Quality Control in Garment Branding

Why branding QC is its own discipline

Garment quality control is a mature, well-documented field concerned with measurements, construction, stitching and finishing. Decoration quality control overlaps with it but asks different questions, because the variables are different. Ink behaves differently by colour, by mesh, by fabric and by cure. A transfer behaves differently by film, by pressure and by dwell. A badge behaves differently by backing and by placement.

The consequence is that decoration defects are usually gradual rather than binary. A print does not fail; it drifts. Colour moves slightly through a long run, registration creeps, coverage thins as the screen loads up. None of that is visible if you only look at the first piece and the last piece, which is why the control points sit inside the run.

The approval chain

Everything downstream depends on an agreed physical reference, and the chain that produces it is short but non-negotiable. Artwork is prepared and separated for the chosen decoration route. A strike-off is produced: the print pulled on the actual fabric, in the actual colours, at the actual size, so that colour, hand feel and coverage can be judged on the real thing rather than on a screen.

The strike-off is approved or corrected. Then a pre-production sample is made as a complete garment with all decoration and trims in place, and that sample is approved and sealed. The sealed sample becomes the reference against which bulk is judged, by both sides. Where a tolerance is agreed, for example on placement or colour variation, it should be written down at this point rather than argued about later.

Screen colour and printed colour are different systems, and no amount of calibration makes a monitor a reliable colour reference. Approving colour on a physical strike-off under agreed lighting is the only version of this that works, and it is what makes a repeat order look like the first one.

Checks during the run

In-line checking means pulling pieces at intervals during production and comparing them to the sealed sample rather than waiting for the end. It catches drift while it is still cheap: a screen starting to block, registration going off, a press running cooler than it should, ink thickening as the session goes on.

The first-off check at the start of a run is the single most valuable check of the day, because everything after it repeats whatever it establishes. First-off approved against the sealed sample, then periodic checks through the run, then a final inspection: that sequence catches the great majority of decoration problems before they multiply.

What gets inspected on a decorated garment

• Placement: distance from the neck seam or hem, and centring against the body, within the agreed tolerance
• Registration: colours landing on each other correctly, with no visible gaps or overlaps
• Colour: matched to the approved strike-off, checked under agreed lighting rather than by memory
• Coverage and opacity: solid where it should be solid, particularly light inks on dark grounds
• Cure or bond: correctly cured print, correctly bonded transfer, no lifting at the edges
• Hand feel: consistent with the approved sample, not heavier or stiffer
• Surface faults: pinholes, smudges, contamination, fibrillation on the print surface
• Trims: label placement and orientation, badge attachment, tag seal and hangtag position
• The garment itself: marking, scorching or distortion caused by the decoration process

Inspection by sampling

Nobody inspects every unit of a large order individually, and doing so would not necessarily improve the outcome. Inspection is normally carried out by drawing a sample from the finished lot using an established sampling scheme, of which the acceptable quality limit approach is the most common. The scheme sets how many pieces to draw for a given lot size and how many defects are tolerated before the lot is rejected.

The levels applied are agreed between buyer and supplier, and are usually tighter for defects the customer will notice immediately than for minor ones. Two things matter more than the numbers themselves. First, that both sides classify defects the same way, because most inspection disputes are really disagreements about whether something is a major or a minor defect. Second, that the classification is written down before production, alongside the sealed sample.

Failure modes that recur

Cracking and peeling after washing usually traces back to cure or bond rather than to the ink itself. Under-cured plastisol and under-bonded transfers look perfect leaving the factory and fail in the customer's machine, which is why a wash check on a production piece is worth more than any visual inspection.

Colour variation between cartons usually means colour was judged by eye across sessions rather than against the sealed reference. Placement variation across sizes usually means the placement was specified as a single absolute measurement rather than being set per size, so the same print sits differently on a small and a triple extra large.

Ghosting and marking on synthetics generally comes from the heat window. Puckering around a badge or a heavy print usually means the fabric and the decoration were not matched to each other in the first place. Almost all of these are decisions made before production rather than mistakes made during it, which is the strongest argument for spending time on sampling.

Documentation and traceability

Good decoration QC leaves a paper trail: the approved artwork file and separations, the approved strike-off, the sealed sample with the approval date, the written tolerances, the in-line check records and the final inspection report. Keep the physical references as well as the photographs, and store them with the style reference.

The value shows up on the repeat order, which is usually placed months later, often by a different person on one side or both. The sealed sample settles in five seconds arguments that otherwise take a week of emails.

Agreeing quality control with a supplier

• Confirm who approves the strike-off and the pre-production sample, and how long approval takes
• Agree placement tolerances in writing, and whether placement is set per size
• Agree the colour reference and the lighting used to judge it
• Agree the defect classification, so major and minor mean the same thing on both sides
• Agree the sampling scheme and levels for final inspection before production starts
• Ask what in-line checks are run and how they are recorded
• Ask for a wash-checked production piece, not only a pre-production sample
• Keep sealed samples for every style, and refer to them on every reorder