If you have ever bought a custom football kit that looked sharp in the mock-up and tired after five washes — faded panels, cracked numbers, a sponsor logo peeling at the corner — you have met the difference between a printed kit and a sublimated one. Sublimation is now the default technology for teamwear, and understanding how it works is what lets a buyer compare quotations honestly, brief a designer correctly, and avoid the predictable failures. This guide covers the mechanism, the design requirements, the fabric constraints, the sampling workflow and the real cost curve at 50, 250 and 1,000 units.
## How Dye Sublimation Actually Works
Sublimation is not printing onto fabric. It is printing a gas that becomes part of the fabric. The process runs in four stages:
- 1. Design preparation. Your artwork is converted into a digital file at the correct size and colour profile for the printer.
- 2. Transfer printing. The design is printed in reverse (mirrored) onto a special transfer paper using sublimation inks — disperse dyes suspended in a carrier.
- 3. Heat and pressure. The paper is placed against the fabric and pressed at roughly 180–200°C for 30–60 seconds. At that temperature the solid dye converts directly into a gas — the phase change is called sublimation, and it is where the technique gets its name.
- 4. Permanent bonding. The gas penetrates the polymer structure of the polyester fibre and solidifies inside it as it cools. The colour is now inside the thread, not sitting on top of it.
That final step is the whole point. Because the dye is embedded in the fibre, there is no layer to crack, peel, flake or wear off. The graphic also cannot be felt on the surface, and it adds no weight or stiffness.
## Why It Does Not Crack, Peel or Fade
The failure modes of ordinary printing are all surface failures. Screen print lays a film of ink on top of the weave; heat-transfer vinyl applies an adhesive-backed sheet. Both can lift at an edge, crack when the fabric stretches, or fade as the surface ink abrades — and both are damaged by the very laundering that sports kit receives.
Sublimation sidesteps all three because there is nothing on the surface to fail. This is why the same technology used for football kits is used for performance sportswear, cycling kit and swimwear. It also survives repeated industrial washing far better than surface decoration, which matters enormously for teamwear that is washed on a schedule by a club or a school.
The honest caveat: the dye is only as permanent as the fibre it bonds with. Sublimation works on polyester. It does not work properly on 100% cotton, because cotton fibre has no polymer structure for the gas to enter. On cotton, the image sits on the surface, looks washed out, and fades quickly. If a supplier offers “sublimated” cotton kits at a low price, they are describing something else.
## Fabric Compatibility: The Constraint That Decides Everything
This is the single most important technical point for a buyer. Because sublimation requires a polymer fibre, the fabric choice is limited to polyesters and high-polyester blends:
| Fabric | Polyester content | Sublimation suitability | Typical use |
|---|---|---|---|
| Micro interlock mesh | 100% | Excellent — the standard | Football kits, jerseys |
| Birdseye | 100% | Excellent, textured surface | Training wear, shirts |
| Polyester interlock | 100% | Excellent | Teamwear, shorts |
| Poly-elastane performance knit | 80–90% | Very good | Compression, cycling, swim |
| Cotton/poly 65/35 | 35% | Poor — muted, fades | Should be screen printed or embroidered instead |
| 100% cotton | 0% | Not suitable | Screen print, embroidery or heat transfer only |
Fabric weight also matters and is the second thing to specify. Common reference points: 150–160 GSM micro interlock for match-day jerseys, 165–190 GSM birdseye for training wear, 180–220 GSM for polo-style kit, and 240–280 GSM for hoodies and tracksuit tops. A quotation that does not state GSM is not a specification.
Choose light-coloured base fabrics wherever the design allows. Sublimation dyes onto a white or light substrate produce bright, accurate colour. Printing onto a dark base produces a muted, heavier result and limits the achievable palette — sometimes an on-purpose aesthetic choice, but never an accident you want to discover at sampling.
## Design File Requirements: The Brief Your Designer Needs
Most sublimation problems that buyers blame on the factory began as an artwork problem. Send your manufacturer these five things and the revision cycle disappears:
- 1. Vector artwork — AI, EPS, SVG or print-ready PDF. Not a JPEG, not a screenshot, not a phone photo of a sketch. Vector files scale without loss, which matters because sublimation artwork is printed at garment scale, not label scale.
- 2. Pantone references for every brand colour. “Royal blue” is not a colour; a Pantone number is. Club colours and sponsor colours should both be specified.
- 3. Bleed and seam allowance. Sublimation prints the whole panel, so the design extends to the cut edge. Ask your manufacturer for their bleed specification and design within it, so no graphic is lost in the seam.
- 4. Correct dimensions per panel — the front, back and sleeve panels are printed separately and each needs artwork at its own measurement. A single flat “kit design” image is not production artwork.
