Titanium dioxide pigments for paints - Part 1: Specifications and methods of test (ISO 591-1:2000)

This International Standard specifies the requirements and the corresponding methods of test for titanium dioxide pigments for paints.

Titandioxid-Pigmente - Teil 1: Anforderungen und Prüfverfahren (ISO 591-1:2000)

Dieser Teil von ISO 591 legt die Anforderungen und die entsprechenden Prüfverfahren für Titandioxid-Pigmente für Beschichtungsstoffe fest.

Pigments de dioxyde de titane pour peintures - Partie 1: Spécifications et méthodes d'essai (ISO 591-1:2000)

La présente partie de l'ISO 591 spécifie les caractéristiques des pigments de dioxyde de titane pour peintures et les méthodes d'essai correspondantes.

Pigmenti titanovega dioksida za barve - 1. del: Specifikacije in metode preskušanja (ISO 591-1:2000)

General Information

Status
Published
Publication Date
31-Dec-2000
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Jan-2001
Due Date
01-Jan-2001
Completion Date
01-Jan-2001

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SLOVENSKI STANDARD
SIST EN ISO 591-1:2001
01-januar-2001
Pigmenti titanovega dioksida za barve - 1. del: Specifikacije in metode preskušanja
(ISO 591-1:2000)
Titanium dioxide pigments for paints - Part 1: Specifications and methods of test (ISO
591-1:2000)
Titandioxid-Pigmente - Teil 1: Anforderungen und Prüfverfahren (ISO 591-1:2000)
Pigments de dioxyde de titane pour peintures - Partie 1: Spécifications et méthodes
d'essai (ISO 591-1:2000)
Ta slovenski standard je istoveten z: EN ISO 591-1:2000
ICS:
87.060.10 Pigmenti in polnila Pigments and extenders
SIST EN ISO 591-1:2001 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 591-1:2001

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SIST EN ISO 591-1:2001
EUROPEAN STANDARD
EN ISO 591-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2000
ICS 08.006.10; 87.060.10
English version
Titanium dioxide pigments for paints - Part 1: Specifications and
methods of test (ISO 591-1:2000)
Pigments de dioxyde de titane pour peintures - Partie 1: Titandioxid-Pigmente - Teil 1: Anforderungen und
Spécifications et méthodes d'essai (ISO 591-1:2000) Prüfverfahren (ISO 591-1:2000)
This European Standard was approved by CEN on 15 September 2000.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2000 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 591-1:2000 E
worldwide for CEN national Members.

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SIST EN ISO 591-1:2001
Page 2
EN ISO 591-1:2000
CORRECTED  2001-04-11
Foreword
The text of the International Standard ISO 591-1:2000 has been prepared by Technical
Committee ISO/TC 35 "Paints and varnishes" in collaboration with 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 March 2001, and conflicting national
standards shall be withdrawn at the latest by March 2001.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United
Kingdom.
Endorsement notice
The text of the International Standard ISO 591-1:2000 was approved by CEN as a European
Standard without any modification.
NOTE: Normative references to International Standards are listed in annex ZA (normative).

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SIST EN ISO 591-1:2001
Page 3
EN ISO 591-1:2000
Annex ZA (normative)
Normative references to international publications
with their relevant European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions
of any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).
NOTE Where an International Publication has been modified by common modifications,
indicated by (mod.), the relevant EN/HD applies.
Publication Year Title EN Year
ISO 787-2 1981 General methods of test for pigments EN ISO 787-2 1995
and extenders - Part 2: Determination
of matter volatile at 105 degrees C
ISO 787-3 2000 General methods of test for pigments EN ISO 787-3 2000
and extenders - Part 3: Determination
of matter soluble in water - Hot
extraction method
ISO 787-5 1980 General methods of test for pigments EN ISO 787-5 1995
and extenders - Part 5: Determination
of oil absorption value
ISO 787-9 1981 General methods of test for pigments EN ISO 787-9 1995
and extenders - Part 9: Determination
of pH value of aqueous suspension
ISO 787-18 1983 General methods of test for pigments EN ISO 787-18 1995
and extenders - Part 18: Determination
of residue on sieve - Mechanical
flushing procedure
ISO 787-24 1995 General method of tests for pigments EN ISO 787-24 1995
and extenders - Part 24: Determination
of relative tinting strength of coloured
pigments and relative scattering power
of white pigments - Photometric
methods
ISO 1042 1998 Laboratory glassware - One-mark EN ISO 1042 1999
volumetric flasks
ISO 3696 1987 Water for analytical laboratory use - EN ISO 3696 1995
Specification and test methods

