Sublimation, DTF, UV DTF or UV flatbed: which one prints your product

Four processes get compared as if they were competing versions of the same thing. They are not — they work by different physics and each has materials the others simply cannot do. Pick by what you are printing on, not by what is cheapest.

The short version

Sublimation: polyester, or a polyester coating

Sublimation dye enters the polymer itself, which is why the result has no hand-feel and will not crack. It is also why the substrate list is so narrow.

Epson states the constraint plainly: it works on “polyester or polyester-coated goods”, there is no white ink — “dye-sublimation doesn’t use white ink” — and you should “avoid cotton or dark fabrics and using dye-sub for long-term outdoor applications.”

No white ink is the decisive limitation. The substrate has to be white or light, because the dye is transparent and there is nothing to print an opaque base with.

The strongest proof that sublimation cannot do cotton is commercial rather than technical: Sawgrass sells separate ink lines for cotton. If sublimation ink did cotton, those products would not exist.

Published press settings, useful for costing time:

• Ceramic mug — 350–400 °F, 150–210 s, 40 psi
• Metal — 375–400 °F, 60 s
• Polyester fabric — 400 °F, 35–40 s
• ChromaLuxe aluminium panel — 385 °F (195 °C), 1:30–1:35

A detail that matters in India: Sawgrass notes that “all settings are made based on sea level. If you are in a higher altitude area, the sublimation process will go faster and you may need to lower the time.” A press calibrated in Surat behaves differently in Pune or Bengaluru.

And a conflict worth knowing: ChromaLuxe publishes 385 °F for its panels while a major distributor lists around 400 °F. Calibrate your own press with an infrared thermometer rather than trusting either.

DTF: the only one that does cotton and darks

Ink is printed onto a film, adhesive powder is applied, cured, and the whole thing is heat-pressed onto the garment. The powder is thermoplastic polyurethane — not a glue that dries, but a polymer that melts, flows and re-solidifies.

The fabric list is DTF’s entire commercial argument: cotton, cotton-poly blends, polyester, nylon, tri-blend, denim, twill, canvas, spandex, leather, and beanies. Nothing else on this page touches most of that.

Published press instructions from a large transfer supplier: around 310–320 °F (155–160 °C), first press about 12 seconds, medium-high pressure — and then a second press of about 12 seconds after peeling, which “greatly improves durability and softness while reducing shine.”

That second press is the step most shops skip, and it is the difference between a transfer that survives washing and one that does not.

One calibration warning worth acting on: the display temperature on a heat press and the actual platen surface temperature can differ by 5–15 °C. Verify with an infrared thermometer.

UV DTF: cold transfer for hard goods

A newer process, and the one most misrepresented online. UV ink is printed onto an A film, a B film is laminated over it, and the sandwich transfers by pressure — no heat press required.

It works on glass, ceramics, coated metal, acrylic, PVC, painted wood, leather and — its real advantage — curved goods a flatbed cannot reach. It fails on “porous, heavily textured, flexible, greasy, or low-energy materials.”

It is not for textiles. Vendors are consistent on this: UV DTF is for hard surfaces; garment DTF uses hot-melt powder and a heat press.

Two claims to be sceptical of. One vendor advertises 2–5 year outdoor durability and full waterproofing; another selling the same process publishes no outdoor claim at all, specifies a 24–72 hour cure window and recommends hand washing. The spread between two vendors describing the same product is the story. Test it on your own product before you promise a customer anything.

UV flatbed: printing the object itself

No transfer, no film, no consumable carrier. Ink is jetted onto the item and cured instantly, which is why it handles rigid, thick and irregular objects that no transfer process reaches — and why white and varnish channels matter so much. White lets one artwork work on a clear case and a black one; varnish adds a raised finish a customer can feel.

The trade-off is that it will not print fabric, and it will not print anything that has to flex.

See UV flatbed printers and printing phone cases.

By product

• Phone cases — UV flatbed for hard cases, including a white base for black ones. UV DTF for curved or awkward shapes. Sublimation only on white polyester-coated inserts.
• Mugs — sublimation on coated mugs, with a rotary press. UV DTF as a transfer. UV flatbed with a rotary jig.
• Wooden plaques and frames — UV flatbed, direct.
• Metal signage and nameplates — UV flatbed. See printing on metal.
• Acrylic and glass — UV flatbed with white. Acrylic, glass.
• T-shirts — DTF. Not UV, not sublimation unless the garment is white polyester.

Why silicone cases will never print

This question comes up constantly, and the answer is physics rather than technique.

Silicone (PDMS) has a surface energy of about 20.1 dyne/cm. Research published in RSC Advances shows that adding 10% PDMS to thermoplastic polyurethane drags its surface energy from 36.1 down to 23.1 mN/m — and that paper sets below 25 mJ/m² as the anti-graffiti threshold.

A surface engineered so that spray paint cannot stick will reject UV ink for exactly the same reason. No primer, no plasma treatment and no machine changes that.

Polycarbonate, at 44.0 dyne/cm, is the opposite — the easiest case material there is. If you are sourcing blanks to print, that single number is the one to buy on. Background in surface energy and adhesion.

What we are not going to repeat

“DTF transfers survive 50+ washes.” No manufacturer publishes a wash count against any recognised standard. Roland DGA’s own article on transfer durability discusses wash resistance and gives no numbers and no test method. The absence is the point: those figures are marketing, not standards-tested results.

The same goes for UV DTF outdoor durability, dishwasher safety, and per-unit economics for any of the four processes. We found no sourceable consumable costs, so we are not publishing any — see how to calculate your own ink cost, which is a better answer anyway.

And the widely-quoted “65% polyester minimum” for sublimation is repeated everywhere and pinnable to nothing. The honest version is that the higher the polyester content, the stronger and more durable the result.

Which machine is which business

The real decision is not technical. A heat press and a sublimation printer is a few tens of thousands of rupees and a small-format gifting business. A UV flatbed is a capital purchase that puts you in signage, décor, industrial marking and gifting at once.

If most of your intended work is cotton garments, none of our machines is the right answer and we will say so. If it is hard goods — cases, panels, glass, plaques, nameplates — then it is a flatbed, and the question becomes which size. Tell us what you print and we will name one: get a quote, or see gifting and personalisation.

Sources

• Epson — sublimation substrate limits, absence of white ink, cotton and outdoor warnings
• Sawgrass — heat press settings by substrate; altitude note; separate cotton ink lines
• ChromaLuxe — panel press settings
• Ninja Transfers — DTF press temperature, first and second press, fabric compatibility list
• UV DTF vendor documentation (multiple, conflicting) — A/B film process, substrate suitability, durability claims
• ACCU DYNE TEST — PDMS and polycarbonate surface energy
• RSC Advances via PMC10108671 — PDMS content, surface energy and the anti-graffiti threshold