- 5. Font and name/number specification. Supply the font file or confirm the manufacturer’s stock variant, and state the exact spellings and numbers per size, including any junior squad variants.
For full-colour photographic designs, confirm the resolution at final print size. Low-resolution images that look acceptable on a screen will look soft on a jersey front.
## Names, Numbers and Sponsor Placement
Teamwear orders are almost never one SKU. They are a size-and-number matrix, which is where order administration fails. Specify:
- Numbering set — the squad number per garment, in the correct font and colour, with an outline if required.
- Player names — exact spelling, with an approval sheet circulated to the club before production. Do not accept a verbal list; a mis-spelled name on a match shirt is a replacement, not a reprint.
- Sponsor placement — position, size and colour on front, back and sleeve, with the sponsor’s own brand guidelines attached.
- League or competition badges — which sleeve, which size, and confirmation that you have permission to reproduce them.
- Junior variants — different size runs and often different number ranges.
A capable manufacturer runs the numbers on the same line as the base design, using the same sublimation process as one continuous print, rather than applying names and numbers as a separate heat-transfer step afterwards. Ask which method they use — because names applied post-production can peel, undoing the whole advantage of sublimation.
## Sampling: The Step You Must Not Skip
Design a two-stage sample process and hold to it.
Stage one — digital mock-up. Free and fast, usually 24–48 hours. This confirms layout, colour intent and placement. It is not a production proof; do not approve a digital mock-up for bulk.
Stage two — physical sublimated sample. Typically 7–14 days. This is the proof that matters. When it arrives, check:
- Colour fidelity against your Pantone references, in daylight, not under office lighting
- Sharpness of fine detail, small text and thin outlines
- Panel alignment — do the front and back graphics line up at the seam?
- Size and fit measured against a spec sheet, in your actual size range
- Name and number placement and correct spelling
- Fabric weight and hand-feel, confirmed against the GSM specified
- Wash test — wash it twice and compare before you place bulk
Approve the physical sample as the master. Every subsequent reorder should be produced to that same master, which is why factories that keep your approved sample and artwork on file deliver consistent reorders.
## Cost Curve: What Volume Does to Price
Sublimation has meaningful setup costs — artwork separation, print preparation and press setup — and a per-unit cost that falls sharply with volume. The practical shape of the curve:
| Order size | Setup amortisation | Per-unit price | Realistic use |
|---|---|---|---|
| 50 kits | High — setup dominates | Highest | Club trial, start-up brand test |
| 250 kits | Moderate | Mid, 25–40% below the 50-unit price | Full club order, school programme |
| 1,000+ kits | Low | Lowest, often 40–55% below the 50-unit price | League programme, brand production run |
Practical guidance for buyers: if you know you will order multiple times, run one consolidated press setup rather than several small runs. And if your first order is a trial of 50 units, take the small price penalty deliberately and treat it as research cost — not as a problem to negotiate away.
## Common Mistakes That Cost Buyers Money
- Approving a digital mock-up for bulk. Layout looks right; the physical colour often does not.
- Specifying cotton and expecting a vivid result. The material cannot support the process.
- Sending JPEG artwork. Fine detail softens, and colours drift.
- Omitting GSM from the purchase order. You will receive whatever the factory had on the roll.
- No size grading sheet. The kit fits differently across the range.
- No name-spelling approval sheet. The single most common cause of replacement claims.
- Skipping the wash test. Two washes on a sample costs nothing and prevents a bulk failure.
- Buying on unit price alone. A garment with the wrong GSM or muted colour costs far more in returns than the margin you negotiated.
## Frequently Asked Questions
Q: Can sublimation be done on cotton? No, not properly. Sublimation requires a polymer fibre, so it works on polyester and high-polyester blends. On cotton the image sits on the surface, appears muted and fades quickly.
Q: Will sublimated prints crack or peel? No. The dye is embedded inside the fibre, so there is no surface layer to crack or lift. This is the key advantage over screen print and heat transfer.
Q: What is the minimum order for custom sublimated kits? Typically 50 pieces per design, with significantly better pricing from 500 pieces.
Q: How long does production take? Digital mock-up 24–48 hours, physical sample 7–14 days, and bulk production 20–35 days from approval.
Q: Can you match our exact club colours? Yes — supply Pantone references and we will match them on the sublimated sample, which is your proof before bulk.
Q: Can names and numbers be sublimated rather than applied later? Yes, and they should be — sublimated names and numbers become part of the fabric and cannot peel, unlike post-applied transfers.
Q: What file format should I send? Vector artwork in AI, EPS, SVG or print-ready PDF, plus Pantone references and your manufacturer’s bleed specification.
Planning a kit programme? Send us your artwork, size matrix and quantity, and we will return a free digital mock-up, sample plan and tiered pricing within 24–48 hours. Request a quote, or browse our sportswear and T-shirt ranges.