Printed underwear has to look intentional both flat and stretched on a shaped garment. A print approved on a small relaxed swatch may distort across a pouch, break at a leg opening or lose its colour balance beside a branded waistband.
Choose the print layout and process with the garment construction, then approve the actual fabric, colour and extension conditions. This guide concerns body-fabric graphics. Waistband logos and legally required inside labels have separate specifications.
Decide between all-over and positioned artwork
| Layout | Development decision | Production check |
|---|---|---|
| All-over repeat | Scale, repeat direction and how motifs may fall at seams | Cut-panel orientation, repeat continuity where required and acceptable unmatched areas |
| Positioned motif | Anchor points and placement by size | Distance from named seams and appearance at wearing extension |
| Engineered panel print | Artwork tied to each pattern piece | Panel identity, cutting alignment and assembly registration |
State whether matching across the pouch or side seams is required, preferred or intentionally uncontrolled. Exact matching can change cutting efficiency, print preparation and the quotation. An all-over pattern with distinct faces, words or directional symbols needs more placement control than an abstract texture.
For a contoured pouch, review how artwork changes across the shaped seam and volume. A motif centred on a flat front may not remain centred when that panel is replaced by a multi-piece pouch.
Select the process for the actual substrate
Ask the printer which process is compatible with the fibre blend, fabric finish, ground colour and extension expected in wear. Do not choose from a method name alone. A print system suitable for one polyester fabric is not automatically suitable for a cotton blend, and a transfer that adheres to a sample may still be too stiff for the contact area.
Request a strike-off on the intended fabric and colour. Identify the ink or transfer system, underbase if used, preparation and curing/application controls. Confirm who performs the work and how changes are authorised. Avoid prescribing generic heat settings to an elastane blend without the supplier’s material guidance and trial evidence.
Specify artwork in garment coordinates
Give artwork size, orientation and distance from named finished seams. State whether measurements are taken relaxed and flat. For size grading, decide whether the graphic stays one size, scales with the pattern or changes by size group. Provide a placement diagram for each rule rather than asking the operator to “centre it by eye.”
Keep critical text and motifs away from seam allowances unless the design deliberately accommodates the interruption. Show the waistband and leg finishes in the artwork review. A visually matched colour on two substrates may need two separate physical approvals.
Use a print and washed-sample comparison sheet
| Condition | Record | Reason to revise |
|---|---|---|
| Relaxed strike-off | Colour, detail, hand, opacity and substrate reference | Artwork or appearance differs from approved intent |
| Defined extension | Direction and amount of extension; motif shape and surface change | Cracks, whitening, excessive distortion or restriction |
| Assembled garment | Pouch, gusset, seam and waistband relationships | Misplaced motif, unacceptable interruption or uncomfortable print area |
| After agreed care | Procedure, cycles, drying and conditioning | Colour change, transfer, peeling, cracking or loss of detail |
| After wear assessment | Contact feel and position during movement | Local discomfort or design movement that defeats the brief |
Use the same extension and viewing conditions when comparing variants. A photograph taken while one swatch is stretched farther than another does not isolate print performance. Where a laboratory test is required, agree an appropriate method and acceptance criteria before testing.
Approve colour with a physical standard
A named colour reference communicates intent, but the actual shade depends on the fabric colour, surface, print system and application. Keep the approved strike-off and record its substrate. Agree lighting for visual assessment and, if instrumental colour limits are used, the formula, instrument conditions and decision procedure.
Compare the garment body and waistband together under the agreed conditions. Review colour transfer risk where dark graphics contact pale fabrics or skin. Obtain applicable rubbing and laundering evidence for the actual printed construction; a report for unprinted fabric does not establish print durability.
Control the printed panels through assembly
Identify print lots and panel orientation. At first output, check cutting against the print layout, then assemble a complete garment before running the full quantity. Confirm the placement across range-end sizes and inspect seam intersections. A correct strike-off cannot prevent errors introduced by cutting or sewing.
Retain a relaxed printed swatch, an assembled approved sample and a washed reference. Record artwork revision, print process, material lot and any approved placement variation. Reassess the affected approvals if the fabric, finish, printer or print system changes; the same digital artwork does not make those changes equivalent.
For colour disputes, see bulk versus strike-off colour checks. The print-colour specification guide covers colour measurement in more detail. Use the waistband logo guide for the separate elastic component.
