ISO 8367-1:2026

• Abstract:

  This document specifies a set of tolerances applicable to the manufacture of paper sacks as defined in ISO 6590-1.

• Status: Published
• Publication Date: 20-Jul-2026
• 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: 6060 - International Standard published
• Start Date: 21-Jul-2026
• Due Date: 19-Dec-2026
• Completion Date: 21-Jul-2026

• Consolidates: EN ISO 8367-1:2026 - Packaging - Dimensional tolerances for general purpose sacks - Part 1: Paper sacks (ISO 8367-1:2026)
• Effective Date: 12-Feb-2026
• Consolidates: ISO 1888:2022 - Textile glass — Staple fibres or filaments — Determination of average diameter
• Effective Date: 05-Jul-2025
• Revises: ISO 8367-1:1993 - Packaging — Dimensional tolerances for general purpose sacks — Part 1: Paper sacks
• Effective Date: 21-Jun-2025

ISO 8367-1:2026 is an International Standard from ISO for paper sacks. It specifies dimensional tolerances for the manufacture of paper sacks defined in ISO 6590-1, so manufacturers, test laboratories, and buyers can check whether sacks meet the required size and paper grammage criteria. The document also sets the sampling and measurement references used to verify those tolerances.

What does ISO 8367-1:2026 specify?

ISO 8367-1:2026 applies to paper sacks as defined in ISO 6590-1. It sets the tolerances used to assess sack dimensions and paper grammage, and it organizes those requirements around a general dimensional tolerance clause, a separate grammage clause, and a detailed tolerance table.

The document is structured into:

• Scope
• Normative references
• Terms and definitions
• Dimensional tolerances
• Paper grammage

Table 1 is the core technical table. It links each sack feature to its measurement method and allowable tolerance, which is what production and incoming inspection teams need when they compare a delivered sack against its specification.

What are the key requirements of ISO 8367-1:2026?

ISO 8367-1:2026 ties each check to a specific reference method and then states which sack characteristics must stay within tolerance. In practice, this means you do not judge a sack by eye alone - you sample it, measure it by the named methods, and compare the result with the specified limits.

• Sampling - Paper sacks are sampled according to ISO 7023. This matters because conformity checks must start from a defined sampling method, not an ad hoc selection of sacks.
• Grammage measurement - Paper ply grammage is determined according to ISO 536. This gives a standard way to measure paper mass per unit area before you decide whether the sack build is acceptable.
• PE film thickness - Thickness of the polyethylene (PE) film is measured according to ISO 4593. This matters for sacks that include film, because the tolerance depends on the film thickness range.
• Dimensional measurement - Sack dimensions are described and measured according to ISO 6591-1. That gives a common basis for checking length, width, gussets, valve features, and print position.
• Tolerance table - Table 1 covers single paper ply grammage, single coated paper ply grammage, total paper sack plies grammage, PE film thickness, sack length and width, bottom width, gusset width, circumference with gussets, valve opening, valve length and sleeve dimensions, closure turn-over, space from sack edge to valve sleeve, and print position. In practice, this is the checklist a quality team uses to verify finished sacks.
• Two grammage routes - Clause 5 allows compliance through either individual ply grammage control or total sack paper plies grammage control. This gives producers flexibility when they build sacks from multiple plies.
• Individual ply route - Under Clause 5.2, each paper ply must stay within the specified grammage tolerance. This is the simplest route when the maker controls each ply closely.
• Total grammage route - Under Clause 5.3, the sack must have the specified number of plies, the total grammage must be within tolerance, and each ply must stay within the permitted deviation from its original specification. This is useful when overall build-up is controlled as a system rather than ply by ply.

What terms does ISO 8367-1:2026 define?

ISO 8367-1:2026 uses the terms and definitions from ISO 6590-1. The document also relies on several working terms that readers need to understand when measuring and checking sacks.

• Paper sack - The packaging unit covered by the standard, limited to the paper sacks defined in ISO 6590-1.
• Grammage - The mass per unit area of paper, used here to judge whether a paper ply matches its specification.
• Single paper ply - One paper layer in a sack construction, checked individually in Clause 5.2.
• Single coated paper ply - A paper ply with coating, which has its own tolerance in Table 1.
• PE film - Polyethylene film used in some sack constructions, measured for thickness when present.
• Valve opening - The opening associated with a valve sack, with different tolerance treatment for pasted and sewn sacks.
• Gusset - The folded side or bottom section of a sack, measured as part of the dimensional checks.

Who uses ISO 8367-1:2026?

ISO 8367-1:2026 is used by sack manufacturers, packaging converters, quality managers, laboratory staff, and purchasing teams. Manufacturers use it to set production tolerances, while inspectors and test labs use it to measure sacks and decide whether they conform to the specification.

