ISO 3262-12:2023

Extenders - Specifications and methods of test - Part 12: Muscovite-type mica

This document specifies requirements and corresponding methods of test for muscovite-type mica.

Matières de charge — Spécifications et méthodes d’essai — Partie 12: Mica de type muscovite

Le présent document spécifie les exigences relatives au mica de type muscovite et les méthodes d'essai correspondantes.

General Information

• Status: Published
• Publication Date: 25-Jun-2023
• ICS: 87.060.10 - Pigments and extenders
• Technical Committee: ISO/TC 256 - Pigments, dyestuffs and extenders
• Drafting Committee: ISO/TC 256 - Pigments, dyestuffs and extenders
• Current Stage: 6060 - International Standard published
• Start Date: 26-Jun-2023
• Due Date: 25-May-2025
• Completion Date: 26-Jun-2023

Relations

• Revises: ISO 3262-12:2001 - Extenders for paints - Specifications and methods of test - Part 12: Muscovite-type mica
• Effective Date: 06-Jun-2022

Overview

ISO 3262-12:2023 - "Extenders - Specifications and methods of test - Part 12: Muscovite-type mica" specifies the requirements and test methods for muscovite-type mica used as an extender. Published as the second edition (2023), it updates the 2001 version, aligns terminology with ISO 18451-1, and harmonizes test methods with other ISO standards. The document is intended for manufacturers, quality laboratories, purchasers and specifiers of extenders and pigment-grade micas.

Key topics and technical requirements

The standard defines essential and conditional requirements together with the designated test methods:

• Scope: Requirements and corresponding methods of test for muscovite-type mica.
• Composition limits (mass fraction ranges):
  • K2O: 9 to 12 %
  • Al2O3: 30 to 40 %
  • SiO2: 43 to 49 %
  • Fe2O3: max. 3.5 %
  • MgO: max. 1 %
• Physical and chemical limits:
  • Matter volatile at 105 °C: max 1 % (ISO 787-2)
  • Loss on ignition: max 6.5 % (ISO 3262-1)
  • Matter soluble in water (hot extraction): max 0.5 % (ISO 787-3)
  • pH of aqueous suspension: 6 to 9 (ISO 787-9)
• Conditional characteristics (to be agreed by parties):
  • Residue on sieve (ISO 787-7 or ISO 787-18)
  • Particle size distribution (instrumental method - ISO 8130-13)
  • Colour and lightness
  • Resistivity of aqueous extract (ISO 787-14)
• Test report requirements: identification of product, reference to ISO 3262-12:2023, test results and methods, compliance status, deviations, anomalies, and test dates.

Applications and users

ISO 3262-12:2023 is relevant to organizations that produce, test, specify or buy muscovite-type mica as an extender in pigment and formulation industries. Typical users include:

• Quality control and R&D laboratories in pigment and extender manufacturing
• Suppliers and purchasers of muscovite mica for coatings, plastics, adhesives, rubbers and related formulations
• Standards and compliance teams ensuring materials meet agreed specification limits

Using this standard helps ensure consistent product quality, reproducible test results and clear contractual specifications between suppliers and customers.

Related standards

Relevant normative references cited in ISO 3262-12:2023 include:

• ISO 3262-1 (general test methods for extenders)
• ISO 787 series (parts 2, 3, 7, 9, 14, 18) - general methods of test for pigments and extenders
• ISO 8130-13 (particle size distribution)
• ISO 18451-1 (terminology)

Keywords: ISO 3262-12:2023, muscovite-type mica, muscovite mica, extenders, specifications, test methods, particle size, pH, loss on ignition, pigments and extenders.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 3262-12
Second edition
2023-06
Extenders — Specifications and
methods of test —
Part 12:
Muscovite-type mica
Matières de charge — Spécifications et méthodes d’essai —
Partie 12: Mica de type muscovite
Reference number
ISO 3262-12:2023(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 3262-12:2023(E)
Contents  Page
Foreword .iv
1  Scope .1
2  Normative references .1
3  Terms and definitions .1
4  Requirements and test methods . 2
5  Test report . 2
Bibliography . 3
iii
ISO 3262-12:2023(E)
Foreword
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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 canc
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