Short answer
Handling marks are printed or stuck symbols that tell handlers how to orient and treat a package. ISO 780 specifies graphical symbols for distribution packages, but real cartons carry faded, partial, home-made and non-standard marks. Shippers and 3PLs hold images of them. Recognizing a mark is not the same as knowing how a robot should then handle the package.
What the marks are and why they matter
Human handlers read a carton's face quickly: an arrow pair that says which way is up, a glass symbol that says be careful, a raindrop umbrella that says keep dry. Handling marks are one of the few instructions the package itself carries. A robot that stacks, tilts or flips parcels without reading them can invert liquids, crush fragile contents or load heavy cartons on top of light ones.
ISO 780:2015 specifies graphical symbols conventionally used for marking distribution packages to convey handling instructions, applies to packages of any kind of goods, excludes instructions specific to dangerous goods, and states that symbols should be used only when necessary (ISO). Its record shows it replaced the 1997 edition. Use the standard itself, not this page, for the symbol definitions and artwork, and confirm there which symbols exist.
The "only when necessary" language matters to a buyer: many cartons carry no marks at all, and absence is not a negative label. For hazard labeling, see hazmat and GHS labels, which this page does not cover. The cluster overview is the product and object data hub.
The gap between the standard and the carton
A dataset built from the standard's clean artwork would teach a detector the idealized versions. Real packages differ:
- Print quality. Faded flexographic ink, smeared stamps, low-contrast marks on brown board.
- Hand-applied marks. Marker-drawn arrows, stickers from a roll, hand-written "FRAGILE".
- Non-standard variants. Company-specific icons, translated text, pictograms not in the standard.
- Partial marks. A symbol cut by a flap, covered by tape or label, or wrapped around an edge.
- Placement variance. On one panel, several panels, the top only, or an overpack that hides the inner marks.
- Conflicting information. Two orientation arrows that disagree after repacking.
Whether a candidate image set captures these is the first diligence question. A set made only of well-printed standard marks will look good in evaluation and fail on a real dock.
What to ask a dataset to contain
- Images of whole cartons and close-ups of marks, with the mark's location on the package.
- The mark type, as a label from a stated class list. Ask whether the list follows the standard or the supplier's own names.
- Mark state: legible, degraded, partial, covered, contradicted.
- Package orientation relative to the camera, because a mark seen sideways is a different recognition problem.
- Package type: corrugated carton, tote, bag, drum, pallet wrap.
- Image context: conveyor, dock, trailer, pallet face.
Resolution is a real constraint here, since a symbol may be a few centimeters across on a box seen from a distance. See small object resolution requirements and the adjacent labels, barcodes and text on packages page for how text and codes are handled.
Illustrative annotation schema
Illustrative only; synthetic values and placeholder class names. Check actual symbol names against the standard.
| Field | Illustrative value | Note |
|---|---|---|
mark_class | orientation_arrows | Class list defined in your spec |
class_source | iso_780_aligned / supplier_custom | Distinguish standard from home-made |
mark_state | degraded | Legible, degraded, partial, covered |
panel | top | Where on the package |
applied_by | printed / sticker / hand_drawn | Production method |
package_type | carton | Context |
site_id | site_027 | Domain splits |
Where the images come from
Shippers and manufacturers mark their own outbound cartons and hold outbound packing photos, inspection images and damage claims. They know why a mark was applied.
Third-party logistics providers and carriers see the entire population of marked and unmarked packages, including damaged and repacked ones. Their images come from induction, sortation and exception stations. See 3PL providers as data suppliers.
Packaging suppliers hold artwork and test prints, which are clean and carry the standard's marks as ordered, but not wear.
Existing assets are rarely labeled for marks. Expect to commission labeling of mark class, location and state, and to scope how many classes and states you need before asking a supplier to quote. SourceX can discuss whether this is feasible; labeling scope is case by case.
Permissions and provenance
Package images can show addresses, names, order numbers and phone numbers on labels. Carrier and shipper contracts may also restrict use of operational images. Ask what review the supplier has done, whether images can be cropped to marks without losing needed context, and who can authorize licensing. Redaction of an address does not settle the permission question. This is not legal advice.
What mark recognition cannot support
A detector that finds "this way up" tells a robot what the package says. It does not tell the robot what to do about it. Deciding to rotate, pivot, avoid a stack or reject a package belongs to planning and control, and manipulation of a tilting carton needs robot or teleoperation data with contact and force information. Handling mark images do not provide that. Marks also do not prove the contents are fragile or that the package is correctly marked; they report what someone applied.
Other limits:
- No mark does not mean no hazard. Absence of a symbol is not a safe-to-handle label.
- Standards change. Editions are replaced, and carriers add their own conventions.
- Language. Printed words accompany symbols in many markets, and may need text recognition.
- Evaluation. Hold out shippers and sites, since each tends to reuse the same stamp.
Related pages: workplace signage and safety labels for fixed signs rather than package marks, packaging variants and SKU appearance for how outer packs change, and shipping package damage for outcome data that can show whether marks were followed.
Questions to ask suppliers
- Which mark types appear, and are they from the standard, custom or hand-drawn?
- Are degraded, partial and covered marks present, or only clean ones?
- How were marks labeled, and what class list was used?
- What viewing distances and angles do the images cover?
- Do images show addresses, names, order numbers or people?
- Are repacked, overpacked and contradictory cases included?
- What restrictions do carrier, shipper or customer contracts place on using the images?
- Can images be segmented by shipper, so a shipper can be held out?
- Is damage or handling outcome data available alongside the marks?
Discuss your requirements
If you need images of packages with handling marks, describe the mark classes, package types and permitted uses to SourceX. SourceX looks for US businesses that hold suitable material, checks the data and the supplier's licensing permissions, and coordinates the license and delivery. A request does not guarantee a match; SourceX follows up about potential sources. The humanoid training data guide maps the other routes, and the catalog entry for supply chain and logistics data describes a related data type.
Discuss your humanoid training-data requirements with SourceX
Sources
- ISO 780:2015 Packaging - Distribution packaging - Graphical symbols for handling and storage of packages — scope of the standard for handling symbols on distribution packages.