ISO 3262-6:2022 エキステンダー — 試験の仕様と方法 — Part 6: 沈降炭酸カルシウム | ページ 2

Foreword

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The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, 1. In particular, the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, 2 (see www.iso.org/directives ).

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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 cancels and replaces the first edition (ISO 3262-6:1998), which has been technically revised.

The main changes are as follows:

• the first part of the title has been changed to “Extenders”;
• the values for CaCO₃ content and loss on ignition have been changed and the range of pH value of aqueous suspension has been expanded in Table 1;
• the test method for lightness has been specified in Table 2;
• a test method, furnace method, for the determination of matter insoluble in hydrochloric acid has been added in Clause 6;
• the normative references have been updated and the text has been editorially revised.

A list of all parts in the ISO 3262 series can be found on the ISO website.

1 Scope

This document specifies requirements and corresponding methods of test for precipitated calcium carbonate.

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 undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 18451-1 and the following apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses: