ISO/FDIS 6591-1

ISO/DISFDIS 6591-1:2025(en)
ISO/TC 122/SC 3
Secretariat: BSI
Date: 2025-09-242026-01-15
Packaging — Dimensions and method of measurement —
Part 1:
Empty paper sacks
Emballages — Dimensions et méthode de mesurage —
Partie 1: Sacs vides en papier
FDIS stage
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ISO/WD FDIS 6591-1:2025(E2026(en)
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ISO/DISFDIS 6591-1:20252026(en)
Contents
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Dimensions . 3
4.1 General . 3
4.2 Valve position . 13
5 Apparatus . 15
6 Sampling . 15
7 Procedure . 16
8 Test report . 16

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ISO/WD FDIS 6591-1:2025(E2026(en)
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 documentdocuments 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s)
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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related to conformity assessment, as well as information about ISO'sISO’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 122, Packaging, Subcommittee SC 3,
Performance requirements and tests for means of packaging, packages and unit loads (as required by ISO/TC
122),, in collaboration with the European Committee for Standardization (CEN) Technical Committee
CEN/TC 261, Packaging, in accordance with the Agreement on technical cooperation between ISO and CEN
(Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 6591-1:1984), which has been technically
revised.
The main changes are as follows:
— figures have been updated and supplemented with additional details to improve clarity and accuracy;
— specific procedural requirements have been clarified for sacks with and without a moisture barrier;
— the test report has been enhanced with additional information requirements.
A list of all parts in the ISO 6591 series can be found on the ISO website.
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.
This second edition cancels and replaces the first edition (ISO 6591-1:1984), which has been technically
revised.
The main changes are as follows:
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ISO/DISFDIS 6591-1:20252026(en)
— — General editorial changes have been made to the document in line with ISO/IEC Directives Part 2;
A list of all parts in the ISO 6591 series can be found on the ISO website.
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 .
v
DRAFT International Standard ISO/DIS 6591-1:2025(en)

Packaging — Dimensions and method of measurement — —
Part 1:
Empty paper sacks
1 Scope
This document specifies the dimensions of empty paper sacks and specifies a method of measuring those
dimensions.
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.
EN ISO 6590--1, Packaging — Vocabulary — Part 1: Paper sacks
EN ISO 6599--1, Packaging — Conditioning for testing — Part 1: Paper sacks
ISO 7023, Packaging — Sacks — Method of sampling empty sacks for testing
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 6590-1 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— — ISO Online browsing platform: available at https://www.iso.org/obp
— — IEC Electropedia: available at https://www.electropedia.org/
3.1 3.1
length of sack
a
distance between the transverse edges of the sack, measured at the sack centre, perpendicular to the bottom
3.2
3.2
width of sack
b
distance between the longitudinal edges of the sack, measured at the sack centre, parallel to the bottom
3.3 3.3
width of bottom
c
distance between the two bottom edge-folds, measured at the centre, parallel to sack length
Note 1 to entry: In case of valved sacks, the bottoms will be defined as “c1””, the bottom, where the valve will be placed,
and “c2”, the other bottom.
3.4 3.4
width of gusset
e
distance between the two external edge-folds of the opened-out gusset
Note 1 to entry: ½ width of gusset corresponds to the gusset depth.
3.5 3.5
width of valve opening
g
internal dimension of the valve opening between the valve edge-folds or, in the case of a sewn sack, between
the valve edge-fold and the adjacent stitch line
3.6 3.6
length of valve
f
3.6.1
length
...