Box Compression – ASTM D642

What Is Box Compression — ASTM D642?

The box compression test applies increasing vertical load to a closed box between two platens and measures the collapse force. While ECT gives a material property, BCT measures the finished box's performance; design, cutting, gluing and closure method are all directly reflected in this value.

Purpose of Box Compression — ASTM D642

The purpose is to verify the box withstands its designed stack height and storage duration without crushing.

Which Products Is Box Compression — ASTM D642 Applied To?

Corrugated shipping boxes
Filled and closed packages
Agricultural and food crates
E-commerce shipping boxes
Export packaging

In Which Sectors Is Box Compression — ASTM D642 Used?

PackagingLogisticsRetailFoodAgriculture

Standards Related to Box Compression — ASTM D642

ASTM D642ambalajlarda basma (kompresyon) testi test

Box Compression — ASTM D642 Conditions

Conditioning: In the standard atmosphere; additionally at high humidity if required
Platen: Fixed or articulated; must be stated in the specification
Closure: The box must be closed with tape or staples as in real production

Equipment for Box Compression — ASTM D642

Compression tester
Load cell and deformation gauge
Conditioning room

Sample Requirements for Box Compression — ASTM D642

Filled and closed boxes; at least three specimens
Contents must be the real product or an equivalent filler
Box code, flute type and dimensions must be provided
The test is not performed before conditioning is complete

Duration of Box Compression — ASTM D642

The test is short; duration is set by conditioning. If a long-term static stacking assessment is required, the test spans days or weeks.

Box Compression — ASTM D642 Procedure

1Boxes are conditioned.
2They are filled with real contents or an equivalent filler and closed as in production.
3It is centred between the machine's platens.
4Vertical load is applied at constant speed.
5Maximum force and deformation are recorded.
6The mode and starting point of collapse are recorded.

Box Compression — ASTM D642 Acceptance Criteria

The acceptance criterion is that the calculated real stacking load, together with a safety margin, stays below the measured BCT value. The safety margin is set according to storage duration, humidity, transport mode and stack alignment.

Evaluation of Results

Where collapse starts is design feedback: side-wall buckling points to material choice, corner crushing to cutting and folding precision. The short-term test value is also above the long-term static load strength; the stacking calculation must account for this.

Box Compression — ASTM D642 Report

Box identification, dimensions and flute type
Contents and filled weight, closure method
Conditioning conditions and platen condition
Maximum force, deformation and collapse mode
Photographs

Accreditation

EUROLAB holds internationally recognised accreditation obtained from accreditation bodies party to the IAF and ILAC multilateral recognition arrangements, under ISO/IEC 17025 for laboratory testing, ISO/IEC 17020 for inspection and surveillance, and ISO/IEC 17021-1 and ISO/IEC 17065 for system and product certification. This chain ensures the reports and certificates issued are accepted worldwide.

Whether this test can be offered within accredited scope depends on your product and the standard applied; since accreditation is method-based, the scope is confirmed in writing at the quotation stage.

Scope and authorisations

Related Regulations

EU 94/62/EC Packaging and Packaging Waste Directive
Regulation on the Control of Packaging Waste
EU 1935/2004 (materials in contact with food — where applicable)

Ambalaj Testleri — What Does This Testing Field Cover?

The section below describes the field that the Box Compression test belongs to; the conditions and acceptance criteria of this particular test are given in the sections above. The scope specific to your product is confirmed in writing at the quotation stage.

Packaging testing examines two different functions separately: does the packaging protect the product during transport, and does the packaging material transfer harmful substances into its contents? These two questions require different laboratory infrastructure and must not be confused.

On the protection side, distribution simulation is carried out: drop, vibration, compression, stacking and, where needed, low pressure tests are applied in sequences representing the real shipping chain. These tests are meaningful as a SEQUENCE rather than individually; in real life too, packaging is exposed to successive loads and each load builds on the damage left by the previous one. Specifications such as ISTA and ASTM D4169 define these sequences by shipment type.

The shipment type determines the sequence itself. The exposure of a palletised load differs from that of a parcel shipped individually: the latter sees far more handling, more drops and impacts in a wider variety of orientations. The growth of e-commerce has brought this second scenario to the fore and turned parcel shipping simulation into a specification group of its own.

On the food contact side, MIGRATION is what counts: the amount of substance passing from the packaging material into the food is compared against overall and specific migration limits. For plastic packaging the list of permitted substances and the limits are defined in separate legislation; the declaration of conformity (DoC) rests on this assessment and is a document that every link in the supply chain must carry.

In a migration test the choice of SIMULANT is critical. Because testing with real food is not practical, liquids representing food are used: different simulants for aqueous foods, for fatty foods and for acidic foods. Choosing the wrong simulant invalidates the result; the choice depends on which food type the packaging will contact and at what temperature.

Barrier properties are a third axis. Oxygen and water vapour permeability directly determine the shelf life of the product; in pharmaceutical and food packaging these values are a design input. Barrier performance is sensitive to temperature and relative humidity, so the measurement conditions are part of the report.

Sterile medical device packaging is the most tightly regulated sub-body of this family. Here the packaging is a barrier maintaining sterility; seal strength, leak testing, distribution simulation and shelf-life studies run together as a validation package.

The packaging legislation side is becoming rapidly more demanding. Recyclability, recovered content ratio, packaging reduction and reuse targets must now be measurable and declarable; this turns packaging design from a material selection exercise into a conformity exercise.

Method groups in this field

Distribution simulation
Drop, random and fixed frequency vibration, compression, stacking, low pressure; as ISTA and ASTM D4169 sequences.
Mechanical strength
Edge crush (ECT) in corrugated board, bursting strength, box compression strength, tape peel adhesion.
Barrier measurements
Oxygen transmission rate (OTR), water vapour transmission rate (WVTR), permeability in film and sheet materials.
Migration
Overall and specific migration tests; simulant and temperature conditions are chosen according to the use scenario.
Seal and integrity
Seal peel strength, leak detection by dye penetration, bubble test, headspace analysis.
Shelf life
Real-time and accelerated ageing; part of the validation package in sterile packaging.

Commonly confused in this field

A single drop test is not a distribution simulation; the tests are applied as the sequence defined in the specification.
A migration test carried out with the wrong simulant or the wrong contact temperature is invalid.
Accelerated ageing does not replace real-time ageing; a shelf life claim is supported by real-time data.
Barrier values are valid together with the measurement temperature and relative humidity; an OTR/WVTR value given without conditions cannot be compared.
A packaging change (film supplier, seal parameter, box design) may require the validation to be repeated.
A food contact declaration of conformity is not a test report; it is a document that rests on reports but summarises a broader assessment.

Which decisions these results support

Reducing shipping damage and verifying the packaging design
Declaration of conformity for food contact packaging
Supporting the shelf-life claim
Validation of sterile device packaging
Recyclability and content declarations under packaging legislation

Related Tests

Frequently Asked Questions About Box Compression — ASTM D642

Is our BCT value sufficient for stacking?

The measured value is not used directly. Strength drops as storage time and humidity increase; boxes in a stack are also not always perfectly aligned. A significant safety margin is therefore applied in the calculation.

Is retesting needed for a different-size box made of the same material?

Yes. Box perimeter and height directly change strength. Even if ECT stays the same, a different-sized box has a different BCT value.