste vrste.
Opisana sta dva postopka (A in B). Postopek A je hitrejši od postopka B in je primeren za preskušanje enega vzorca pigmenta. Postopek B je boljši za preskušanje več vzorcev, še zlasti za preskušanje pigmenta z neznano močjo posvetlitve.
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2018
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SRVYHWOLWYHEHOLKSLJPHQWRY ,62
General methods of test for pigments and extenders - Part 17: Comparison of lightening
power of white pigments (ISO 787-17:2002)
Allgemeine Prüfverfahren für Pigmente und Füllstoffe - Teil 17: Vergleich des
Aufhellvermögens von Weißpigmenten (ISO 787-17:2002)
Méthodes générales d'essai des pigments et matières de charge - Partie 17:
Comparaison du pouvoir éclaircissant des pigments blancs (ISO 787-17:2002)
Ta slovenski standard je istoveten z: EN ISO 787-17:2017
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 787-17
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2017
EUROPÄISCHE NORM
ICS 87.060.10
English Version
General methods of test for pigments and extenders - Part
17: Comparison of lightening power of white pigments
(ISO 787-17:2002)
Méthodes générales d'essai des pigments et matières Allgemeine Prüfverfahren für Pigmente und Füllstoffe -
de charge - Partie 17: Comparaison du pouvoir Teil 17: Vergleich des Aufhellvermögens von
éclaircissant des pigments blancs (ISO 787-17:2002) Weißpigmenten (ISO 787-17:2002)
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 787-17:2017 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
The text of ISO 787-17:2002 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 787-17:2017 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 787-17:2002 has been approved by CEN as EN ISO 787-17:2017 without any
modification.
INTERNATIONAL ISO
STANDARD 787-17
Second edition
2002-08-01
General methods of test for pigments and
extenders —
Part 17:
Comparison of lightening power of white
pigments
Méthodes générales d'essai des pigments et matières de charge —
Partie 17: Comparaison du pouvoir éclaircissant des pigments blancs
Reference number
ISO 787-17:2002(E)
©
ISO 2002
ISO 787-17:2002(E)
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ISO 787-17:2002(E)
Contents Page
1 Scope . 1
2 Normative references . 1
3 Reagent . 1
4 Apparatus . 2
5 Sampling . 2
6 Procedure . 2
7 Expression of results . 4
8 Test report . 5
©
ISO 2002 – All rights reserved iii
ISO 787-17:2002(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO
member bodies). The work of preparing International Standards is normally carried out through ISO technical
committees. Each member body interested in a subject for which a technical committee has been established 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. ISO collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this part of ISO 787 may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO787-17 was prepared by Technical Committee ISO/TC35, Paints and varnishes,
Subcommittee SC 2, Pigments and extenders.
This second edition cancels and replaces the first edition (ISO 787-17:1973), of which it constitutes a minor
(editorial) revision.
ISO 787 consists of the following parts, under the general title General methods of test for pigments and extenders:
— Part 1: Comparison of colour of pigments
— Part 2: Determination of matter volatile at 105 °C
— 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
— 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 pH value 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 and nitrates
— Part 14: Determination of resistivity of aqueous extract
— Part 15: Comparison of resistance to light of coloured pigments of similar types
— Part 16: Determination of relative tinting strength (or equivalent colouring value) and colour on reduction of
coloured pigments — Visual comparison method
— Part 17: Comparison of lightening power of white pigments
— Part 18: Determination of residue on sieve — Mechanical flushing procedure
— Part 19: Determination of water-soluble nitrates (Salicylic acid method)
— Part 21: Comparison of heat stability of pigments using a stoving medium
— Part 22: Comparison of resistance to bleeding of pigments
©
iv ISO 2002 – All rights reserved
ISO 787-17:2002(E)
— Part 23: Determination of density (using a centrifuge to remove entrained air)
— Part 24: Determination of relative tinting strength of coloured pigments and relative scattering power of white
pigments — Photometric methods
— Part 25: Comparison of the colour, in full-shade systems, of white, black and coloured pigments — Colorimetric
method
©
ISO 2002 – All rights reserved v
INTERNATIONAL STANDARD ISO 787-17:2002(E)
General methods of test for pigments and extenders —
Part 17:
Comparison of lightening power of white pigments
1 Scope
This part of ISO 787 specifies a general method of test for comparing the lightening (reducing) power of a white
pigment with the lightening power of an agreed sample of the same type.
Two procedures (A and B) are described. Procedure A is quicker than procedure B and is suitable for testing one
sample of pigment; procedure B is better for testing several samples, and especially if a pigment of unknown
lightening power is being tested.
NOTE When this general method is applicable to a given pigment, a cross-reference to it will simply be included in the
International Standard relating to that pigment, with a note of any detailed modification which may be needed in view of the special
properties of the pigment in question. Only when this general method is not applicable to a particular pigment will a special
method for comparison of lightening power of white pigments be specified.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this part of ISO 787. For dated references, subsequent amendments to, or revisions of, any of these publications do
not apply. However, parties to agreements based on this part of ISO 787 are encouraged to investigate the possibility
of applying the most recent editions of the normative documents indicated below. For undated references, the latest
edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid
International Standards.
ISO 788, Ultramarine pigments for paints
ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling
3Reagent
3.1 Blue paste, with the following composition:
— castor oil, medicinal quality: 500 g
— precipitated calcium sulfate, CaSO ·2H O: 475 g
4 2
— ultramarine blue complying with ISO 788: 5g
1)
— treated natural earth : 20 g
The paste shall be prepared as follows:
Mix the treated natural earth in a beaker with sufficient of the castor oil to give a uniform paste and then gradually stir
◦
in the remaining castor oil. Heat the mixture so obtained to a temperature of 50 C and, after maintaining this
temperature for about 15 min, stir in the ultramarine blue and calcium sulfate, adding them in small amounts.
1) A prepared bentonite is a suitable material.
©
ISO 2002 – All rights reserved 1
ISO 787-17:2002(E)
Disperse thoroughly the paste obtained, by passing through a roller mill or other suitable machine, and stir to
homogenize the paste thoroughly, heating it if necessary.
Store the paste in
...
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