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SIST EN ISO 591-1:2001

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SIST EN ISO 591-1:2001
INTERNATIONAL ISO
STANDARD 591-1
First edition
2000-09-15
Titanium dioxide pigments for paints —
Part 1:
Specifications and methods of test
Pigments de dioxyde de titane pour peintures —
Partie 1: Spécifications et méthodes d'essai
Reference number
ISO 591-1:2000(E)
©
ISO 2000

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SIST EN ISO 591-1:2001
ISO 591-1:2000(E)
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ii © ISO 2000 – All rights reserved

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SIST EN ISO 591-1:2001
ISO 591-1:2000(E)
Contents Page
Foreword.iv
1 Scope .1
2 Normative references .1
3 Term and definition .2
4 Classification.2
4.1 Types.2
4.2 Grades.2
5 Required characteristics and associated tolerances .2
5.1 Appearance .2
5.2 Other characteristics.2
6 Sampling.4
7 Determination of titanium dioxide content .4
7.1 General.4
7.2 Method A: Aluminium reduction method .4
7.3 Method B: Chromium(II) chloride reduction method .8
8 Test report .12
© ISO 2000 – All rights reserved iii

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SIST EN ISO 591-1:2001
ISO 591-1:2000(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 591 may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 591-1 was prepared by Technical Committee ISO/TC 35, Paints and varnishes,
Subcommittee SC 2, Pigments and extenders.
This part of ISO 591 cancels and replaces ISO 591:1977, which has been technically revised. In contrast to
ISO 591:1977, which specified the Nakazono reductor method for the determination of the titanium dioxide content
and allowed other methods to be used by agreement between the interested parties, ISO 591-1 contains two
methods (see clause 7).
ISO 591 consists of the following parts, under the general title Titanium dioxide pigments for paints:
� Part 1: Specifications and methods of test
� Part 2: Determination of the content of secondary constituents
iv © ISO 2000 – All rights reserved

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SIST EN ISO 591-1:2001
INTERNATIONAL STANDARD ISO 591-1:2000(E)
Titanium dioxide pigments for paints —
Part 1:
Specifications and methods of test
1 Scope
This part of ISO 591 specifies the requirements and corresponding methods of test for titanium dioxide pigments for
paints.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this part of ISO 591. 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 591 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 385-1:1984, Laboratory glassware — Burettes — Part 1: General requirements.
ISO 648:1977, Laboratory glassware — One-mark pipettes.
ISO 787-1:1982, General methods of test for pigments and extenders — Part 1: Comparison of colour of pigments.
ISO 787-2:1981, General methods of test for pigments and extenders — Part 2: Determination of matter volatile at
105 °C.
ISO 787-3:2000, General methods of test for pigments and extenders — Part 3: Determination of matter soluble in
water — Hot extraction method.
ISO 787-5:1980, General methods of test for pigments and extenders — Part 5: Determination of oil absorption
value.
ISO 787-9:1981, General methods of test for pigments and extenders — Part 9: Determination of pH value of an
aqueous suspension.
ISO 787-14:1973, General methods of test for pigments — Part 14: Determination of resistivity of aqueous extract.
ISO 787-18:1983, General methods of test for pigments and extenders — Part 18: Determination of residue on
sieve — Mechanical flushing procedure.
ISO 787-24:1985, General methods of test for pigments and extenders — Part 24: Determination of relative tinting
strength of coloured pigments and relative scattering power of white pigments — Photometric methods.
ISO 787-25:1993, General methods of test for pigments and extenders — Part 25: Comparison of the colour, in full-
shade systems, of white, black and coloured pigments – Colorimetric method.
© ISO 2000 – All rights reserved 1

