EN ISO 3262-8:2023

Extenders - Specifications and methods of test - Part 8: Natural clay (ISO 3262-8:2023, Corrected version 2023-11)

This document specifies requirements and corresponding methods of test for natural clay.

Füllstoffe - Anforderungen und Prüfverfahren - Teil 8: Natürlicher Kaolin (ISO 3262-8:2023, korrigierte Fassung 2023-11)

Dieses Dokument legt Anforderungen und die entsprechenden Prüfverfahren für natürlichen Kaolin fest.

Matières de charge - Spécifications et méthodes d'essai - Partie 8: Argile naturelle (ISO 3262-8:2023, Version corrigée 2023-11)

Le présent document spécifie les exigences relatives à l’argile naturelle ainsi que les méthodes d’essai correspondantes.

Polnila - Specifikacije in preskusne metode - 8. del: Naravni kaolin (ISO 3262-8:2023)

Ta dokument določa zahteve in ustrezne preskusne metode za naravni kaolin.

General Information

• Status: Published
• Publication Date: 06-Jun-2023
• 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: 07-Jun-2023
• Completion Date: 07-Jun-2023
• Ref Project: SIST EN ISO 3262-8:2023 - Extenders - Specifications and methods of test - Part 8: Natural clay (ISO 3262-8:2023)

Relations

• Replaces: EN ISO 3262-8:1999 - Extenders for paints - Specifications and methods of test - Part 8: Natural clay (ISO 3262-8:1999)
• Effective Date: 19-Jan-2023
• Refers: ISO 787-2:2021 - General methods of test for pigments and extenders — Part 2: Determination of matter volatile at 105 °C
• Effective Date: 09-Feb-2026
• Refers: ISO 8130-13:2019 - Coating powders — Part 13: Particle size analysis by laser diffraction
• Effective Date: 09-Feb-2026
• Refers: ISO 3696:1987 - Water for analytical laboratory use — Specification and test methods
• Effective Date: 09-Feb-2026
• Refers: EN 1177:2018+AC:2019/FprA1 - Impact attenuating playground surfacing - Methods of test for determination of impact attenuation
• Effective Date: 28-Jan-2026
• Refers: EN ISO 17201-6:2022 - Acoustics - Noise from shooting ranges - Part 6: Sound pressure measurements close to the source for determining exposure to sound (ISO 17201-6:2021)
• Effective Date: 28-Jan-2026
• Refers: EN 13001-3-5:2025 - Cranes - General design - Part 3-5: Limit states and proof of competence of forged and cast hooks
• Effective Date: 28-Jan-2026
• Refers: CEN/TS 15867:2009 - Advanced technical ceramics - Ceramic composites - Guide to the determination of the degree of misalignment in uniaxial mechanical tests
• Effective Date: 28-Jan-2026
• Refers: EN 14420-7:2022/AC:2023 - Hose fittings with clamp units - Part 7: Cam locking couplings
• Effective Date: 28-Jan-2026
• Refers: EN ISO 22718:2015/A1:2022 - Cosmetics - Microbiology - Detection of Staphylococcus aureus - Amendment 1 (ISO 22718:2015/Amd 1:2022)
• Effective Date: 28-Jan-2026
• Refers: EN ISO 16773-4:2017 - Electrochemical impedance spectroscopy (EIS) on coated and uncoated metallic specimens - Part 4: Examples of spectra of polymer-coated and uncoated specimens (ISO 16773-4:2017)
• Effective Date: 28-Jan-2026
• Referred By: EN ISO 18563-3:2024 - Non-destructive testing - Characterization and verification of ultrasonic phased array equipment - Part 3: Complete systems (ISO 18563-3:2024)
• Effective Date: 28-Jan-2026
• Referred By: EN ISO 23864:2021 - Non‐destructive testing of welds - Ultrasonic testing - Use of automated total focusing technique (TFM) and related technologies (ISO 23864:2021)
• Effective Date: 28-Jan-2026
• Referred By: EN ISO 4761:2022 - Non-destructive testing of welds - Phased array ultrasonic testing (UT-PA) for thin-walled steel components - Acceptance levels (ISO 4761:2022)
• Effective Date: 28-Jan-2026
• Referred By: EN ISO 18563-2:2024 - Non-destructive testing - Characterization and verification of ultrasonic phased array equipment - Part 2: Array probes (ISO 18563-2:2024)
• Effective Date: 28-Jan-2026

Overview

EN ISO 3262-8:2023 - Extenders - Specifications and Methods of Test - Part 8: Natural Clay is an internationally recognized European standard developed by CEN and ISO. This standard specifies the essential requirements and corresponding test methods for natural clay, particularly its role as an extender in pigments and related industrial applications. The document provides consistent criteria for quality assurance and assessment, ensuring that natural clay products meet industry and regulatory expectations. The 2023 edition replaces the previous 1999 version, aligning testing methodologies and terminology with current international practices.

Key Topics

EN ISO 3262-8:2023 addresses several core aspects critical to material performance and process reliability for natural clay:

• Definitions and Scope: Establishes natural clay as naturally occurring hydrated aluminium silicates with lamellar crystal structures, mainly kaolinite.
• Essential Requirements: Sets minimum standards for particle size distribution, kaolinite content, residue on sieve, matter volatile at 105°C, loss on ignition, water solubility, and pH of suspension.
• Test Methods: References validated analytical procedures such as sedimentation (Andreasen method), X-ray diffraction, laser diffraction (ISO 8130-13), and other ISO standardized tests for clay evaluation.
• Conditional Requirements: Offers additional criteria for properties such as color, lightness, and electrical resistivity of aqueous extracts, to be agreed by relevant parties if specified.
• Sampling and Reporting: Describes representative sampling procedures (ISO 15528) and the mandatory elements for test reports to ensure traceability and reproducibility.

