ISO 20940:2021

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 20940
ISO/TC 120/SC 2
Leather — Crust full chrome upper
Secretariat: BIS
leather — Specifications and test
Voting begins on:
2021­01­01 methods
Voting terminates on:
2021­02­26
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ISO/FDIS 20940:2021(E)
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©
NATIONAL REGULATIONS. ISO 2021

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ISO/FDIS 20940:2021(E)

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ISO/FDIS 20940:2021(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Characteristics . 3
4.1 Physical characteristics . 3
4.2 Chemical characteristics . 6
5 Sampling . 6
6 Packaging and marking . 6
6.1 Packaging . 6
6.2 Marking . 6
Bibliography . 7
© ISO 2021 – All rights reserved iii

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ISO/FDIS 20940:2021(E)

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
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 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, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
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iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 120, Leather, Subcommittee SC 2, Tanned
leather.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved

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ISO/FDIS 20940:2021(E)

Introduction
Leather is widely used in the footwear industry. Although different tanning agents can be used to
make leather, chromium III is still the most important agent in the tanning of leather for footwear. This
document specifies requirements for various types of crust full chrome upper leather which are used in
the footwear industry for making upper leather.
© ISO 2021 – All rights reserved v

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FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 20940:2021(E)
Leather — Crust full chrome upper leather —
Specifications and test methods
1 Scope
This document specifies requirements, methods of testing and methods of sampling for crust full
chrome upper leather to be used in all types of footwear (see Table 1).
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 2418, Leather — Chemical, physical and mechanical and fastness tests — Sampling location
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 3377­2, Leather — Physical and mechanical tests — Determination of tear load — Part 2: Double
edge tear
ISO 3379, Leather — Determination of distension and strength of surface (Ball burst method)
ISO 4045, Leather — Chemical tests — Determination of pH and difference figure
ISO 4048, Leather — Chemical tests — Determination of matter soluble
...