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SIST EN ISO 591-1:2001
ISO 591-1:2000(E)
ISO 1042:1998, Laboratory glassware — One-mark volumetric flasks.
ISO 3696:1987, Water for analytical laboratory use — Specification and test methods.
ISO 15528:2000, Paints, varnishes and raw materials for paints and varnishes — Sampling.
3 Term and definition
For the purposes of this part of ISO 591, the following term and definition apply.
3.1
titanium dioxide pigment
pigment consisting essentially of titanium dioxide (TiO ) of the anatase or the rutile crystal structure, as determined
2
by X-ray examination
4 Classification
4.1 Types
This part of ISO 591 covers two types of titanium dioxide pigment, as follows:
Type A: Anatase type
Type R: Rutile type
4.2 Grades
The pigments are further classified into the following grades:
Grade A1

� Type A
Grade A2

Grade R1


Grade R2
Type R


Grade R3

5 Required characteristics and associated tolerances
5.1 Appearance
The material shall be in the form of a soft, dry powder or in such a condition that it may be readily reduced thereto
by crushing under a palette knife, without any grinding action.
5.2 Other characteristics
5.2.1 For titanium dioxide pigments complying with this part of ISO 591, the essential requirements are specified
in Table 1 and the conditional requirements are listed in Table 2. The conditional requirements shall be specified by
agreement between the interested parties.
The requirement for matter volatile at 105 °C after preconditioning in Table 2 shall only apply if this characteristic is
explicitly specified by the interested parties or in a contract.
2 © ISO 2000 – All rights reserved

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SIST EN ISO 591-1:2001
ISO 591-1:2000(E)
5.2.2 The agreed reference pigment referred to in Table 2 shall comply with the requirements of Table 1.
Table 1 — Essential requirements
Requirement depending on type and grade
Characteristic Type A Type R Method of test
A1 A2 R1 R2 R3
Titanium dioxide content
98 92 97 90 80 See clause 7
% (by mass), min.
Matter volatile at 105 °Cat
To be agreed between
point of acceptance
0,5 0,8 0,5 ISO 787-2
the interested parties
% (by mass), max.
Matter soluble in water
a
0,6 0,5 0,6 0,5 0,7 ISO 787-3
% (by mass), max.
Residueonsieve (45 �m)
ISO 787-18 or other
0,1 0,1 0,1 0,1 0,1
agreed method
% (by mass), max.
a
If necessary, a coagulation agent may be used.
Table 2 — Conditional requirements
Requirement depending on type and grade
Characteristic Type A Type R Method of test
A1 A2 R1 R2 R3
ISO 787-1 or
Colour Similar to that of the agreed reference pigment (see 5.2.2)
a
ISO 787-25
Scattering power To be agreed between the interested parties ISO 787-24
Matter volatile at 105 °C after 24 h
preconditioning at (23 � 2) °C and
0,5 0,8 0,5 1,5 2,5 ISO 787-2
(50 � 5) % relative humidity
b
% (by mass), max.
pH of aqueous suspension ISO 787-9
Similar to that of the agreed reference pigment (see 5.2.2)
Oil absorption value ISO 787-5
Similar to that
of the agreed Similar to that of the
Resistivity of aqueous extract — reference — agreed reference ISO 787-14
pigment (see pigment (see 5.2.2)
5.2.2)
a
By agreement only.
b
See 5.2.1.
© ISO 2000 – All rights reserved 3

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SIST EN ISO 591-1:2001
ISO 591-1:2000(E)
6 Sampling
Take a representative sample of the product to be tested, as described in ISO 15528.
7 Determination of titanium dioxide content
7.1 General
For the determination of the titanium dioxide content, two methods (A and B) are provided. In cases of dispute,
either of the methods may be used as the referee method, by agreement between the interested parties.
Method A uses aluminium metal as the reducing agent. It is suitable for individual determinations and for routine
analysis.
Method B uses chromi
...

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