Should the case number go on the lid or the body?

On the body. Lids get separated and swapped when cases are stacked, repaired or re-foamed, and a number on the lid then identifies the wrong case. Put the primary code on the body where it can be read while the case is stacked, and repeat it on the lid only as a convenience.

Will a QR code label wear off?

A cheap paper label will. A printed code under a durable overlay, a laser mark, or a code on an engraved plate will last far longer. Choose the carrier to match the duty cycle - cases that are dragged, washed or exposed to sun need more than an office label, and you should check a sample after real use before committing to a whole fleet.

Do I need RFID or is a QR code enough?

A QR code is enough for most fleets: it is cheap, needs no reader infrastructure, and works on any phone. RFID earns its cost when you need to audit large numbers quickly without line of sight, and it needs a reader, a tag placement that survives impact, and care around metal and liquid.

How should the contents card be fixed inside the case?

Fix it to the inside of the lid where it is read first when the case opens, using a method that will not fall off into the contents - a recessed holder, a riveted or screwed plate, or a pouch designed for it. An adhesive card that eventually peels becomes litter inside the case.

How do I set up a case register?

Keep it simple enough that it gets maintained: one row per case with its code, contents, owner or crew, location, last audit date and next service action. Add spare-part records and repair history for the same code, and audit on a cycle you will actually keep.

Protective Case Labelling and Asset Tracking

One case is a container. Twenty cases are an asset pool, and an asset pool without identification becomes a cost: things go missing, ownership is unclear, maintenance is reactive, and nobody knows what is where. The good news is that a usable identification system is not complicated - it just has to be designed before the cases are marked, not after.

Three layers of identification

Most systems fail because they only do the first layer.

External identity. A code on the case that answers which case is this.
Internal identity. Cavity labels and a contents card that answer what belongs in here and what is missing.
Data identity. A register that answers where it is, who owns it, and when it was last checked.

Hard case fleet and the room to print and number each one — Mark the body, not the lid — lids get separated and swapped.

The three layers only pay off together. A code with no register is decoration, and a register with no durable code drifts out of sync the first time a label comes off.

Coding rules that survive

A code should be short enough to read aloud over a radio and structured enough to be sorted. A practical pattern combines a location or crew, a category, and a sequence number - for example a crew prefix, a two-digit type, and a three-digit serial.

Rule	Why	What goes wrong if ignored
Put the primary code on the body	Lids get separated and swapped	The code identifies the wrong case
Make it readable when stacked	Audits happen in stacks, not on a bench	Every audit means unstacking everything
Keep it short and speakable	Teams call codes out loud	Long codes get abbreviated and drift
Separate identity from content	Contents change over a case's life	Recoding breaks the repair history
Never reuse a retired code	History attaches to the code	Maintenance records end up on the wrong asset

Choosing the marking method

There is no best method, only a method matched to the duty cycle. The deciding questions are how long the fleet will serve, whether cases get washed or dragged, and whether the code needs to change.

Method	Durability	Changeability	Best for
Pressure-sensitive label	Lowest - edges lift, prints fade	Easiest - print and apply	Short projects, one-off shipments, temporary numbering
Screen printing	High - ink bonded to the surface	Fixed - needs a new screen	Permanent fleet codes and logos on a stable design
Thermal transfer onto a durable film	Medium to high - depends on the film	Easy to print variable data	Serialised codes where each case differs
Laser marking	High - marks the material itself	Fixed - cannot be undone	Harsh duty cycles, washing, abrasion
Engraved or etched plate	Highest - mechanical, replaceable	Replaceable plate	Harsh environments where the code must survive the case
Moulded-in or insert identification	Permanent	Fixed at tooling stage	Very large runs with a stable identity scheme

Printing a brand logo and printing an asset code are different jobs. Logo work is about appearance and placement; asset marking is about surviving the duty cycle and being readable in a stack. They can use different methods on the same case, and often should.

QR, barcode or RFID

Carrier	Reading	Infrastructure	Best for
QR code	Line of sight, any phone	None beyond a phone	Most fleets; links a code to a register record
Linear barcode	Line of sight, needs a scanner	Scanner required	Existing warehouse systems already built around barcodes
RFID	No line of sight, batch reading	Reader plus tags, plus care around metal and liquid	Large fleets audited frequently where speed pays for the setup

Start with the cheapest carrier that your audit frequency justifies. Most teams over-build here: a QR code that a phone can read, backed by a register, solves the actual problem for a fraction of the cost.

Make absence visible

The highest-value part of internal labelling is not naming things. It is making it obvious at a glance when something is missing.

One cavity per item, so an empty cavity is itself the signal.
Outline or shadow marking of the item in or around its cavity.
A contents card inside the lid, fixed so it cannot fall into the contents.
Cavity labels for consumables, where an item looks similar to its neighbour.

Tamper evidence

Where a case carries calibrated, sealed or high-value contents, a numbered tamper seal or a one-use tie gives you something a latch cannot: evidence that the case was opened. It turns a dispute about whether something was touched into a checkable fact, and it costs almost nothing.

Linking identity to maintenance

The same code that identifies the case should be the key for its service history. When a latch is replaced, a gasket renewed, or foam re-cut, record it against that code. Over a few years this turns into the data that tells you which models cost you the most to keep in service - which is exactly what you want to know at the next purchase.

Implementation sequence

Decide the coding scheme, and write it down before anything is marked.
Choose the marking method against the real duty cycle, and test one case first.
Mark the body, and repeat on the lid only as a convenience.
Build the register with one row per case: code, contents, owner, location, last audit, next action.
Add internal cavity identification and a fixed contents card.
Run one full audit, fix what the audit exposed, then set a cycle you will keep.
Record every repair and spare part against the case code from that point on.

The best system is the one that still gets maintained after six months. Prefer a simple scheme executed consistently over a sophisticated one that nobody updates.

Case Labelling and Asset Tracking: Codes, Carriers and Inventory Method