ISO 3262-8:2023 PDF

Extenders — Specifications and methods of test — Part 8: Natural clay

Название (английский):

ISO 3262-8:2023

Extenders — Specifications and methods of test — Part 8: Natural clay

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 8
Дата публикации:: 31 мая 2023 г.
Издание:: ISO IS 3262 edition 2 version 1
ICS:: 87.060.10

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Описание (английский):

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

Технические детали

Технический комитет: ISO/TC 256 - Pigments, dyestuffs and extenders
SKU: ISO 3262-8:2023

Abstract

Overview

ISO 3262-8:2023 - Extenders: Specifications and methods of test - Part 8: Natural clay specifies requirements and corresponding test methods for naturally occurring hydrated aluminium silicates (primarily kaolinite) used as extenders. This second edition updates test references and presents the Andreasen method as the referee procedure for particle-size distribution. The standard covers composition limits, physical fractions, sampling and detailed laboratory procedures needed to demonstrate conformity.

Key topics and requirements

Scope and definitions - Natural clay defined as hydrated aluminium silicates with lamellar crystal structure (predominantly kaolinite).
Grades and essential requirements (Table 1) - Typical requirements by grade include:
- Kaolinite content: Grade A ≥ 90%; Grade B ≥ 85%; Grade C ≥ 70%; Grade D ≥ 50% (by X‑ray diffraction or agreed method).
- Residue on 45 µm sieve: max 0.02–0.5% depending on grade (ISO 787-7).
- Particle-size distribution (Andreasen method) - percentage

Overview

Key topics and requirements

Scope and definitions - Natural clay defined as hydrated aluminium silicates with lamellar crystal structure (predominantly kaolinite).
Grades and essential requirements (Table 1) - Typical requirements by grade include:
- Kaolinite content: Grade A ≥ 90%; Grade B ≥ 85%; Grade C ≥ 70%; Grade D ≥ 50% (by X‑ray diffraction or agreed method).
- Residue on 45 µm sieve: max 0.02–0.5% depending on grade (ISO 787-7).
- Particle-size distribution (Andreasen method) - percentage

ISO 3262-8:2023 PDF

Технические детали

Abstract

Overview

Key topics and requirements

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Abstract

Overview

Key topics and requirements

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