Sampling is the cheapest place to find production problems. A 5 mm logo error costs a revised sample and three days; the same error on a thousand pouches costs a rework line, a new inspection and a delayed launch. Yet most sampling delays and most "the bulk does not match the sample" disputes come from the same cause: the sampling stage was treated as a formality instead of a gate.
This is the sequence a custom cosmetic bag should follow, what you should get at each stage, and where it usually goes wrong.
1. What a usable brief contains
A good sample starts from a good brief. The factory can work from a tech pack, a reference sample, or a detailed description — but whichever form it takes, six things must be explicit:
- Dimensions — length, height, gusset width, handle drop, zip opening, each with a tolerance (±5 mm is realistic for sewn goods)
- Material — fabric type, weight (GSM or oz), backing, lining; name a standard, not "something like neoprene"
- Decoration — method, position, size in millimetres, colour reference (Pantone or physical swatch), plus a vector file
- Hardware — zipper type, size, slider and puller, finish; D-rings, snaps, buckles if any. See the hardware specification checklist
- Packaging — polybag, hangtag, individual box, barcode, carton markings
- Target price and quantity — so the sample is engineered for the program, not for an unrealistic ideal
A factory that asks questions at this stage is doing its job. A factory that says yes to everything is saving the questions for the invoice.
2. The four-stage sampling sequence
| Stage | What you receive | Typical time |
|---|---|---|
| Brief review | Questions, feasibility feedback, material suggestion | 1–2 working days |
| Counter sample (prototype) | First physical sample, made with available materials | 5–10 working days |
| Revision round(s) | Adjusted sample per your comments | 3–5 working days per round |
| Pre-production sample (PPS) | Made with bulk fabric, bulk trims, bulk decoration | After bulk materials arrive |
Two things deserve emphasis. First, the prototype often uses the closest available material, not the exact bulk fabric — that is normal, and the PPS exists precisely to close that gap. Second, the PPS must be made with the same fabric, trims and decoration as the bulk run, then approved and sealed. One sealed copy stays with you, one with the factory. Every finished piece is measured against it. Skip this and "the bulk does not match" becomes a dispute about opinion.
3. The eight-point review that catches the 5 mm error
When the sample arrives, do not just open it and admire it. Run the same checklist every time:
- Dimensions — measure every specified point, including the ones that "must obviously be right". Logo position measured from the same reference edges as in the brief.
- Material — weight, hand-feel, colour against the reference. Bend it, crush it, smell it.
- Construction — stitch density and evenness, bartacks at zip ends, seam alignment, piping straightness.
- Zip and hardware — open and close twenty times. Fill the pouch and close it again: a zip that runs empty but gapes when full is a fail.
- Decoration — method, position, colour, edge definition. Check a wash or wipe test on transfer prints.
- Lining — material, colour, and how it is attached at the seams, not just at the opening.
- Packaging — sample the polybag, the hangtag position, the barcode scannability.
- Function — put the intended products inside. A pouch designed for a 50 ml tube that fits a 100 ml tube "just about" is not a fit.
4. Colour: the silent cause of rejected samples
Colour approval is where sampling most often stalls, because colour is evaluated by eye under whatever light is in the room. The professional sequence:
- Reference — a Pantone number or a physical swatch, not a photograph.
- Lab dip — the dye house produces a small swatch; you approve the lab dip before the bulk fabric is dyed.
- Lighting standard — approve under D65 (daylight) and also check under store lighting; two dye lots that match under one can disagree under the other.
- Shade band — for strict programs, agree a light and a dark limit sample; anything between them passes.
And remember the principle from the costing article: custom dyeing has a batch minimum. Approving a stock shade instead can cut a thousand pieces off the MOQ.
5. The traps that make "approved sample" meaningless
- The sample room is not the production line. Samples are made by the factory's best hands. Ask the PPS to be cut and sewn from the bulk run, not re-made by the sample room.
- "Close enough" approvals. Approving a 4 mm misplacement "because it is only a sample" teaches the factory that tolerances are decorative. Reject or accept — but decide in writing.
- Substitute materials at PPS. The PPS exists to expose bulk materials. If the PPS uses stock fabric "for speed", you have approved a fiction.
- No sealed copy on your side. Without a physical reference in your office, every later dispute is settled by whoever kept the sample.
- Undocumented revision history. Each round should produce a dated, versioned comment sheet. Version three arriving with the version-two comment sheet is how old mistakes come back.
6. Costs and credits
Expect to pay a sample fee for the prototype — it is normal practice, covering materials, labour and courier. At GAOHE the sample fee is credited against the first bulk order, so it costs you nothing once the program proceeds. Revision rounds on genuinely changed briefs may carry a new charge; rounds fixing the factory's own deviation from the approved sample should not.
On timing: a straightforward cosmetic pouch with existing materials can reach an approved counter sample in about two weeks. Add a week per genuine revision, and remember that the PPS waits for bulk materials — it cannot be rushed ahead of the fabric.
The short version
Brief with six explicit elements. Expect questions before a sample, not silence. Approve the lab dip before the fabric. Reject precisely, in writing, with measurements. Insist on a PPS from bulk materials, seal a copy on both sides, and treat the sealed sample as the contract the bulk has to match. Do that, and the "bulk does not match the sample" conversation never happens.
GAOHE develops cosmetic pouches, totes and gift packaging in-house in Shenzhen — the sample room is inside the factory, and every bulk run is measured against the sealed PPS. Send a brief or a reference sample and we will start the sequence.