ISO 12048 Compression and Stacking Tests for Packaging Transport Packages

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Mechanical testing in the packaging industry determines the packaging's resistance to compression, impact, and tension, directly ensuring the safety of contents during storage and transportation. UnitedTest can cover comprehensive mechanical testing for packaging, complying with ISO, ASTM Standards, and provides customized testing solutions for compression, drop, tear, and more.

Mechanical testing in the transportation industry concerns the load-bearing and fatigue resistance performance of core components such as vehicles, tracks, and containers, directly ensuring transport safety and equipment durability. UnitedTest can cover mechanical testing for all types of transportation materials, complying with national and international standards, and provides customized testing solutions including tensile, fatigue, and impact tests.

Metallurgical testing examines the properties of metallic materials to determine if a particular metal is appropriate for its intended use.

Testing of polymer materials covers mechanical, thermal, and chemical properties, verifying strength, heat resistance, composition, and ensuring product quality and compliance.

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Testing of rubber and elastomers is used to assess the various properties and performance of materials under different conditions. This is crucial for ensuring the safety, functionality, and quality of rubber and elastomer products used in industries such as automotive, construction, consumer goods, and aerospace.

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Tensile test evaluates material resistance to stretching, measuring strength/elongation critical for quality control. UnitedTest offers universal tensile testers (10-600KN) compliant with ASTM/ISO standards, providing tailored solutions for metals, polymers, medical & industrial materials.

Compression test assesses material resistance to compressive loads, measuring strength/deformation critical for quality validation. UnitedTest offers compression testing machines compliant with ASTM/ISO standards, providing tailored solutions for concrete, plastics, metals and industrial components.

Flexural & Bend tests evaluate material resistance to bending forces, measuring strength, stiffness and ductility for quality assurance. UnitedTest provides flexural testing machines (3-point/4-point bend) compliant with ASTM/ISO standards, offering tailored solutions for composites, plastics, metals and construction materials.

Torsion Test evaluates material resistance to rotational forces, measuring torsional strength/ductility critical for fasteners, insulators, shafts. UnitedTest offers torsion testers compliant with ASTM A938/ISO 16047, providing tailored solutions for automotive, aerospace, fastener industries.

Fatigue Test assesses material durability under cyclic loading, critical for predicting service life of industrial components. UnitedTest offers fatigue testing systems (axial/bending/torsion) compliant with ASTM E466/ISO 12106, providing tailored solutions for automotive, aerospace and manufacturing sectors.

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Tear & Shear Test evaluates material resistance to tearing and shearing forces, measuring critical strength parameters for quality control. Tear tests (Elmendorf/trouser/trapezoidal) assess resistance to crack propagation in films/fabrics, while shear tests measure resistance to parallel forces in joints/bolts. UnitedTest provides universal testing machines (10KN-600KN) with specialized fixtures for both tests, compliant with ASTM D624/D3164 and ISO standards, serving automotive, packaging and construction industries.

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Biaxial/triaxial tests evaluate material performance under multi-axis loads, critical for biomaterials, metals and composites. UnitedTest provides compliant testing machines (ASTM/ISO) for planar biaxial, static/fatigue triaxial tests, with tailored solutions for industrial & biomedical needs.

Friction and wear tests assess material resistance to friction, abrasion and wear, critical for industrial material performance validation. UnitedTest offers tribometers compliant with ASTM G99/ISO standards, covering pin-on-disk, four-ball tests, and tailored friction & wear testing solutions for diverse industries.

Pressure test evaluates material/component resistance to static/dynamic pressure, critical for sealing, strength and safety validation. UnitedTest offers pressure testing machines compliant with ASTM/ISO standards, covering burst, hold-pressure tests, and tailored solutions for industrial, automotive & medical sectors.

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Non-destructive Test (NDT) evaluates material/component integrity without damage, critical for safety & quality across industries. UnitedTest offers ultrasonic/X-ray/magnetic particle NDT equipment compliant with ASTM/ISO standards, plus tailored NDT solutions for aerospace, automotive & manufacturing sectors.

ISO 12048 — Packaging – Complete, Filled Transport Packages – Compression and Stacking Tests Using a Compression Tester

ISO 12048 specifies methods for testing the resistance to compression of complete, filled transport packages, and for carrying out a stacking test on such packages — using a compression tester (platen-type machine) rather than dead weights.

It specifies three static-load methods to apply a sustained vertical load and then inspect the result—looking at deformation, creep, collapse, or failure, and at how well the package still protects its contents.

Two distinct test modes are covered by the same apparatus:

Mode	Purpose
7.1 Compression Test	Load is applied (via closing platens) until failure / collapse occurs or until a predetermined load or displacement is reached — to assess compressive strength / BCT-type behavior.
7.2 Stacking Test	A predetermined load is applied and held for a predetermined time (or until collapse) — simulating sustained stack weight, but delivered mechanicallyby the tester rather than by static masses.

ISO 12048 Compression and Stacking Tests for Packaging Transport Packages

Test Principle

The core principle is to place a complete filled transport package between the upper and lower platens of a motor-driven compression tester. Two distinct test modes are implemented based on test purposes:

Compression test: The platens move at a regulated constant speed to apply continuous compressive load on the package until the package collapses, fails, or the preset load/displacement value is reached.

