Sublimation vs DTG printing: how each one works

Sublimation and DTG are the two methods most often confused when people start printing on apparel and soft goods, partly because both can produce full-colour, photo-quality results. But under the bonnet they couldn’t be more different — one is a chemistry trick that dyes the fibres from within, the other an inkjet that lays ink on the surface — and those differences dictate exactly which fabrics, colours and products each one suits. Get the pairing right and the print looks stunning and lasts; get it wrong and it either won’t bond at all or won’t survive the wash. Here’s how each works and where each belongs.

How dye sublimation works

Sublimation borrows its name from the physics: a solid turning straight into a gas without passing through a liquid stage. The design is first printed in reverse with special sublimation dyes onto transfer paper. That paper is laid against the product and pressed under heat — typically around 195–205°C (roughly 385–400°F) for about 45–60 seconds. At that temperature the solid dye sublimes into a gas, the polyester fibres open slightly, and the gas penetrates and bonds inside them before the fibres cool and close around it.

The result is that the colour becomes part of the fabric rather than a layer sitting on top. There’s no coating to feel, because there is no coating — the dye is now inside the fibre itself. This is also why sublimation does all-over and edge-to-edge printing so naturally: you’re dyeing the whole panel, not stamping a patch onto it, so seamless full-garment graphics are straightforward.

How DTG (direct-to-garment) works

DTG is, at heart, a specialised inkjet printer for fabric. The garment is loaded flat onto a platen, and the printer sprays water-based pigment inks directly onto its surface, building the image in CMYK much as a desktop printer builds a photo on paper. The print is then heat-cured (pressed or run through a dryer) to set the ink and make it washfast. Because it’s a true inkjet, DTG reproduces fine detail, smooth gradients and photographic, many-coloured artwork without the colour-separation limits of older methods like screen printing.

Crucially, on dark garments DTG first lays down a white ink underbase — a printed layer of white that the coloured inks sit on top of. Without it, translucent water-based colour printed straight onto a black tee would simply disappear into the fabric. The underbase gives the colours something opaque to show against, which is what lets DTG print vivid artwork on garments of any colour.

Fabric and colour constraints — the deciding factor

The fabric and colour limits are where the choice is usually made, because each method is chemically tied to certain materials:

• Sublimation needs polyester. The dye bonds with polymer fibres, not natural ones — it won’t take on pure cotton. Look for 100% polyester, or at least a high polyester content (around 65% is a common practical minimum); lower polyester means paler, faster-fading results.
• Sublimation needs light fabric. The dye is translucent and has no white ink, so it can only darken what’s underneath. On a white or pale poly garment colours sing; on a dark one they barely show. There is no way to sublimate light colours onto a black shirt.
• DTG loves cotton. Water-based pigment inks bond best to natural fibres, so 100% cotton (or high-cotton blends) gives the richest DTG results — broadly the opposite preference to sublimation.
• DTG handles any garment colour. Thanks to the white underbase, DTG prints full-colour designs on black, navy or any dark fabric — something sublimation simply cannot do.

Durability and hand-feel

Because sublimation dyes the fibre itself, there’s nothing on the surface to crack, peel or flake, and the print can’t really wash off — it fades only as the fabric itself does. Hand-feel is its other big win: since the colour is inside the fibre, a sublimated area feels exactly like unprinted fabric, with no texture or stiffness at all. For all-over designs and anything where a zero-feel finish matters, that’s hard to beat.

DTG sits ink on the surface, so its durability, while good with proper curing and care, is a notch below sublimation: over many washes prints can gradually fade or, on heavy ink coverage, show some cracking. Hand-feel is generally soft and the ink is thin, though a dark-garment print with a full white underbase carries a little more body than a light-garment one. For most cotton tees the finish is comfortable and the detail excellent — you’re just trading a touch of longevity for the ability to print any colour fabric and any image.

Which method a product uses is one more operational decision that shouldn’t land on the creator. Realform’s agents take your finished artwork and compose it onto the right product made the right way — routing a vivid all-over design to a sublimated polyester item, or a detailed illustration to DTG on cotton — then handle the listing, ordering and fulfilment around it. The agent never regenerates or restyles your image to “fit” a process; it matches the product and production method to the art you already made, so your work prints faithfully and you keep the credit and the income.

Which suits which product

The two methods carve up the catalogue fairly cleanly. Sublimation owns all-over, polyester-based goods: cut-and-sew sportswear and jerseys, leggings, swimwear, all-over-print hoodies and tees, plus hard goods with a poly coating like mugs, phone cases, mouse mats and metal prints. Anywhere you want seamless, edge-to-edge colour on a light synthetic surface, it’s the natural choice.

DTG owns the classic printed-tee market and detailed artwork on natural fibres: cotton t-shirts, sweatshirts and tote bags carrying photographic or many-coloured designs, in any garment colour, with no minimum order. If the product is a cotton garment and the design is intricate or full-colour, DTG is almost always the answer.

• Choose sublimation for: all-over polyester apparel, sportswear, and poly-coated hard goods (mugs, cases) — light colours only.
• Choose DTG for: detailed or photographic designs on cotton tees, hoodies and totes — in any garment colour.
• Remember the trade: sublimation gives unbeatable durability and a zero-feel finish but is locked to light polyester; DTG gives photographic detail on cotton of any colour, with very good (not quite as bulletproof) wash life.