ISO 11643:2009 皮革—耐変色性のテスト—少量のサンプルの溶剤に対する耐変色性 | ページ 2

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.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, 2.

The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 11643/IUF 434 was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 289, Leather, in collaboration with the Fastness Tests Commission of the International Union of Leather Technologists and Chemists Societies (IUF Commision, IULTCS), in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement). It is based on IUF 434 published in J. Soc. Leather Tech. Chem., 75 , pp. 30–32, 1991, and was declared an official method of the IULTCS in September 1991.

IULTCS, originally formed in 1897, is a world-wide organization of professional leather societies to further the advancement of leather science and technology. IULTCS has three Commissions, which are responsible for establishing international methods for the sampling and testing of leather. ISO recognizes IULTCS as an international standardizing body for the preparation of test methods for leather.

This second edition cancels and replaces the first edition (ISO 11643:1993), which has been technically revised. The change in the title, from Leather — Tests for colour fastness — Colour fastness of small samples to dry-cleaning solutionstoLeather — Tests for colour fastness — Colour fastness of small samples to solvents, reflects the changes in the technology of dry cleaning from solvent-based to water-based processes. This edition includes an option to use a petroleum hydrocarbon solvent.

Introduction

The testing of leather to determine its colour fastness to solvents can be done in several ways to achieve different aims. Small leather samples can be tested to assess the fastness to solvents of leather dyes and finishes, or of the finished leather itself.

The test method specified in this International Standard covers only the testing of small leather samples, in the absence of any other materials (accessories, adhesives, etc.), that can influence the cleanability with solvents of the finished article. Moreover, it does not consider changes in leather properties, such as the handling characteristics or area stability, as the samples are too small. It must not therefore be used to provide guidance as to the process to be employed for cleaning or spot and stain removal with solvents on complete garments.

Part of the colour of leather is due to the oil content. When treated with solvents some of the colour change is due to the loss of oil into the solvent. The objective of the treatment with triolein is to restore the colour due to changes in the oil content of the leather. The method with one level of triolein can give a guideline for re-oiling. Since different leathers can have different oil contents, a range of re-oiling tests would be necessary to establish the correct re-oiling level.

1 Scope

This International Standard specifies a method for determining the resistance to solvent solutions of the colour and finish of unused, and not yet cleaned, leather. It does not cover composite materials or complete leather garments. It is not intended to be used to give any guidance on the process to be employed for cleaning garments.

During the test, the colour of the leather can change and the adjacent fabric used can become stained. Additionally, the finish of the leather can be damaged.

The presence of absorbed water in the leather, adjacent fabric or solvent has not been found to be a critical factor in assessing the colour fastness.

2 Normative references

The following referenced documents are indispensable for the application 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.