ISO 6599-1

Packaging — Conditioning for testing — Part 1: Paper sacks

This document specifies the conditioning atmospheres and the method for conditioning samples of intact, empty paper sacks before and during testing.

Emballages — Conditionnement pour essais — Partie 1: Sacs en papier

La présente partie de l'ISO 6599 spécifie les atmosphères et la méthode de conditionnement des échantillons de sacs en papier, intacts et vides, avant et au cours des essais. Si uniquement des essais conventionnels sur papier doivent être faits sur le matériau du sac, des échantillons de matériau doivent être découpés et conditionnés comme spécifié dans l'ISO 187. La présente partie de l'ISO 6599 est applicable à tous les types de sacs en papier, vides, tels que spécifiés dans l'ISO 6590/1.

General Information

• Status: Not Published
• ICS: 55.080 - Sacks. Bags
• Technical Committee: ISO/TC 122/SC 3 - Performance requirements and tests for means of packaging, packages and unit loads (as required by ISO/TC 122)
• Drafting Committee: ISO/TC 122/SC 3/WG 11 - Paper bags and paper sacks
• Current Stage: 6000 - International Standard under publication
• Start Date: 26-Jun-2026
• Completion Date: 27-Jun-2026

Relations

• Consolidates: FprEN ISO 6599-1 - Packaging - Conditioning for testing - Part 1: Paper sacks (ISO/FDIS 6599-1:2026)
• Effective Date: 12-Feb-2026
• Consolidates: ISO/IEC TR 63306-2:2021 - Smart manufacturing standards map (SM2) — Part 2: Catalogue
• Effective Date: 28-Jun-2025
• Revises: ISO 6599-1:1983 - Packaging — Sacks — Conditioning for testing — Part 1: Paper sacks
• Effective Date: 21-Jun-2025

Overview

ISO 6599-1:2026 - Packaging - Conditioning for testing - Part 1: Paper sacks is an international standard published by the International Organization for Standardization (ISO). This standard specifies the required conditioning atmospheres and procedures for conditioning intact, empty paper sacks before and during testing. Ensuring that paper sacks are conditioned under controlled temperature and relative humidity is critical for generating reliable test results, as the physical properties of paper are significantly influenced by moisture content. Adhering to ISO 6599-1 supports consistent product performance evaluation and quality control for manufacturers, testing laboratories, and packaging professionals.

Key Topics

• Conditioning Atmospheres:
  The standard outlines standard atmospheres defined by specific temperature and relative humidity values, such as:

  • 23°C ± 1 / 50% ± 2 RH (preferred atmosphere)
  • 27°C ± 1 / 65% ± 2 RH
  • 20°C ± 1 / 65% ± 2 RH

• Equipment Requirements:

  • Use of a dedicated conditioning room equipped to maintain specified temperature and humidity
  • Automatic controls for stable atmospheric conditions
  • A regularly calibrated recording hygrometer for monitoring

• Conditioning Methods:

  • Proper suspension of sacks for free air circulation, including inner surfaces when possible
  • Omission of preconditioning for certain sack constructions to avoid errors

• Minimum Conditioning Periods:

  • Sacks without barrier plies: at least 24 hours
  • Sacks with barrier plies: at least 7 days

• Test Reporting:

  • Comprehensive documentation, including sample information, conditioning atmosphere, duration, results, deviations, and date of testing

Applications

Implementing ISO 6599-1 is essential for:

• Packaging Manufacturers:
  Standardized conditioning ensures paper sacks are evaluated in a consistent manner before performance, quality, or durability tests. This improves comparability of results and supports robust quality assurance across international markets.

• Testing Laboratories:
  Conditioning in accordance with ISO 6599-1 helps labs produce repeatable and accurate test data for paper sack performance, essential for verifying compliance with customer specifications or regulatory requirements.

• Procurement and Quality Control:
  Buyers and quality assurance professionals can specify ISO 6599-1 in contracts to ensure reliable product testing, facilitating clear communication between manufacturers, suppliers, and clients.

• Research and Development:
  R&D departments involved in improving paper sack materials or designs benefit from a controlled test environment, enabling valid performance comparisons and innovation.

Related Standards

• ISO 187:2022 – Paper, board and pulps - Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples. Provides foundational guidance for conditioning requirements referenced in ISO 6599-1.
• ISO 6590-1 – Packaging - Vocabulary - Part 1: Paper sacks. Offers comprehensive terminology relevant to paper sack packaging and assists in the consistent interpretation of ISO 6599-1.

Practical Value

By mandating defined procedures for conditioning paper sack samples, ISO 6599-1 contributes to accurate, reproducible testing and meaningful quality benchmarking across the packaging industry. This enhances product reliability, facilitates international trade, and underpins safety and performance standards in a wide range of packaging applications. Compliance with ISO 6599-1 demonstrates commitment to quality and provides assurance to partners and customers worldwide.

