Who puts your part number on the carton?
On a sheet metal fabrication order, the drawing package gets signed long before anyone asks who applies the label. Three models are workable. The fabricator bags, labels and cartons under your brand. The parts ship bulk and get packed closer to the market. Or the work splits: they bag and label, you print and own the carton. Each model puts the label in different hands, and that is the actual decision.
Part price sits next to packing and kitting labor, freight and cube, and the labor at whichever end does the packing. Packing in-market does not delete that labor; it moves it to a different wage rate and a different set of mistakes.
White-label packing moves the physical work, not the duty. Your name on the carton is still yours: the label content, the artwork revision, the import markings, the compliance statements. A supplier can print what you send; it cannot take responsibility for whether what you sent was right.
The reversal is what a credit note cannot touch, because a container of mislabeled cartons has already been counted as finished. Fixing it means unpacking, reprinting, re-bagging, re-sealing and recounting, at destination, on labor nobody quoted.
So before you read on: does your packing spec exist as a document, or only as an email thread?
Fabricator-packed, market-packed, or split? A packing scope table for sheet metal fabrication
Three packing scopes: fabricator-packed, market-packed, and a split of the two.
Four situations cover most white-label sheet metal orders, and each pushes the packing scope a different way. What separates them is rarely the part. It is who owns the label, who controls the carton artwork, whether a kit has to survive transit as a set, and who eats the cost of a wrong print.
| Buyer situation | Label ownership | Carton artwork control | Set integrity through transit | Weight and cube | Who absorbs a wrong label | Recommended scope |
|---|---|---|---|---|---|---|
| Retail-bound consumer hardware | Buyer | Buyer, on a marketing cycle | Part-level only; shelf carton is separate | Bagged parts add cube versus nested | Buyer, since you approve the printed carton | Split: fabricator bags and labels the part, branded carton packed in-market |
| Industrial equipment with service parts | Fabricator for kit count, buyer for label content | Buyer | Must stay intact; a missing spares bag stops commissioning | Kit adds cube but avoids a second shipment | Fabricator for kit count, buyer for content | Pack and label at the fabricator |
| Contract manufacturer kitting to a work order | Split: fabricator part label, CM traveler label | CM | Set defined by the work order, not the part number | Kit cube follows the BOM | Split; agree it in the PO before the first kit | Fabricator packs to your kit list, CM applies its traveler |
| Distributor with many small SKUs | Buyer | Buyer, and still moving | Low; SKUs ship individually | Small parcels, high pick count | Buyer | Not yet: pack in-market until the artwork settles |
Label at the factory or pack closer to home? Two routes and the seam between them
Route one keeps the job in one building. Parts come off the laser or the brake, get degreased, bagged, labeled, cartoned and sealed before the container loads. One purchase order covers fabrication and packing, and nothing is touched again between the last inspection and the pallet. What the buyer gives up is timing: artwork changes now queue behind a supplier’s production schedule, and label stock sits in a warehouse the buyer does not control.
Route two ships bulk and packs in market. Parts arrive nested and unbranded, then take their label, bag and carton close to the customer. Artwork approval, label stock and final presentation stay within reach, which matters when the packaging is the thing that keeps changing. The price is a second handling line, storage, and a labor rate the buyer controls only as well as their own operation.
Where the seam sits
Most real orders land between the two. The fabricator bags and labels the metal parts; the buyer prints and packs the branded carton domestically. That split works for teams whose carton artwork moves more often than the part does, because the metal half releases on a long lead while the print half stays local and cheap to revise.
Where white-label packing plans break, and the check that catches each one
Most of these failures are approved by email reply, months before anyone folds a carton.
Screen proof is the first. A PDF shows the artwork is laid out correctly. It does not show whether the part number reads at arm’s length across a warehouse floor, whether the barcode scans off a matte label on kraft stock, or how far the brand color shifts when it prints on brown board instead of white paper. Approve from one sealed physical carton, packed with real parts at real weight. That carton becomes the reference the pack line works from.
