Packaging Testing Guide

A product can pass every test that applies to it and still arrive broken. Compression from stacked pallets on an ocean voyage, drops in parcel handling, vibration on road routes, and humidity swings between a South China warehouse and a North American one are packaging failures, not product failures, and no amount of product certification addresses them.

Packaging testing is the separate discipline that does. This guide covers the four physical stresses, the three frameworks your buyer is likely to name, what Amazon's programme actually requires, and the limit of what any test report can tell you.

The four stresses, and the standard for each

Whatever framework you end up working to, the underlying methods are the same small set. A test schedule is a way of specifying which of them to run, in what order, and how hard.

Stress	What it simulates	Common methods
Compression	Stacking in a container, on a pallet, in a warehouse	ASTM D642-25, ISO 12048:1994
Drop	Impact in parcel and manual handling	ASTM D5276-19(2023), ISO 2248:1985
Vibration	Road, rail and air transport	ASTM D999-08(2023)
Climate conditioning	Temperature and humidity before or during other tests	ASTM D4332-22

Conditioning is not an optional extra. Corrugated board loses compression strength as it takes up moisture, so a compression figure obtained on dry board in a temperate laboratory does not describe the same box after three weeks at sea. Where a schedule calls for conditioning, it is doing the most important part of the job.

The three frameworks, and how to tell which one you need

ASTM D4169, ISO 4180 and ISTA are not competing standards. They are three ways of specifying a schedule that a laboratory will then execute using the methods above. The choice is dictated by who is buying your goods.

Framework	What it is	Typically asked for by
ASTM D4169-23e1	A standard practice for performance testing of shipping units, built around named distribution cycles and three assurance levels	Large United States retailers and their suppliers
ISO 4180:2019	International rules for compiling performance test schedules for complete filled transport packages, excluding dangerous goods	European buyers and international programmes
ISTA series	A family of published test procedures run in ISTA certified laboratories, from screening through to member specific programmes	Parcel and direct to consumer shipments, and Amazon

If your buyer names a distribution cycle and an assurance level, they are working to ASTM D4169, which AQF covers in detail in its ASTM D4169 distribution cycles guide. If they name a test schedule without naming a cycle, they are usually working to ISO 4180. If they name a procedure number such as 3A, they are working to ISTA.

Getting this right before you commission anything is worth more than it sounds. A laboratory will run what you ask for, and a report against the wrong framework has to be repeated rather than converted.

ISTA, and which series you will be asked for

ISTA procedures are grouped in series, and the series tells you how closely the test tries to reproduce real distribution.

Series	Purpose
1	Non simulation integrity testing. Screening only, not predictive of shipping performance
2	Partial simulation, adding at least one element from the 3 series
3	General simulation, intended to represent actual distribution hazards
4	Enhanced simulation, built to a customised sequence
6	Member performance tests, written to a specific company's requirements

Two of these come up constantly. ISTA 3A is the general simulation procedure for individual packaged products shipped through a parcel system, published for units of 150 lb, given by ISTA as 70 kg, or less. And the 6 series currently carries the Amazon and Sam's Club procedures, the former FedEx procedures having been withdrawn.

Amazon: SIPP, SIOC and APASS

This is the area most often described incorrectly, including by suppliers offering to handle it for you.

What SIPP actually is

SIPP, Ships in Product Packaging, is the umbrella name for Amazon's packaging certification programme. It is not a replacement for Ships in Own Container. SIOC continues to exist inside it, as the second tier, alongside Frustration Free Packaging as the first.

The date frequently quoted, 5 February 2024, is when Amazon activated reduced fulfilment fees for certified packaging. The SIPP name was already in circulation before that in Amazon's vendor documentation.

Certification is carried out by laboratories recognised through Amazon's packaging support and supplier network, and the underlying test procedure is still the ISTA 6 series Amazon procedure.

That procedure is not a single test. It covers eight types, of which the first three address parcel delivery, three more address less than truckload freight, and the last two address televisions and monitors. Which type applies depends on how your goods are shipped and what they weigh, so the type has to be established before a laboratory is engaged.

One framing point worth holding onto. This is a commercial programme, not a legal requirement. Amazon asks for a report, offers fee advantages for certified packaging, and changes its terms through Seller Central, which is not publicly accessible. Treat current requirements as something to verify rather than something to assume, and be wary of any supplier who describes the programme as compulsory. AQF's Amazon FBA packaging requirements guide covers the wider marketplace picture, and shipping from China to Amazon FBA covers what travels with the goods.

Box compression, and why a formula from 1963 still runs the industry

Compression is where most transit damage originates, because it is cumulative and invisible. A box does not fail at the moment it is loaded. It fails after days under load, in humidity, at the bottom of a stack.

The industry still predicts compression strength using a relationship published by McKee, Gander and Wachuta in Paperboard Packaging in August 1963, linking the strength of a finished box to the properties of the board it is made from and the box dimensions. It is an estimate, not a substitute for testing, and it is why a supplier can quote a board specification and a competent buyer can form a view about whether the resulting box will stack before anything is made.

The practical consequences for a buyer are three. Board specification is a quality parameter, not a purchasing detail. Humidity changes the answer, so the destination and the route matter as much as the board. And a box that stacks in a laboratory can fail in a container if the stacking pattern differs from the assumption used in the test.

