A club orders forty jerseys in June. By September the number 10 reads like a number 1, the sponsor logo has a crackled edge, and the captain’s name has lost its last two letters somewhere in a washing machine. Nobody blames the wash cycle. They blame the supplier.
That failure has one cause: the graphic was sitting on top of the fabric instead of inside it. Understanding the difference between those two states is the whole argument for sublimation t shirt printing, and it is worth spending ten minutes on before you sign off on a team kit, a merch drop, or a wholesale program.
Printed on the fabric vs. printed into the fabric
Heat transfer vinyl, plastisol screen print, and most direct-to-film work all end the same way: a layer of pigment, plastic, or adhesive is bonded to the surface of the cloth. The bond can be good. It is still a bond between two different materials, and every wash cycle, every stretch at the shoulder seam, every tumble dry attacks that interface. Peeling, cracking, and lifted corners are not defects in that case. They are the expected end state.
Sublimation works on a different mechanism. The dye is a disperse dye printed onto transfer paper. Under heat and pressure the solid dye converts directly into a gas without passing through a liquid stage — that phase change is where the name comes from. At the same moment, the polyester fibre softens and its molecular structure opens. The gas moves into the fibre. When everything cools, the fibre closes again with the dye trapped inside it.
There is no film, no adhesive, no third material. Run your hand across a properly sublimated number and you feel the knit, not the print. There is nothing on the surface to peel, because nothing was ever added to the surface. The colour has become part of the fibre’s own body, which is why full sublimation printing behaves like dyed fabric rather than like a decorated garment.
The trade-off nobody mentions in the sales pitch
The mechanism also explains sublimation’s hard limits, and an honest supplier tells you these before you sample:
- Polyester only. Disperse dye has no affinity for cotton. On a cotton tee it washes straight out. This is why every fabric on a sublimation line is 100% polyester or a high-polyester blend — the polymer is not a cost decision, it is the receiving material.
- Blends print at the polyester ratio. On a 90% polyester / 10% spandex fabric, the colour is carried by the polyester content. The elastane portion does not take disperse dye the same way, which slightly softens the depth of colour on high-stretch bases compared with a 100% polyester interlock.
- White or very light base only. Sublimation dye is translucent and there is no white ink. You cannot sublimate a light logo onto a dark blank. Dark garments are produced by printing the dark colour, not by printing onto dark cloth — which means the design has to be built into the panel from the start.
If your artwork lives on cotton, or needs a metallic or fluorescent that has to match a physical swatch exactly, sublimation is the wrong tool and you should say so at the enquiry stage rather than after the sample. Our published tolerance is 95% colour matching; that is honest for most brand palettes and tight enough for licensed work, but it is a tolerance, not a promise of a perfect metallic.
How the three main decoration methods actually fail
| Method | Where the colour sits | Typical failure mode | Hand feel and breathability | Where it still makes sense |
|---|---|---|---|---|
| Sublimation (all-over print) | Inside the polyester fibre | Fading over long UV exposure; no peeling | Fabric only; knit stays open | Full-panel graphics, gradients, numbers, names, performance kit |
| Heat transfer vinyl / cut film | On top, held by adhesive | Edge lift, corner peel, cracking at stretch points | Sealed patch; blocks airflow under the graphic | One-off names and numbers, late roster changes, cotton |
| Plastisol screen print | On top, cured as a plastic layer | Cracking and flaking across the print area | Noticeable film, stiffens over the print | Large runs of simple spot-colour art, cotton tees |
Why the production order matters more than the printer
Buyers tend to focus on the printing machine. The sequence around it decides durability. Our line runs in a fixed order: digital graphic and pattern design, high-fidelity sublimation printing, precision laser cutting, tailoring and assembly, ironing and finishing, then packaging.
Read that order again. Printing happens before cutting, and cutting happens before sewing. The number, the name, the sponsor block, and the collar trim colour are all printed into flat panels while the garment does not yet exist. Only then are the panels laser cut and assembled with flatlock stitching. Nothing is applied to a finished shirt, so there is no applied element to fail.
Two practical consequences for you as a buyer. First, artwork has to be laid out on the pattern, so late roster changes are far cheaper to catch at the design file stage than after printing. Second, seam alignment of a graphic across panels is a pattern-engineering problem, not a printing problem — if a stripe has to meet across a side seam, that gets solved in the design file. Both of these are handled inside our sublimation print workflow rather than at the press.
