ISO 7263:2011 covers laboratory evaluation of corrugating medium by measuring flat crush resistance after the paper is fluted using a lab fluter. It is used to compare corrugating-medium performance in a controlled, repeatable way before the material is made into corrugated board.
If you need help matching your internal spec or customer requirement to the correct edition or successor document, talk with our team about your application and citation.
ISO 7263:2011 — Corrugating medium — Determination of the flat crush resistance after laboratory fluting
ISO 7263:2011 is an ISO International Standard focused on measuring the flat crush resistance of corrugating medium after it has been formed into a laboratory flute profile. The intent is to evaluate how the medium performs after fluting, which can be more representative than testing the unfluted sheet alone.
This document is listed by ISO as withdrawn, and later versions are available as split parts for specific flute geometries (A-flute and B-flute).
| Item | What it means for labs |
|---|---|
| Document type | Test method (two methods) for flat crush resistance after lab fluting |
| Property measured | Flat crush resistance of fluted corrugating medium |
| Material scope | Corrugating medium intended for corrugated board manufacture |
| Status | Withdrawn (successor parts exist) |
Quick definition
ISO 7263:2011 in one line: A standardized way to flute corrugating medium in the lab and then measure its flat crush resistance for material comparison and quality control.
What This Standard Covers
ISO 7263:2011 specifies two methods to determine flat crush resistance of corrugating medium after laboratory fluting. The sample is first formed into a flute profile using lab fluting equipment, then loaded in compression to evaluate resistance to crushing in a flat condition.
The standard is intended for corrugating medium used (after fluting) to manufacture corrugated board, supporting material qualification and production quality checks.
Why This Standard Matters in Testing
Corrugating medium performance can change once it is mechanically formed into a flute. By specifying a repeatable lab fluting and flat-crush measurement approach, ISO 7263 helps labs generate comparable data for incoming-material approval, supplier comparison, and ongoing process control.
Practical takeaway: The lab fluter setup and the compression/flat-crush measurement capability typically drive the equipment configuration more than the load capacity alone.
Common Materials, Product Types, or Applications Covered
ISO 7263 is used around paper and packaging workflows where corrugating medium is being selected or monitored for corrugated board manufacturing.
Common applications: Corrugating-medium supplier qualification, mill QA/QC, packaging-converter incoming inspection, and comparative evaluation of medium grades intended for fluting.
Common Test or Verification Workflow
While detailed steps depend on the cited edition and lab practice, ISO 7263 workflows commonly include conditioning of paper specimens, forming the medium on a laboratory fluter, and then measuring flat crush resistance using a compression/flat-crush fixture and defined reporting format.
Common workflow elements: Sample conditioning, laboratory fluting, flat crush loading, and reporting of flat crush resistance for comparison/acceptance decisions.
Equipment Commonly Used for This Standard
ISO 7263 typically points to a short equipment chain: (1) a laboratory fluter to form the corrugating medium into a controlled flute profile, and (2) a compression/flat-crush test system (or dedicated flat crush tester) to apply the load and record the result.
Common equipment: Laboratory fluter (corrugating medium fluting device), compression/flat-crush tester with appropriate platens/fixture, specimen cutting tools, and a conditioning environment appropriate for paper testing.
If you are selecting or upgrading a lab fluter and flat-crush setup, you can request pricing for an ISO 7263-oriented configuration based on your throughput and reporting needs.
How to Read This Designation or Revision
ISO 7263:2011 indicates the ISO standard number (7263) and the publication year (2011). ISO identifies this edition as withdrawn, with newer part standards available for specific flute geometries.
Revision sensitivity: For procurement, quoting, or compliance documentation, make sure the requirement is cited to the exact document (and part) required by your customer or internal specification, because the ISO 7263 family later split into separate parts.
Related Standards, Methods, or Frameworks
ISO has issued successor documents that split the method by flute geometry:
- ISO 7263-1 (A-flute geometry)
- ISO 7263-2 (B-flute geometry)
When a purchase order, customer drawing, or QA plan references “ISO 7263” without a year or part number, it is often necessary to clarify which successor part is intended.
Get help selecting an ISO 7263 test setup
If you are outfitting a paper test lab or upgrading fluting and flat-crush capability, contact our team to discuss the right instrument type, fixtures, and workflow for the exact ISO 7263 citation you need to support.