Buyers and specifiers use the standard when they need to describe what they expect from a paper sack supply. It is also useful for product development and acceptance testing because it gives a shared method for checking size, grammage, and related dimensions.

What changed in ISO 8367-1:2026 from the previous edition?

ISO 8367-1:2026 is the second edition and it replaces ISO 8367-1:1993. The stated changes are:

• a normative reference to ISO 4593 was added for PE film thickness measurement
• the dimensional tolerances in Table 1 were updated
• Table 1 gained a measurement column
• the test report now requires additional information
• Clause 5 was added to clarify grammage tolerances

Which standards are used with ISO 8367-1:2026?

ISO 8367-1:2026 cites these normative references:

• ISO 536 - used to determine paper grammage
• ISO 4593 - used to determine PE film thickness by mechanical scanning
• ISO 6590-1 - provides the vocabulary and definitions for paper sacks
• ISO 6591-1 - provides the dimensions and method of measurement for paper sacks
• ISO 7023 - provides the sampling method for empty sacks used in testing

What does the ISO 8367-1:2026 document contain?

ISO 8367-1:2026 contains one central tolerance table and two grammage compliance routes. Table 1 gives the measurement symbol, the measurement type, and the tolerance for each sack feature, including sack dimensions, valve-related dimensions, print position, grammage, and PE film thickness.

Clause 5 includes worked examples showing how the grammage rules are applied in practice. The document is therefore geared toward measurement, acceptance testing, and specification control rather than design theory.

International
Standard
ISO 8367-1
Second edition
Packaging — Dimensional
2026-07
tolerances for general purpose
sacks —
Part 1:
Paper sacks
Emballages — Tolérances dimensionnelles des sacs d'usage
général —
Partie 1: Sacs en papier
Reference number
© 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
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Dimensional tolerances . 1
5 Paper grammage . 2
5.1 General .2
5.2 Single paper ply grammage .2
5.3 Total sack paper plies grammage .2

iii
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
European Committee for Standardization (CEN) Technical Committee CEN/TC 261, Packaging, in accordance
with the Agreement on technical
...

Norme
internationale
ISO 8367-1
Deuxième édition
Emballages — Tolérances
2026-07
dimensionnelles des sacs d'usage
général —
Partie 1:
Sacs en papier
Packaging — Dimensional tolerances for general purpose
sacks —
Part 1: Paper sacks
Numéro de référence
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2026
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: [phone]
E-mail: [e-mail]
Web: www.iso.org
Publié en Suisse
ii
Sommaire Page
Avant-propos .iv
1 Domaine d'application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Tolérances dimensionnelles . 1
5 Grammage du papier . 2
5.1 Généralités .2
5.2 Grammage d'un seul pli de papier .2
5.3 Grammage total des plis de papier .2

iii
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes nationaux
de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est en général
confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude a le droit de faire
partie du comité technique créé à cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec l'ISO participent également aux travaux. L'ISO collabore étroitement avec
la Commission électrotechnique internationale (IEC) en ce qui concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
critères d'approbation requis pour les différents types de documents ISO. Le présent document a
été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir
www.iso.org/directives).
L’ISO attire l’attention sur le fait que la mise en application du présent document peut entraîner l’utilisation
d’un ou de plusieurs brevets. L’ISO ne prend pas position quant à la preuve, à la validité et à l’applicabilité de
tout droit de brevet revendiqué à cet égard. À la date de publication du présent document, l’ISO n'avait pas
reçu notification qu’un ou plusieurs brevets pouvaient être nécessaires à sa mise en application. Toutefois,
il y a lieu d’avertir les responsables de la mise en application du présent document que des informations
plus récentes sont susceptibles de figurer dans la base de données de brevets, disponible à l'adresse
www.iso.org/brevets. L’ISO ne saurait être tenue pour responsable de ne pas avoir identifié tout ou partie de
tels droits de propriété.
Les appellations commerciales éventuellement mentionnées dans le présent document sont données pour
information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l'ISO liés à l'évaluation de la conformité, ou pour toute information au sujet de l'adhésion de
l'ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles techniques au
commerce (OTC), voir www.iso.org/avant-propos.
Le présent document a été élaboré par le comité ISO/TC 122, Emballages, sous-comité SC 3, Exigences
d’aptitude à l’emploi et méthodes d’essais des procédés d’emballages, des emballages et des charges unitaires,
en collaboration avec le comité technique CEN/TC 261, Emballages, du Comité européen de normalisation
(CEN) conformément à l’Accord de coopération technique entre l’ISO et le CEN (Accord de Vienne).
Cette deuxième édition annule et remplace la première édition (ISO 8367-1:1993), qu
...