Stacking test: A fixed predetermined static load is applied steadily for a set duration. The test stops early if the package collapses during loading.

Throughout the process, load force and platen displacement are recorded to analyze package deformation, structural damage and load-bearing capacity under compression or long-term stacking pressure.

Specific test methods ISO 12048:

ISO 12048 defines two integrated test methods using the same compression tester apparatus:

Method 1: Compression Test

This method measures the ultimate compressive strength of a package. Load is applied continuously at a standard speed until the package suffers structural failure, or the preset load or displacement target is achieved. It identifies the maximum compression force the package can withstand instantly. When testing edge or corner compression resistance, platens must be fixed horizontally without tilting.

Method 2: Stacking Test

This method simulates long-term stacking conditions in warehouses and transport. A predefined constant load is maintained for a specified time (mimicking stacked package weight). The test ends once the holding time is completed or the package collapses in advance. This method is also referenced as an alternative stacking test solution against ISO 2234 (static dead-load stacking test).

Test Specimens

Specimen definition: Test items are complete, fully filled transport packages for logistics and distribution. Unit loads are also applicable.

Contents regulation: Packages are required to be filled with actual intended goods. Simulated or dummy contents are permitted only if their dimensions and physical properties are nearly identical to real contents. The package sealing and closing method must be exactly the same as that used for commercial distribution.

Replicate quantity: It is recommended to conduct tests on five replicate packages to improve the reliability of test data.

Pre-treatment: All specimens must undergo standardized conditioning before formal testing to eliminate the impact of temperature and humidity on packaging materials.

ISO 2234 Transport Package Stacking Test - Static Load

ISO 12048 Compression and Stacking Tests for Packaging Transport Packages Required Testing Equipment :

Compression test machine	Recommend UnitedTest Carton box compression testing machine. The relative moving speed of platens is controlled at 10 mm/min ± 3 mm/min. For rigid packages like metal drums and wooden crates, a lower speed can be adopted to avoid abnormal load peaks. Load stability: For long-duration stacking tests, load fluctuation shall not exceed ±4% of the preset value, and platen displacement is only allowed to maintain stable load output.
Loading Compression Platen	For platens with an area less than 1 m², surface flatness tolerance is 1 part in 1000; for areas larger than 1 m², the height difference between the highest and lowest points shall not exceed 1 mm. When the tester outputs 75% of its maximum rated load, the platen deformation at any point shall not exceed 1 mm. Platen posture: One platen must stay horizontal at all times (tolerance: 2 parts per 1000). The other platen can be either fully fixed horizontally or equipped with a universal joint to tilt freely in all directions.
Dimension measuring tool	Used to measure package size and deformation, with an accuracy of ±1 mm.
Auxiliary fixtures	Custom profiled inserts can be added between platens and packages to simulate special loading scenarios such as open-deck pallets and partial contact loading.

Key Test Parameters

Loading speed: Standard speed is 10 mm/min ± 3 mm/min; reduced speed is allowed for metal and wooden heavy-duty packages.

Datum point for deformation measurement: The initial reading (datum point) is determined by the average compression load, as shown in the table below:

Average compression load (N)	Datum point (N)
101–200	10
201–1000	25
1001–2000	100
2001–10000	250
10001–20000	1000
20001–100000 and above	2500 and above

Load stability: During stacking tests, load fluctuation must be within ±4% of the preset load.

Atmospheric environment: The test temperature and relative humidity shall be consistent with the conditioning environment as much as possible, especially for moisture-sensitive packaging materials.

Loading duration: For stacking tests, the duration is preset according to actual application scenarios; the test terminates immediately if package collapse occurs.

Test Stipulations & Standard Operating Procedures of ISO 12048 Compression and Stacking Test:

1, Preparations

Fill and seal specimens in the normal distribution state, and record the gross mass, contents mass and external dimensions of each package.

Condition all specimens strictly in accordance with ISO 2233.

Calibrate the compression tester, recording device and measuring tools to meet precision requirements.

2, Compression Test Procedures

Place the conditioned specimen centrally on the lower platen of the tester with the preset test posture. Install auxiliary fixtures if special loading conditions need to be simulated.

Start the tester, let platens move at the standard speed 10 ± 3 mm/min to apply load, and record data from the specified datum point.

Stop the test when the package collapses or the preset load/displacement is reached. Record the failure load value.

If needed, maintain the final load for a set time and record the duration until collapse.

Retract the platens, inspect package deformation, cracks and contents damage, and measure post-failure dimensions.

3, Stacking Test Procedures

Follow the specimen placement and preloading steps of the compression test.

Apply the preset static load and keep it stable for the required duration. Record the time if the package collapses in advance.

Remove the load after the test ends, inspect the overall condition of the package and internal goods, and record all abnormal phenomena.

4, Test Report

The official test report must include: standard number, test type (compression or stacking), number of replicate specimens, package specifications (size, material, structure, closure), contents details (note if simulated contents are used), gross mass and contents mass, conditioning and test environmental parameters, package test posture, equipment type (mechanical/hydraulic tester, platen type), fixture information, loading speed, load value, holding time, deformation and failure records, test deviations and tester signature.

