How to Press DTF on Polyester Without Scorching

The polyester band.

Dye migration, explained.

Scorching is obvious and immediate. Dye migration is neither, which is what makes it the more expensive failure.

Polyester is dyed with disperse dyes, and under heat those dyes sublimate — they turn from solid to gas without melting. That gas moves, and if there is a freshly applied print sitting on the fabric, it moves into it. A crisp white print on a red performance shirt comes off the press looking perfect and turns pink over the next few days.

What actually reduces it

Hi-vis and flame-resistant garments.

A lot of the polyester we print for ends up on a job site, and safety apparel needs more care than a team jersey does.

Hi-vis

The base fabric is normally polyester and presses at 270–285°F like any other. Two rules: never press over the reflective tape — it will not survive the heat and the tape is doing a job — and keep the print clear of areas the garment's certification requires to remain visible. Placement on hi-vis is a safety decision as much as a design one.

Flame-resistant apparel

Check with the garment manufacturer before decorating certified FR apparel. FR garments are certified as complete assemblies, and applying anything to one can affect that certification. This is genuinely not a question we can answer for your specific garment, and we would rather say so than guess. More on workwear →

Polyester is where DTF wins.

Direct-to-garment printing needs cotton — its inks are formulated to bond with cotton fibres, and results on polyester are unreliable at best. Screen printing can do polyester but needs the right ink system and a setup cost that only makes sense at volume.

DTF does not care what the fabric is, because the adhesive layer does the bonding rather than the ink. That is why team jerseys, hi-vis workwear, performance tees, fleece and softshells are overwhelmingly DTF work — and why an awful lot of Canadian apparel orders end up here rather than with a DTG printer. DTF vs DTG in full →

Frequently asked questions

What temperature do you press DTF on polyester?

270–285°F (132–140°C) for 8–10 seconds, rather than the 305–315°F you would use on cotton. Polyester is heat-sensitive and will scorch, gloss or shrink at cotton temperatures.

What is dye migration?

The dye in a polyester garment turning to gas under heat and moving up into your print. It shows up as the garment colour bleeding through — most visibly as a white print on a red or navy shirt going pink or blue over the following days or washes.

How do I stop dye migration?

Keep the temperature and dwell time down: 270–285°F for 8–10 seconds. Lighter-coloured garments migrate less than deep reds, navies and blacks. And test one garment first — dye behaviour varies by manufacturer and dye lot, not just by colour.

Can you press DTF on hi-vis safety shirts?

Yes, on the polyester hi-vis is normally made from, at 270–285°F. Keep the print clear of reflective tape and away from any area the garment's certification requires to remain visible. For certified flame-resistant garments, check with the manufacturer before decorating — FR apparel is certified as a complete assembly.

Does DTF work on performance and moisture-wicking fabric?

Yes — this is one of the main reasons DTF is used instead of direct-to-garment printing on team and athletic apparel. Use the lower temperature band and keep the dwell short.

Why does my print look shiny on polyester?

You are too hot. Polyester glosses under excessive heat, leaving a shiny rectangle where the platen sat. Drop the temperature and shorten the press — and check the platen with a laser thermometer, because the dial may be reading low.