What a test report certifies, and what it does not

The report describes the sample, not the shipment

A laboratory certifies that the units it received passed the schedule it was asked to run. It makes no statement about the carton used four months later, on the third production run, from a supplier who may have changed.

The substitutions that undo a passed test are ordinary and rarely announced. A different board grade at the same nominal specification. A single wall construction where the tested sample was double wall. A different closure method. A dunnage insert simplified to save cost. Each of these can be invisible on a packing list and decisive under load.

This is the gap between a test result and a delivered shipment, and it is not closed by testing more. It is closed by verifying that the packaging leaving the factory is the packaging that was tested: board construction, dimensions, closure method and internal protection, checked against the retained sample on the actual production run.

Where there is reason to think the carton is being bought from a different vendor than the one that supplied the test sample, assessing that vendor directly answers the question faster than another test does. AQF's pre-shipment inspection covers finished goods at the factory, and AQF's lab testing services cover the analytical side.

How to brief a packaging test

1. Name the framework and the schedule, taken from what your buyer asked for rather than from what a laboratory offers.

2. Establish the shipping mode, since parcel, less than truckload and containerised freight are different schedules and, for the Amazon procedure, different types.

3. State the destination and the route, because conditioning requirements follow the climate the goods will actually see.

4. Fix the sample, meaning the exact board specification, construction, closure and internal protection, and retain a physical reference.

5. Decide how the production run will be checked against that reference, and when.

6. Confirm the laboratory's accreditation covers the specific standard, since accreditation is granted by scope rather than in general.

7. Agree who receives the report, and keep it with the retained sample, because the two are only useful together.

What AQF checks, and when to book it

Inspection	Point in production
Pre-production inspection	Before production starts, at development or pilot run stage
First article inspection	On a sample, before the run is released
During production inspection	Between 20 and 60 per cent of production
Pre-shipment inspection	Between 80 and 100 per cent of production, and best at 100
Container loading supervision	At loading
Defect sorting	A full visual check of every unit, after the fact

Factory audits are separate from inspection and cover supplier qualification, extended factory assessment and social accountability.

What the report contains

A standard report covers the sampling check against the agreed acceptance levels, quantity, specification, marking, labelling and packing, measurement, and any tests carried out on site. Findings, results and photographs are always included. A section verifying a client's own check points, and photographs of general factory conditions, are added on request.

Reports are typically delivered once the inspection is closed, with formats and turnaround options agreed in advance.

Frequently asked questions

What is packaging testing?

Packaging testing is the set of laboratory procedures used to evaluate how a filled transport package withstands the hazards of distribution: compression, drop, vibration, and temperature and humidity. It is distinct from product testing, which evaluates the item itself. A product can pass its own tests and still arrive damaged if the packaging fails.

What is the difference between ASTM D4169, ISO 4180 and ISTA?

They are three ways of specifying a test schedule rather than three competing methods. ASTM D4169 is a United States standard practice built around named distribution cycles and assurance levels. ISO 4180 sets international rules for compiling performance test schedules for complete filled transport packages, excluding dangerous goods. ISTA publishes a family of procedures run in certified laboratories. Which one applies is usually decided by the buyer of the goods.

What is a box compression test?

A compression test applies a controlled vertical load to a filled box to establish how much it withstands before failing, or to confirm it holds a defined load. The methods commonly used are ASTM D642 and ISO 12048. The result is used to judge whether the box will stack safely in a container, on a pallet and in a warehouse.

What is a drop test for packaging?

A drop test releases a packaged product from a defined height onto a rigid surface to establish how it survives the short impacts typical of parcel and manual handling. The methods commonly used are ASTM D5276 and ISO 2248. The drop heights and sequence are set by the schedule being run rather than chosen freely.

Why does humidity matter in packaging testing?

Corrugated board takes up moisture and loses compression strength as it does. A box tested on dry board in a temperate laboratory does not behave the same way after a long sea voyage in a humid container. This is why schedules include climate conditioning, commonly to ASTM D4332, before or during other tests rather than as an optional addition.

What is ISTA 3A?

ISTA 3A is the general simulation performance procedure for individual packaged products shipped through a parcel delivery system, published for units of 150 lb, given by ISTA as 70 kg, or less. It is among the most frequently requested procedures for direct to consumer shipments.

What is the difference between SIPP and SIOC?

SIPP, Ships in Product Packaging, is the umbrella name for Amazon's packaging certification programme. SIOC, Ships in Own Container, has not been withdrawn: it continues as a tier within SIPP, alongside Frustration Free Packaging. Certification is carried out by laboratories recognised through Amazon's packaging support and supplier network.

Is Amazon packaging certification compulsory?

No. It is a commercial programme rather than a legal requirement, and Amazon offers fulfilment fee advantages for certified packaging. Requirements are communicated through Seller Central, which is not publicly accessible, so the current position should be verified rather than assumed.

Can packaging testing be done in Asia?

Yes. Laboratories accredited to ISO/IEC 17025 and holding the relevant certifications operate across the region. The point to confirm is that the accreditation covers the specific standard you need, since accreditation is granted by scope rather than in general, and that the laboratory holds any certification the buyer's programme requires.

Talk to AQF about your packaging

Tell us what your buyer has asked for, where the goods are made and where they are going, and we can set out what should be tested and what should be checked at the factory.

Contact AQF