ISO 14931:2021 Leather — Leather for apparel (excluding furs) — Specifications and sampling procedures

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Leather — Leather for apparel (excluding furs) — Specifications and sampling procedures

1 Scope

This document gives recommended values and related test methods for apparel leather, excluding furs. It also specifies the sampling and conditioning procedures of laboratory samples.

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.

ISO 105-B02, Textiles — Tests for colour fastness — Part B02: Colour fastness to artificial light: Xenon arc fading lamp test

ISO 2418, Leather — Chemical, physical and mechanical and fastness tests — Sampling location

ISO 2419, Leather — Physical and mechanical tests — Sample preparation and conditioning

ISO 2588, Leather — Sampling — Number of items for a gross sample

ISO 3376, Leather — Physical and mechanical tests — Determination of tensile strength and percentage elongation

ISO 3377-1, Leather — Physical and mechanical tests — Determination of tear load — Part 1: Single edge tear

ISO 4044, Leather — Chemical tests — Preparation of chemical test samples

ISO 4045, Leather — Chemical tests — Determination of pH and difference figure

ISO 5402-1, Leather — Determination of flex resistance — Part 1: Flexometer method

ISO 11640, Leather — Tests for colour fastness — Colour fastness to cycles of to-and-fro rubbing

ISO 11642, Leather — Tests for colour fastness — Colour fastness to water

ISO 11643, Leather — Tests for colour fastness — Colour fastness of small samples to solvents

ISO 11644, Leather — Test for adhesion of finish

ISO 15700, Leather — Tests for colour fastness — Colour fastness to water spotting

ISO 17070, Leather — Chemical tests — Determination of tetrachlorophenol-, trichlorophenol-, dichlorophenol-, monochlorophenol-isomers and pentachlorophenol content

ISO 17075-1, Leather — Chemical determination of chromium(VI) content in leather — Part 1: Colorimetric method

ISO 17075-2, Leather — Chemical determination of chromium(VI) content in leather — Part 2: Chromatographic method

ISO 17186, Leather — Physical and mechanical tests — Determination of surface coating thickness

ISO 17226-1, Leather — Chemical determination of formaldehyde content — Part 1: Method using high-

performance liquid chromatography

ISO 17233, Leather — Physical and mechanical tests — Determination of cold crack temperature of surface coatings

ISO 17234-1, Leather — Chemical tests for the determination of certain azo colourants in dyed leathers — Part 1: Determination of certain aromatic amines derived from azo colourants

ISO 17234-2, Leather — Chemical tests for the determination of certain azo colorants in dyed leathers — Part 2: Determination of 4-aminoazobenzene

ISO 23910, Leather — Physical and mechanical tests — Measurement of stitch tear resistance

3 Terms and definitions

No terms and definitions are listed in this document.

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

— ISO Online browsing platform: available at https:// www .iso .org/ obp

— IEC Electropedia: available at http:// www .electropedia. org/ 4 Sampling

4.1 When possible, the location and identification of laboratory samples shall be in accordance with ISO 2418.

4.2 The number of samples shall be by agreement between the interested parties, except in cases of dispute, when the number of samples shall be in accordance with ISO 2588. If the lot size of the leathers is high, the maximum number of samples shall be five.

5 Sample conditioning and preparation

5.1 Laboratory samples for physical, mechanical and fastness tests shall be conditioned and prepared in accordance with ISO 2419.

5.2 Laboratory samples for chemical tests shall be conditioned and prepared in accordance with ISO 4044.

6 Characteristics, test methods and recommended values

Table 1 and Table 2 show the characteristics, test methods and recommended values for different types of leather intended for apparel. The essential characteristics in Table 1 shall all be taken into account, even if they can have different relative weights in the process of evaluation relative to use. The subsidiary characteristics in Table 2 shall be agreed by the parties concerned according to the intended use of the leather.

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