Standards Content (Sample)

FINAL DRAFT
International
Standard
ISO/FDIS 6599-1
ISO/TC 122/SC 3
Packaging — Conditioning for
Secretariat: BSI
testing —
Voting begins on:
2026-04-30
Part 1:
Paper sacks
Voting terminates on:
2026-06-25
Emballages — Conditionnement pour essais —
Partie 1: Sacs en papier
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
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/CEN PARALLEL PROCESSING 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.
Reference number
ISO/FDIS 6599-1:2026(en) © ISO 2026

FINAL DRAFT
ISO/FDIS 6599-1:2026(en)
International
Standard
ISO/FDIS 6599-1
ISO/TC 122/SC 3
Packaging — Conditioning for
Secretariat: BSI
testing —
Voting begins on:
Part 1:
Paper sacks
Voting terminates on:
Emballages — Conditionnement pour essais —
Partie 1: Sacs en papier
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.
© ISO 2026
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/CEN PARALLEL PROCESSING
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/FDIS 6599-1:2026(en) © ISO 2026

ii
ISO/FDIS 6599-1:2026(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Conditioning atmospheres . 1
4.1 General .1
4.2 Temperature and humidity .2
5 Equipment . 2
5.1 Room and measuring instrumentation .2
5.2 Determination of temperature and relative humidity .2
6 Procedure . 2
6.1 General .2
6.2 Minimum conditioning period for sacks without barrier plies .2
6.3 Minimum conditioning period for sacks with barrier plies .2
7 Test report . 3

iii
ISO/FDIS 6599-1:2026(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 document 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
...

ISO/DIS FDIS 6599-1:2025(en)
ISO/TC 122/SC 3/WG 11
Secretariat: BSI
Date: 2026-02-1304-15
Packaging — Conditioning for testing —
Part 1:
Paper sacks
Emballages — Conditionnement pour essais —
Partie 1: Sacs en papier
FDIS stage
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ISO #####-#:####(X/FDIS 6599-1:2026(en)
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
EmailE-mail: [e-mail]
Website: www.iso.org
Published in Switzerland
© ISO #### 2026 – All rights reserved
ii
ISO/DIS FDIS 6599-1:2026(en)
Contents
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Conditioning atmospheres . 2
4.1 General . 2
4.2 Temperature and humidity . 2
5 Equipment . 2
5.1 Room and measuring instrumentation . 2
5.2 Determination of temperature and relative humidity . 2
6 Procedure . 2
6.1 General . 2
6.2 Minimum conditioning period for sacks without barrier plies . 3
6.3 Minimum conditioning period for sacks with barrier plies . 3
7 Test report . 3

iii
ISO #####-#:####(X/FDIS 6599-1:2026(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 document 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.
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 122, Packaging, Subcommittee SC 3,
Performance requirements and tests for means of packaging, packages and unit loads, in collaboration with the
...

PROJET FINAL
Norme
internationale
ISO/FDIS 6599-1
ISO/TC 122/SC 3
Emballages — Conditionnement
Secrétariat: BSI
pour essais —
Début de vote:
2026-04-30
Partie 1:
Sacs en papier
Vote clos le:
2026-06-25
Packaging — Conditioning for testing —
Part 1: Paper sacks
LES DESTINATAIRES DU PRÉSENT PROJET SONT
INVITÉS À PRÉSENTER, AVEC LEURS OBSERVATIONS,
NOTIFICATION DES DROITS DE PROPRIÉTÉ DONT ILS
AURAIENT ÉVENTUELLEMENT CONNAISSANCE ET À
FOURNIR UNE DOCUMENTATION EXPLICATIVE.
OUTRE LE FAIT D’ÊTRE EXAMINÉS POUR
ÉTABLIR S’ILS SONT ACCEPTABLES À DES FINS
INDUSTRIELLES, TECHNOLOGIQUES ET COM-MERCIALES,
AINSI QUE DU POINT DE VUE DES UTILISATEURS, LES
PROJETS DE NORMES
TRAITEMENT PARALLÈLE ISO/CEN
INTERNATIONALES DOIVENT PARFOIS ÊTRE CONSIDÉRÉS
DU POINT DE VUE DE LEUR POSSI BILITÉ DE DEVENIR DES
NORMES POUVANT
SERVIR DE RÉFÉRENCE DANS LA RÉGLEMENTATION
NATIONALE.
Numéro de référence
ISO/FDIS 6599-1:2026(fr) © ISO 2026

PROJET FINAL
ISO/FDIS 6599-1:2026(fr)
Norme
internationale
ISO/FDIS 6599-1
ISO/TC 122/SC 3
Emballages — Conditionnement
Secrétariat: BSI
pour essais —
Début de vote:
2026-04-30
Partie 1:
Sacs en papier
Vote clos le:
2026-06-25
Packaging — Conditioning for testing —
Part 1: Paper sacks
LES DESTINATAIRES DU PRÉSENT PROJET SONT
INVITÉS À PRÉSENTER, AVEC LEURS OBSERVATIONS,
NOTIFICATION DES DROITS DE PROPRIÉTÉ DONT ILS
DOCUMENT PROTÉGÉ PAR COPYRIGHT AURAIENT ÉVENTUELLEMENT CONNAISSANCE ET À
FOURNIR UNE DOCUMENTATION EXPLICATIVE.
OUTRE LE FAIT D’ÊTRE EXAMINÉS POUR
© ISO 2026
ÉTABLIR S’ILS SONT ACCEPTABLES À DES FINS
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
INDUSTRIELLES, TECHNOLOGIQUES ET COM-MERCIALES,
AINSI QUE DU POINT DE VUE DES UTILISATEURS, LES
publication ne peut êtr
...