Applications

Natural clay is widely used as an extender in the production of paints, coatings, plastics, rubber, and ceramics. EN ISO 3262-8:2023 is directly applicable to:

• Paints and Coatings Manufacturing: Quality assurance of raw materials to ensure the performance of finished products, such as opacity, brightness, and durability.
• Industrial Compounds: Consistent specification of extenders in formulations for plastics and rubber, where particle size distribution and moisture content impact final properties.
• Ceramic and Construction Materials: Validation of natural clay suitability for bricks, tiles, and other ceramic products via standardized tests for mineral content and physical properties.
• Supply Chain and Procurement: Establishing clear technical standards for buyer-supplier agreements, minimizing disputes and ensuring interoperability between international markets.

Related Standards

EN ISO 3262-8:2023 is one part of a comprehensive series on extenders. Relevant related standards include:

• ISO 3262-1: Extenders - Specifications and Methods of Test - Part 1: Introduction and general test methods
• ISO 787 Series: General methods of test for pigments and extenders, including test methods for volatile matter (ISO 787-2), water solubility (ISO 787-3), residue on sieve (ISO 787-7), pH value (ISO 787-9), and resistivity of aqueous extract (ISO 787-14)
• ISO 8130-13: Coating powders - Particle size analysis by laser diffraction
• ISO 15528: Paints, varnishes, and raw materials for paints and varnishes - Sampling
• ISO 18451-1: Pigments, dyestuffs and extenders - Terminology

Adoption and consistent application of EN ISO 3262-8:2023 support regulatory compliance, product performance, and reliable trade across industries using natural clay extenders. This standard is essential for manufacturers, laboratories, and procurement professionals focused on pigment and extender quality.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2023
Nadomešča:
SIST EN ISO 3262-8:2000
Polnila - Specifikacije in preskusne metode - 8. del: Naravni kaolin (ISO 3262-
8:2023)
Extenders - Specifications and methods of test - Part 8: Natural clay (ISO 3262-8:2023)
Füllstoffe - Anforderungen und Prüfverfahren - Teil 8: Natürlicher Kaolin (ISO 3262-
8:2023)
Matières de charge - Spécifications et méthodes d'essai - Partie 8: Argile naturel (ISO
3262-8:2023)
Ta slovenski standard je istoveten z: EN ISO 3262-8:2023
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 3262-8
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2023
EUROPÄISCHE NORM
ICS 87.060.10 Supersedes EN ISO 3262-8:1999
English Version
Extenders - Specifications and methods of test - Part 8:
Natural clay (ISO 3262-8:2023)
Matières de charge - Spécifications et méthodes d'essai Füllstoffe - Anforderungen und Prüfverfahren - Teil 8:
- Partie 8: Argile naturelle (ISO 3262-8:2023) Natürlicher Kaolin (ISO 3262-8:2023)
This European Standard was approved by CEN on 22 March 2023.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3262-8:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 3262-8:2023) has been prepared by Technical Committee ISO/TC 256
"Pigments, dyestuffs and extenders" 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 December 2023, and conflicting national standards
shall be withdrawn at the latest by December 2023.
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.
This document supersedes EN ISO 3262-8:1999.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 3262-8:2023 has been approved by CEN as EN ISO 3262-8:2023 without any
modification.
INTERNATIONAL ISO
STANDARD 3262-8
Second edition
2023-05
Extenders — Specifications and
methods of test —
Part 8:
Natural clay
Matières de charge — Spécifications et méthodes d'essai —
Partie 8: Argile naturelle
Reference number
ISO 3262-8:2023(E)
ISO 3262-8:2023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 3262-8:2023(E)
Contents  Page
Foreword .iv
1  Scope . 1
2  Normative references . 1
3  Terms and definitions . 1
4  Requirements and test methods . 2
5  Sampling . 2
6  Determination of silica content . 3
6.1 General . 3
6.2 Principle . 3
6.3 Reagents . 3
6.4 Apparatus . 3
6.5 Preparation for the test . 5
6.5.1 Calibration of pipette. 5
6.5.2 Calibration of sedimentation vessel . 5
6.6 Procedure . 5
6.6.1 Number of determinations . 5
6.6.2 Test portion . 5
6.6.3 Sedimentation . 5
6.6.4 Calculation of withdrawal time. 6
6.7 Calculation of cumulative percentage undersize . 6
6.8 Acceptance of test values . 6
6.9 Expression of results . . 7
7  Test report . 7
Bibliography . 8
iii
ISO 3262-8:2023(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO document should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
patent rights in respect thereof. As of the date of publication of this document, ISO had not received
notice of (a) patent(s) which may be required to implement this document. However, implementers are
cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all
such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 256, Pigments, dyestuffs and extenders, in
collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC
298, Pigments and extenders, in accordance with the Agreement on technical cooperation between ISO
and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 3262-8:1999), which has been technically
revised.
The main changes are as follows:
— the first part of the title has been changed to “Extenders”;
— the test method for particle size distribution in Table 2 has been changed to ISO 8130-13;
— the normative references have been updated.
A list of all parts in the ISO 3262 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
INTERNATIONAL STANDARD ISO 3262-8:2023(E)
Extenders — Specifications and methods of test —
Part 8:
Natural clay
1  Scope
This document specifies requirements and corresponding methods of test for natural clay.
2  Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
u
...