ISO 4630:2015 透明な液体—ガードナーカラースケールによる色の推定 | ページ 2

Foreword

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ISO 4630 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 10, Test methods for binders for paints and varnishes, in collaboration with ASTM D 01.34, Naval stores. It has been harmonized with ASTM D 1544-04, Standard test Method for Color of Transparent Liquids (Gardner Color Scale) and ASTM D 6166-12, Standard Test Method for Color of Naval Stores and Related Products (Instrumental Determination of Gardner Color).

This third edition of ISO 4630 cancels and replaces ISO 4630-1:2004 and ISO 4630-2:2004, which have been technically revised. The main changes are:

• a) both standards have been combined into one standard;
• b) the spectrophotometric method (formerly described in ISO 4630-2:2004) is the only one standardized now;
• c) the original visual comparison of colours (formerly described in ISO 4630-1:2004) has been deleted, and the description of manufacture of the original Gardner colour standards has been moved to Annex A.

1 Scope

This International Standard specifies a method for estimating the colour of optically clear, yellow/brownish coloured liquid products by means of the Gardner colour scale using colour-measuring instruments. The method uses the Gardner colour scale described in Annex A.

It is applicable to drying oils, varnishes and solutions of fatty acids, polymerized fatty acids, resins, tall oil, tall oil fatty acids, rosin and related products. The results might be invalid if other products are tested.

The method described provides a more precise way of measuring Gardner colour than a visual sample comparison using human eyes. It is applicable to products having colours from Gardner 1 to Gardner 18. The Gardner scale is not applicable to products with colours darker than 18. For products with colours lighter than Gardner 1 the method specified in ISO 6271 applies.

2 Normative references

The following referenced documents, in whole or in part, are normally referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

Bibliography