EN ISO 6599-1:2026

• Abstract:

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

• Status: Published
• Publication Date: 04-Aug-2026
• ICS: 55.080 - Sacks. Bags
• Technical Committee: CEN/TC 261 - Packaging
• Drafting Committee: CEN/TC 261/SC 5/WG 26 - Packages made from flexible materials (e.g. flexible plastics, plastic laminates, paper/board laminated, metal foil laminates, textiles)
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 05-Aug-2026
• Completion Date: 05-Aug-2026
• Ref Project: SIST EN ISO 6599-1:2026 - Packaging - Conditioning for testing - Part 1: Paper sacks (ISO 6599-1:2026)

• Replaces: EN 26599-1:1992 - Packaging - Sacks - Conditioning for testing - Part 1: Paper sacks (ISO 6599-1:1983)
• Effective Date: 25-Jun-2025
• Refers: ISO 187:2022 - Paper, board and pulps — Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples
• Effective Date: 26-Aug-2026
• Refers: ISO 6590-1:2025 - Packaging — Vocabulary — Part 1: Paper sacks
• Effective Date: 26-Aug-2026
• Consolidated By: ISO 6599-1:2026 - Packaging — Conditioning for testing — Part 1: Paper sacks
• Effective Date: 12-Feb-2026

Overview

EN ISO 6599-1:2026 - Packaging - Conditioning for testing - Part 1: Paper sacks is a key international standard developed by CEN and ISO. This document defines the conditioning atmospheres and the prescribed procedures for conditioning samples of intact, empty paper sacks before and during testing. Proper conditioning ensures that all paper sacks tested are in a consistent physical state, allowing for accurate and comparable test results. Moisture content and temperature have a significant impact on the physical properties of paper, making this standard vital for reliable packaging testing and performance assessments.

Key Topics

• Conditioning Atmospheres: Specifies standardized temperature and humidity levels, including preferred atmospheres such as 23°C/50% RH, to equilibrate paper sack samples before testing.
• Conditioning Method: Outlines how to suspend and expose sacks to controlled conditions to achieve equilibrium between the sack’s materials and the atmosphere.
• Minimum Conditioning Periods:
  • At least 24 hours for sacks without barrier plies.
  • At least 7 days for sacks with one or more barrier plies, due to different moisture absorption characteristics.
• Equipment Requirements:
  • Conditioning rooms equipped with precise temperature and humidity control systems.
  • Use of calibrated instruments for monitoring and recording environmental conditions.
• Reporting Requirements:
  • Documents the atmosphere used, the conditioning duration, and any deviations or observations during the process.

Applications

This standard has broad practical applications for laboratories, manufacturers, and quality assurance in the packaging industry, specifically for paper sacks. Key uses include:

• Testing Consistency: By bringing all samples to a standardized state, test results such as strength, durability, and moisture resistance become reliably comparable.
• Product Development: Packaging designers and engineers use this conditioning method to predict how paper sacks will behave in different climates or storage conditions.
• Quality Control: Ensures batches of paper sacks meet specified performance criteria by eliminating variability caused by uncontrolled environmental factors.
• Regulatory Compliance: Helps manufacturers and testing facilities align with both national and international packaging regulations, supporting market access and customer confidence.

Related Standards

EN ISO 6599-1:2026 references and aligns with several other important standards for packaging and material testing:

• ISO 187: Paper, board and pulps - Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples.
• ISO 554: Standard atmospheres for conditioning and/or testing - Specifications.
• ISO 6590-1: Packaging - Vocabulary - Part 1: Paper sacks.

These related standards provide the necessary framework for environmental control, terminology, and test atmosphere requirements that support the consistent conditioning and evaluation of paper-based packaging.

---

By adhering to EN ISO 6599-1:2026, stakeholders in the packaging industry can maintain high standards of testing accuracy and product quality, addressing both technical and regulatory demands for paper sacks used worldwide.

SLOVENSKI STANDARD
01-september-2026
Nadomešča:
SIST EN 26599-1:1997
Embalaža - Kondicioniranje za preskušanje - 1. del: Papirnate vreče (ISO 6599-
1:2026)
Packaging - Conditioning for testing - Part 1: Paper sacks (ISO 6599-1:2026)
Verpackung - Klimatische Vorbehandlung für die Prüfung - Teil 1: Papiersäcke (ISO
6599-1:2026)
Emballages - Conditionnement pour essais - Partie 1: Sacs en papier (ISO 6599-1:2026)
Ta slovenski standard je istoveten z: EN ISO 6599-1:2026
ICS:
55.080 Vreče. Vrečke Sacks. Bags
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 6599-1
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2026
EUROPÄISCHE NORM
ICS 55.080 Supersedes EN 26599-1:1992
English Version
Packaging - Conditioning for testing - Part 1: Paper sacks
(ISO 6599-1:2026)
Emballages - Conditionnement pour essais - Partie 1: Verpackung - Klimatische Vorbehandlung für die
Sacs en papier (ISO 6599-1:2026) Prüfung - Teil 1: Papiersäcke (ISO 6599-1:2026)
This European Standard was approved by CEN on 26 July 2026.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 6599-1:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 6599-1:2026) has been prepared by Technical Committee ISO/TC 122
“Packaging” in collaboration with Technical Committee CEN/TC 261 “Packaging” the secretariat of
which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by February 2027, and conflicting national standards
shall be withdrawn at the latest by February 2027.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 26599-1:1992.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 6599-1:2026 has been approved by CEN as EN ISO 6599-1:2026 without any
modification.
International
Standard
ISO 6599-1
Second edition
Packaging — Conditioning for
2026-07
testing —
Part 1:
Paper sacks
Emballages — Conditionnement pour essais —
Partie 1: Sacs en papier
Reference number
ISO 6599-1:2026(en) © ISO 2026

ISO 6599-1:2026(en)
© ISO 2026
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 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 .
...