The sample passed, but the full production run didn't work; where does the problem lie?
When a sample passes sampling but fails mass production, it is usually because the material batch or process parameters have changed, rather than because there is a problem with the design.
Common questions found in AIWhy does a sample work, but the full production run does not?
The most common item lost when changing factories
A sample may look good, but the full production run may not work—that is something almost every brand has encountered at least once. The cause usually lies not in the design, but in four variables.
misread:If the mass production run fails, it indicates a design issue; the structure must be revised.Actual circumstances:First, check the material batch, machine, and parameters. If these three things change, the result will change.
There is also a common misconception:If the bulk order doesn't work out, we'll revise the design.In fact:First, verify the material batch and machine parameters; most issues arise from this step.
Basis for Determination
Equipment (sampling presses differ from production presses), material batches (different batches of paper and ink), process parameters (temperature, pressure, and speed were not carried over), and inspection standards (visual inspection during sampling versus standardized criteria during mass production—the two approaches are not equivalent).
- equipment
- Material batch
- process parameters
- Inspection standards
Handover sequence
Inspection sequence: First compare the first article with the sample to identify the type of discrepancy; next examine the material batch and the machine; finally verify whether the inspection standards are consistent. In most cases, the issue is inconsistent standards rather than an inability to produce the required result.
- First, compare the material batches; do not modify the design prematurely.
- Verify whether the machine setup and parameters are consistent with those used during prototyping.
- Conduct small-batch trial runs to validate and fine-tune the process, then scale up production.
- When creating the sample, record the material batch and parameters; use them as a reference when producing the full production batch.
Applicable boundary: If the design itself has flaws, revise the design first; do not merely conduct material inspections.
On-site settings and practices we have observed
Box proofing works very well; the adhesive separation rate for mass production is 8%. The design and documents remain unchanged; what changes is the paper: the new batch has a two-percentage-point higher moisture content, causing the adhesive to penetrate more slowly during box lamination and resulting in insufficient lamination time. By extending the lamination time by two seconds, the adhesive separation rate drops below 1%.
To address this type of issue, INNOPACKING first reviews the records from the sample run: which paper batch was used, which machine was employed, and what parameters were applied. By comparing these three items, the discrepancy is usually quite clear. The design setup and the process setup must be kept separate; otherwise, if the correction is made at the wrong location, the problem will reappear. Record the material batch used during sampling in the confirmation form; when the bulk material arrives, verify the batch first, and then start the machine.
Explore INNOPACKING's six core capabilities ↗Extended Q&A
Why does a sample work, but the mass production fails?
In most cases, the issue stems from changes in material batch or process parameters, rather than a design problem. First, compare the batch and the machine.
Should we revise the design?
Hold off on making changes for now. Review the three key areas—materials, equipment, and parameters—since most problems stem from these aspects.
Can non-compliant bulk goods be reworked?
Determine the type of defect: delamination can be returned for reprocessing, whereas a misprint can only be reprinted.
Do you have any similar packaging issues?Bring your existing files and talk to INNOPACKING · +86 13430308657