ISO 1924 is a legacy (withdrawn) ISO test method for determining the tensile strength of paper and board. It is commonly encountered in older product specifications, mill QC documentation, and historical test reports.
Because ISO 1924 has been withdrawn and later replaced by newer parts in the ISO 1924 series, equipment setup and reporting requirements should be matched to the exact version cited on your documents. If you need help mapping an old callout to a current method, talk with our team.
ISO 1924:1976 — Paper and board — Determination of tensile strength
ISO 1924:1976 is a withdrawn International Standard that defined a laboratory procedure for measuring tensile strength on paper and board specimens using a tensile testing instrument and suitable grips.
In day-to-day testing programs, ISO 1924 is most often referenced as a historical predecessor to newer ISO 1924 series methods for tensile properties.
Quick definition
ISO 1924 is a legacy paper-and-board tensile testing method used to quantify tensile strength. It is withdrawn and generally replaced by later ISO 1924 series parts when current, repeatable tensile property data is required.
What this standard covers
This standard addresses tensile strength measurement for paper and board. In practice, it supports generation of comparable tensile strength results for materials where machine direction (MD) and cross direction (CD) properties are often tracked.
Where a specification requires additional tensile properties (such as strain at break, tensile energy absorption, or stiffness/modulus-related values), the applicable requirements are typically defined in later ISO 1924 series documents rather than ISO 1924:1976.
Why this standard matters in testing
Tensile strength is a core mechanical indicator for paper and board used for product comparison, process stability monitoring, and acceptance decisions. A standards-based tensile method helps reduce variability between labs by controlling key aspects of specimen mounting and tensile loading.
For procurement and qualification, the biggest risk with a withdrawn method is edition mismatch—two “ISO 1924” callouts can lead to different test conditions and outputs depending on what the buyer and supplier assume.
Common materials, product types, or applications covered
Common materials: Paper, linerboard, medium, and other board grades where tensile strength is used as a control property.
Common applications: Paper mill and converting QC, supplier qualification for paper/board inputs, and correlation of tensile behavior to runnability and handling performance.
Common test or verification workflow
A typical ISO 1924-style tensile workflow includes conditioning specimens as required by the controlling quality plan, preparing test strips, aligning and gripping the specimen to avoid slippage or jaw breaks, running a controlled tensile pull to rupture, and reporting tensile strength results for the required directions and number of replicates.
Because ISO 1924:1976 is withdrawn, many labs keep the same overall workflow but execute it under an active ISO 1924 series part that more explicitly defines test speed and additional calculated outputs.
Equipment commonly used for this standard
ISO 1924 testing is typically performed on a materials testing system configured for low-force tensile testing with controlled crosshead motion and grips suitable for thin, flexible sheet materials.
Common equipment: Universal testing machine (single-column or tabletop frame), appropriate load cell for paper/board ranges, pneumatic or mechanical paper grips to reduce slip and jaw breaks, and test software for force/elongation acquisition and reporting.
Common supporting tools: Specimen cutting tools (strip cutter or die), thickness measurement equipment (when required by the reporting basis), and a conditioning environment when the controlling procedure requires standardized humidity/temperature before test.
If you are selecting a tester and grip set for paper/board tensile work, you can request a detailed quote with the force range and grip style matched to your grade and throughput.
How to read this designation or revision
ISO 1924:1976 refers to the 1976 edition of ISO 1924. This edition is withdrawn, so a requirement written only as “ISO 1924” can be ambiguous unless the purchasing document also specifies the year/edition or an equivalent current method.
Practical tip: When a customer or supplier says “ISO 1924,” it often means a current ISO 1924 series part (for example, constant rate of elongation methods). Confirm the exact designation and year before you lock a test plan or purchase equipment.
Related standards, methods, or frameworks
For active ISO tensile testing of paper and board, specifications frequently reference later parts in the ISO 1924 series rather than the withdrawn ISO 1924:1976. Commonly used related documents include ISO 1924-2 (constant rate of elongation method at 20 mm/min) and ISO 1924-3 (constant rate of elongation method at 100 mm/min).
Talk with us about ISO 1924 tensile testing setups
If you are working from an older “ISO 1924” callout and need to align your procedure, outputs, and equipment configuration to the exact requirement, contact our team with the spec language and the material grade.