Leather — Crust full chrome upper leather — Specifications and test methods

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).

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General Information

Status
Published
Publication Date
05-Apr-2021
Current Stage
6060 - International Standard published
Start Date
06-Apr-2021
Completion Date
06-Apr-2021
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ISO 20940:2021 - Leather -- Crust full chrome upper leather -- Specifications and test methods
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INTERNATIONAL ISO
STANDARD 20940
First edition
2021-04
Leather — Crust full chrome upper
leather — Specifications and test
methods
Reference number
ISO 20940:2021(E)
ISO 2021
---------------------- Page: 1 ----------------------
ISO 20940:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 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
---------------------- Page: 3 ----------------------
ISO 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

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.

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

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/

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
---------------------- Page: 4 ----------------------
ISO 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
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 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 3377-2, 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 in dichloromethane and free fatty

acid content

ISO 5398-1, Leather — Chemical determination of chromic oxide content — Part 1: Quantification by

titration

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

ISO 11640, Leather — Tests for colour fastness — C
...

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
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 20940:2021(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2021
---------------------- Page: 1 ----------------------
ISO/FDIS 20940:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH­1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 2 ----------------------
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
---------------------- Page: 3 ----------------------
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

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 non­governmental, 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.

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

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/

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
---------------------- Page: 4 ----------------------
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
---------------------- Page: 5 ----------------------
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
...

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