ISO 2758 is an ISO test method for determining the bursting strength of paper by applying increasing hydraulic pressure until rupture.
It is commonly used in paper manufacturing and converting QA/QC to compare lots, qualify grades, and verify that incoming paper meets performance targets. If you need help matching the right edition or confirming whether ISO 2758 fits your product (paper vs. board), talk with our team.
ISO 2758: Paper — Determination of bursting strength
ISO 2758 specifies a laboratory method for measuring the pressure required to burst a sheet of paper using a hydraulic, diaphragm-type bursting test apparatus.
This standard is intended for paper within a defined bursting-strength range and is not intended for certain combined-board components where a different ISO method is more suitable.
Quick Definition
ISO 2758 measures paper “bursting strength” as the hydraulic pressure at rupture when the test piece is clamped and stressed by an expanding diaphragm.
What This Standard Covers
ISO 2758 covers determination of bursting strength for paper tested under increasing hydraulic pressure using a diaphragm bursting method.
Applicability: It applies to paper with bursting strength in the range of 70 kPa to 1 400 kPa.
Not intended for: It is not intended to be used for components (such as fluting medium or linerboard) of a combined board; ISO 2759 is identified as more suitable for that use case.
Why This Standard Matters in Testing
Bursting strength is a fast, production-friendly indicator of how a paper grade resists rupture under multi-directional stress. Many mills and converters use it as a routine check to support supplier qualification, process control, and acceptance testing.
Because the result depends on the test apparatus setup and the standard’s specified conditions, aligning the lab’s instrument configuration and reporting format to the cited edition is important when comparing results between sites.
Common Materials, Product Types, or Applications Covered
ISO 2758 is used for paper grades where bursting resistance is a meaningful performance requirement.
Common use cases: Mill QC testing, incoming inspection at converters, and comparative evaluation of paper grades where burst performance is specified internally or by customer requirement.
Common Test or Verification Workflow
ISO 2758 is typically run as a standardized lab check with repeat testing across specimens to produce a representative bursting strength value for the sample.
Common workflow: Sample selection from a lot → conditioning per lab practice and any referenced requirements → clamping in a bursting-strength tester → hydraulic pressure increase to rupture → record bursting pressure and report results in the required units and format.
Equipment Commonly Used for This Standard
ISO 2758 testing is commonly performed on a diaphragm-type paper bursting strength tester (often referred to as a Mullen-type burst tester) that applies increasing hydraulic pressure to the clamped specimen until rupture.
Typical equipment elements: Bursting strength tester with hydraulic pressure generation, a compliant diaphragm, a defined clamping system, and pressure measurement/control appropriate to the required test range.
Practical quoting note: When selecting or quoting a system, the key decisions are usually pressure range (to cover the paper grades you run), clamping/fixture suitability, calibration approach, and throughput features needed for routine QC. If you are comparing configurations, you can request a detailed quote for a setup matched to your sample range and lab volume.
How to Read This Designation or Revision
ISO standards are commonly cited as “ISO 2758” (standard number) and may include a year-based edition, such as ISO 2758:2014.
Equipment setup details and reporting expectations can vary by edition, so purchase specifications, customer documents, or regulatory references should be checked for the exact cited year/edition before finalizing a lab procedure or instrument configuration.
Related Standards, Methods, or Frameworks
ISO 2758 is specific to paper. For burst testing of certain combined-board components (such as fluting medium or linerboard), ISO references ISO 2759 as the more suitable method.
Get help selecting an ISO 2758 test setup
If you need to align a burst tester configuration to the exact ISO 2758 edition your customer cites (including pressure range and fixture needs), contact our team to discuss your paper grades and QC workflow.