The seven tests, and what each one is actually proving
The fabric test panel covers seven items, with third-party reports available from Intertek. Suppliers quote the list; very few explain what each item catches. Here is the translation from lab language into what goes wrong on a pitch.
| Test item | What it verifies | What a failure looks like on a finished jersey |
|---|---|---|
| Colour Fastness | Dye stays locked in the fibre under washing, rubbing, perspiration and light | A white number bleeding pink from the red panel around it; kit dulling after a season |
| Anti-Pilling | Surface fibres resist balling up under abrasion | Fuzzy grey haze over the chest and under the arms that blurs the graphic |
| Shrinkage | Dimensional stability after wash and dry cycles | A size L that fits like an M by week four; numbers distorted out of proportion |
| Seam Strength | Stitch and seam hold under load | A shoulder or side seam opening during a tackle or a stretch |
| Print Adhesion | No loose surface dye or residual coating; any heat-applied element stays put | Colour transferring onto a white towel or an undershirt after the first match |
| Zipper / Trim Durability | Hardware and trims survive repeated cycling and load | A jacket zip splitting mid-season; a cuff binding coming away from the sleeve |
| Wash Durability | Combined performance across repeated laundering | The cumulative version of everything above, which is what a customer actually experiences |
Print Adhesion on a true sublimated garment is worth a note. Because the dye is inside the fibre, this test is not checking whether a layer sticks — it is checking that no unfixed surface dye remains after pressing and that any applied trim holds. Unfixed dye is the single most common defect in cheap sublimation work, and it is exactly what causes colour to migrate onto a player’s skin or undershirt. Inline checks against an AQL 2.5 inspection standard exist to catch it before packing, alongside ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018 systems and SLCP / Intertek WCA social compliance.
Fabric weight changes how the print reads
The same file printed on a 100gsm mesh and a 310gsm stretch knit produces two visibly different results, because there is a different amount of fibre per square metre available to hold dye. Lighter fabrics read slightly softer; heavier knits carry deeper saturation. Buyers who only specify “polyester” get whatever is cheapest that week, then wonder why the reorder looks different. Specify the code.
| Fabric code | Weight | Composition | Typical use |
|---|---|---|---|
| AK8032 | 100gsm | 100% polyester | Lightest match jerseys, hot-climate kit |
| AK8033 | 120gsm | 100% polyester | Standard lightweight jersey and training tops |
| AK8014 | 145gsm | 100% polyester | Mid-weight tees and jerseys with more body |
| AK1064 | 150gsm | Polyester | General-purpose jersey base |
| AK1065 | 150gsm | Polyester interlock | Smooth face for detailed artwork and gradients |
| AK2120 | 170gsm | 90% polyester / 10% spandex | Fitted cuts needing stretch recovery |
| AK2589 | 170gsm | 90/10 mesh | Ventilated panels, esports and training wear |
| AK1100 | 300gsm | 93% polyester / 7% spandex | Heavyweight tops, hoodies, outerwear |
| AK2567 | 310gsm | 92% polyester / 8% spandex | Structured heavyweight pieces with recovery |
Codes, weights and swatch information sit in our fabric lab. Lock the code into your tech pack and your third reorder will match your first.
What to ask before you approve a sample
Four questions separate a supplier who understands the chemistry from one reselling somebody else’s press time. Ask for the fabric code and gsm rather than accepting “polyester”. Ask which of the seven test items have current third-party reports. Ask whether printing happens before or after cutting. And ask for a physical sample — a sublimated sample garment takes 5-7 days, which is short enough that skipping it is never worth the risk on a program of any size.
Then wash the sample. Not once, aggressively. A garment where the dye is inside the fibre will fade slowly and evenly across the whole panel. A garment where the graphic sits on the surface will tell you within a few cycles.
Guangzhou Akilex has run all-over print production since 2008 — 17+ years of OEM/ODM work across 8,000+ m² with 300+ staff and a 300,000-piece monthly capacity, as an officially licensed Umbro manufacturer supplying Europe, North America, Oceania, the Middle East and Africa. Whether you are speccing custom sublimated team jerseys for a league or building a first polyester tee range with a low MOQ, send the artwork, the fabric code you want, and the market you are selling into. Quotes come back in 1-2 business days — get a quote on custom sublimation printing and we will tell you honestly if your project is a better fit for a different decoration method.