ISO 17130:2021 Leather — Physical and mechanical tests — Determination of dimensional change

ISO 17130:2021 Leather — Physical and mechanical tests — Determination of dimensional change.
1 Scope
This document specifies a method of determining the dimensional change (shrinkage) of leathers
caused by ageing. It is applicable to all leathers.
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 105-806, Textiles — Tests for colourfastness — Part 806: Colour fastne.ss and ageing to artificiallqht at high temperatures: 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 17228:2015, Leather — Tests for colourfastness — Change in colour with accelerated ageing
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and TEC maintain terminological databases for use in standardization at the following addresses:
ISO Online browsing platform: available at https://wwwiso.orgfohp
— IEC Electropedia: available at http://www.electropedia.org/
4 Principle
A conditioned test piece is aged using the conditions defined in ISO 17228. The shrinkage is determined after reconditioning.
5 Apparatus and materials
5.1 Oven, as specified in ISO 17228.
5.2 Climate chaniber, as specified in ISO 17228.
5.3 Vernier calliper, reading to 0,1 mm.
5.4 Support, glass plate or suitable stainless-steel mesh, that keeps the test piece flat. Support shall be covered with a polyester nonwoven fabric, as specified in ISO 105-806, to prevent the test piece from sticking.
5.6 Indelible marker or needle with a diameter less than or equal to 1 mm.
6 Sampling and sample preparation
6.1 Sample in accordance with ISO 2418. Cut at least two test pieces (150 × 150) mm for each of the ageing conditions required, by applying the press knife (5.5) to the grain surface, if distinguishable.
For some applications, it can be necessary to use larger test pieces, for example (300 × 300) mm to enhance the accuracy, especially in the case of low shrinkage.
6.2 Using an indelible marker or needle (5.6), mark four measurement reference points, A, B, C and D, on the test pieces such that they form a square having sides of (100 ± 1) mm as shown in Figure 1.
ISO 17130 pdf download.