Then there is the phrase “export-ready packing.” It means the parts survive a container: moisture barrier, edge protection, pallet build, carton weights. Retail-ready means the carton sells and scans on a shelf. A supplier can be strong at the first and have never built the second, so ask which one the quote covers rather than reading the adjective as both.
Label specs fail quietly when they live in an email thread. If the label format, the part number scheme and the barcode symbology are not written into the purchase order, the shop reuses whatever it ran last time.
Revision drift costs the most to undo. Pair every part revision with a carton artwork revision, in writing, and name which one wins if the two disagree at pack-out. Without that, a dimensional fix made in month four ships inside a carton that still describes the old part.
What to ask a sheet metal fabrication supplier before you hand over your label
The questions worth settling before the purchase order, not after shipment two.
A supplier can agree to “pack to your spec” and still hand the label job to a subcontractor nobody named. The questions below are built to surface that before the PO, not after shipment two.
| Ask | Expected evidence | Red flag | Responsible party |
|---|---|---|---|
| Who prints the label, and who applies it? | A named owner for each step, plus a sealed carton from an earlier white-label run | “We handle packing” with no name attached | Sourcing confirms; artwork owner signs |
| Is kitting in-house or subcontracted? | Kitting labor broken out on the quote, and the address where kits are assembled | Kitting quoted as a lump sum with no labor line | Program manager |
| Do you accept consigned components? | A written receiving and shortage rule, and a named stockholder | A verbal yes with no counting rule | Sourcing and quality |
| What labor appears on the quote? | Part price, packing labor and kitting labor as separate lines | One blended unit price | Sourcing |
| How does a packing-spec revision reach the line? | A versioned spec, a named signer and a photo of the first sealed carton for shipment two | Artwork approved by email reply, no version number | Artwork owner and quality |
A public scope list is a starting point, not proof. wenxinda’s sheet metal fabrication page lists export-ready packing as a scope item, which tells a buyer the topic exists, not who prints the label or who holds the stock. A supplier who declines kitting is not automatically out; the useful answer is the one that names the owner and produces the artifact. If the packing spec changes after the PO, the versioned document with a signature beats the email thread every time.
Pick the packing model, then write it into the PO
The answer to who puts your part number on the carton comes down to one question: what does the person receiving the box read? If that label is all that stands between your part and a retail shelf, the buyer keeps the artwork, the proof and the label stock, whoever physically applies it. A fabricator can print and stick it, but approval runs through you, because a wrong barcode on a shelf costs you the listing, not them. Where the label is an internal warehouse part number, pushing it upstream is usually the better trade. The handling you save outweighs the control you give up, and the supplier can absorb a numbering change without a round trip.
Attach the packing spec to the drawing package in the same RFQ, not a follow-up email three weeks later. Ask for part price, packing labor and kitting labor on separate lines. A single lump sum hides who is doing what, and two suppliers quoting the same total can be doing very different amounts of work; split lines let you compare them on the same basis and see which one is quietly subcontracting the bagging.
FAQ
Who should print and apply our labels on sheet metal fabrication orders?
Treat it as a scope decision, not a yes or no. Ask who prints, who applies, who approves artwork and who holds label stock, because that split decides who pays for a mislabel.
Does kitting add cost to sheet metal fabrication quotes?
Yes, kitting adds labor and inventory handling that a bare part price excludes. Ask for part price, packing labor and kitting labor on separate lines so two suppliers can be compared on the same basis.
How do we stop carton artwork from drifting out of sync with part revisions?
Pair every part revision with a carton artwork revision in writing, and name which one wins if they disagree at pack-out. Without that, a dimensional fix can ship inside a carton that still describes the old part.
What should a sheet metal fabrication supplier show before we approve packing?
Approve from one sealed physical carton packed with real parts at real weight, not from a screen proof. A PDF cannot show whether the barcode scans off a matte label on kraft stock or how far the brand color shifts on brown board.