Industry Applications

Packaging manufacturing: Performance testing for corrugated cartons, plastic containers, wooden crates, metal drums and composite transport packages.

FMCG / Food & Beverage (cases, trays, multipacks)

E-commerce & Retail (RSC boxes, shelf-ready packaging)

Electronics & Appliances (boxed units with cushioning)

Pharma & Healthcare (secondary/tertiary packaging validation)

Industrial / Automotive (components in crates, drums, totes)

Logistics / 3PL / Carrier qualification (cube utilization, warehouse stacking limits, pallet pattern sign-off)

Commodity production industries: Food & beverage, electronics, home appliances, pharmaceuticals, daily chemicals and industrial parts industries, to verify whether packaging can protect products during compression and stacking.

Logistics, warehousing and freight: Evaluate packaging adaptability for long-term stacked storage in warehouses and compressive loads during container, land and sea transportation.

Third-party testing and certification institutions: Serve as a universal international standard for packaging quality inspection, product certification and cross-border commodity compliance testing.

Related Test Standard:

ISO 2234	Packaging — Complete, filled transport packages and unit loads — Stacking tests using a static load
ASTM D642	Standard Test Method for Determining Compressive Resistance of Shipping Containers, Components, and Unit Loads
GB/T 4857.3	Packaging. Basic tests for transport packages. Part 3: Stacking test methods using a static load
TAPPI T804	Compression Test of Fiberboard Shipping Containers
ISO 2233	Regulates the uniform conditioning conditions (temperature, humidity, time) for transport packages and unit loads, a mandatory pre-test procedure for ISO 2234 tests.
ASTM D4169	Performance testing practice for shipping containers: ASTM D642 is the referenced test method for all compression/stacking related test cycles in ASTM D4169.

Packing carton box Compression Testing Machine is essential for evaluating the compressive strength of cartons and packaging materials. suitable for pressure resistance, deformation and stacking test of corrugated boxes, honeycomb plate boxes and other packaging parts.

Packing carton box Compression Testing Machine is the most direct test instrument for detecting the compressive strength of cartons or other packaging containers, and is used to determine the load-bearing capacity and superposition height of cartons.

Q1: What is ISO 12048:1994?

A: It is an international standard specifying compression tests and stacking tests for complete filled transport packages by using a professional compression tester. It replaces the old ISO 2872:1985 and ISO 2874:1974.

Q2: What are the main purposes of this test?

A: To measure the ultimate compression strength of packages and evaluate their performance under long-term static stacking load. It also verifies if packaging can protect contents against compression risks during storage, handling and transportation.

Q3: Why is ISO 12048 test important for packaging materials?

A: It accurately tests the maximum load-bearing capacity, anti-deformation and anti-creep properties of packaging materials such as corrugated board, plastic, wood and metal. Test data guides material selection and structural design, reduces product damage in logistics, prevents stack collapse hazards, and meets international quality and trade requirements.

Q4, Are there safety considerations?

A: Yes. The standard warns that stable loading depends on friction and the package’s resistance to deformation. Provision must be made so that if collapse occurs, the load is restrained and personnel are not endangered. Always use appropriate guarding and follow laboratory safety protocols.

Q5: What is the difference between ISO 12048 and ISO 2234?

Feature	ISO 12048	ISO 2234
Loading method	Motor‑driven compression tester (controlled speed & load‑hold)	Static dead‑weight (stack of boxes or platform + weights)
Data output	Load, displacement, time‑to‑failure, load‑hold curves	Visual inspection, deflection (±1 mm)
Equipment cost	Higher (requires compression tester)	Lower (needs only flat floor, weights, platform)
Primary use	Quantitative strength & endurance data	Simple, realistic stacking simulation
Standard relationship	Note 3 in ISO 12048 refers to ISO 2234 for static stacking.	ISO 2234 is the static counterpart.

Q6: Can we use simulated contents instead of real products?

A: Yes. Simulated/dummy contents are allowed as long as their dimensions and physical properties match the real contents. The package closure method must remain unchanged.

Q7: How many sample packages are recommended for testing?

A: The standard suggests using five replicate packages to ensure reliable and representative test results.

Q8: What is the standard moving speed of the tester platens?

A: The relative speed is 10 mm/min ± 3 mm/min. Lower speeds are permitted for metal drums and wooden crates to avoid abnormal load peaks.

Q9: When will the compression test stop?

A: The test stops when the package collapses/fails, or the preset load or displacement value is achieved, whichever comes first.

Q10: When will the stacking test stop?

A: It stops when the preset holding time ends, or the package collapses during loading.

Q11: Can the test simulate special loading conditions like open-deck pallets?

A: Yes. Custom profiled inserts can be placed between platens and the package to simulate partial contact or special stacking scenarios.

Q12: When should we choose ISO 12048 instead of ISO 2234?

A: Choose ISO 12048 if you have a professional compression tester, need precise load control, accurate data recording, or require formal laboratory testing and certification.

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