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To sublimate a shirt, print a mirrored design on sublimation paper, lay it face-down on a white or light polyester shirt, cover it with butcher paper and press at about 400°F (204°C) for 35–60 seconds with medium pressure. Then peel the paper straight up while it's hot. The fabric matters more than anything else: sublimation dye only bonds with polyester, so a cotton shirt won't hold the print.
Below is the full process, the starting settings press makers publish, and what to do when a shirt comes out faded, blurry or with a box outline.
What you need to sublimate a shirt
- A high-polyester shirt in white or a light color. Cricut recommends 90% polyester or more. Our best shirts for sublimation guide covers blanks worth buying.
- A sublimation printer, ink and paper. An 8.5-inch printer covers kids' shirts and chest logos; adult shirt fronts usually need 11 x 17 or larger paper.
- A flat heat press. Most adult designs fit a 15 x 15 platen. See our heat press for shirts guide.
- Heat-resistant tape, fresh butcher paper, white cardstock for inside the shirt, and a lint roller.
- Optional: a pressing pillow or foam pad for seams and lightweight fabric.
The full kit is in our sublimation supplies list.
Sublimation shirt settings from press makers
| Source | Temperature | Time | Pressure | Notes |
|---|---|---|---|---|
| Geo Knight press manuals | 400°F (204°C) | 35 sec | Medium | Pre-press 2–4 sec first |
| HTVRONT chart, polyester fabric | 400°F (204°C) | 35–50 sec | Medium | Pre-press 3–5 sec |
| Your shirt or paper supplier | Varies | Varies | Varies | Always takes priority |
These are starting points. Light 4 oz performance tees and thick polyester fleece behave differently, so press one test shirt before a batch. More settings by blank are in our sublimation temperature chart.
How to sublimate a shirt, step by step
- Size the design. Set the artwork to the finished size at 300 dpi or more; our what size sublimation for shirts chart lists sizes by placement. A low-resolution file prints soft no matter how well you press.
- Mirror and print. Turn on mirror (or "reverse") in your print settings and print on the coated side of the sublimation paper, using the paper maker's recommended media setting.
- Let the print dry. Sublimation ink looks dull on paper; that's normal. A damp print blurs, so give it a few minutes.
- Preheat the press to your setting and check pressure with the shirt in place.
- Lint-roll the print area. Cricut calls this a "do not skip" step, because even tiny fibers leave white specks.
- Put cardstock inside the shirt. Cricut uses 80 lb white cardstock inside blanks so dye doesn't pass through to the back.
- Pre-press the shirt. 2–4 seconds per Geo Knight, or 3–5 seconds per HTVRONT, to remove moisture and wrinkles. Moisture turns to steam and blurs the print.
- Place and tape the transfer. Lay the print face-down on the shirt and tape at least two edges with heat-resistant tape. Regular tape melts.
- Cover with fresh butcher paper. Cricut says never to reuse it, because it captures stray dye that can transfer to your next shirt or your heat plate.
- Press. Close the press and don't open it or move the shirt until the timer ends.
- Peel straight up, right away. Lift the press slowly, then lift the paper straight up while hot. Sliding it sideways is a common cause of ghosting.
- Let it cool flat before folding or stacking.
Placement tips
- Center the design by the shirt, not the platen. Fold the shirt in half lengthwise and press for 2 seconds to mark a center crease, then line the transfer up with it.
- Keep collars, seams and hems off the pressing area. They lift the platen and leave pale patches. A pressing pillow under the print area raises it above the bumps.
- Check the press size. Unisub's general advice is that the press should be slightly bigger than the item, because edges get less heat and pressure. If your design runs close to the platen edge, step up a size.
How to sublimate on polyester blends and colored shirts
- 50/50 and triblend shirts: only the polyester takes the dye, so prints look faded or vintage. That can be a style; just don't expect bright color.
- Light colors (heather gray, pastel): sublimation ink is transparent, so the shirt color tints the design. Yellow ink disappears on a yellow shirt.
- Dark or black shirts: standard sublimation won't show. You need a white base layer; our guide to how to sublimate on dark shirts covers the options.
- Cotton: use a sublimation HTV or a coating instead; our cotton spray guide compares the methods.
Common mistakes and fixes
| Problem | Likely cause | Fix |
|---|---|---|
| Faded print | Low polyester content, too little time or pressure | Check the fiber label; add about 10 seconds, per HTVRONT |
| Ghosting (double image) | Paper moved during or after pressing | Tape the transfer; peel straight up |
| Box outline around the print | Platen edge crushed the fabric's sheen | Use a pressing pillow or foam; slightly less pressure |
| Yellowing on white polyester | Too hot, too long, or optical brighteners in the fabric | Lower about 10°F or cut 10–15 seconds, per HTVRONT |
| Dye on the back of the shirt | No barrier inside the shirt | 80 lb white cardstock inside, per Cricut |
| White specks | Lint or fibers on the surface | Lint-roll before every press |
| Blurry edges | Moisture or excess pressure | Pre-press; reduce pressure on thin fabric |
More symptoms and fixes are in our sublimation troubleshooting guide.
How to check a shirt is sublimation-ready
Before you buy a case of blanks, read the fiber label, not the product title. "Sublimation shirt" is a marketing term, and the real test is polyester content.
- 100% polyester: the brightest, most durable result. Performance and athletic tees are usually here.
- 90–95% polyester with spandex: still bright. Cricut's crew-neck blank, for example, is 95% polyester and 5% spandex.
- 50–65% polyester blends: a faded, vintage look by design.
- Under 50% polyester or 100% cotton: not suitable for plain sublimation.
Also check the color name. Some heathered colors are a different blend from the white version of the same shirt, so confirm the fiber content for the exact color you order. Our best shirts for sublimation guide lists fiber content for each pick.
Printing adult shirt fronts on an 8.5-inch printer
Most beginner printers top out at 8.5 inches wide, while a typical adult front design runs 10–12 inches wide. You have three options:
- Design to fit. Chest logos, pocket prints and youth shirts all fit on letter or legal paper.
- Print in two pieces. Split a large design along a natural break and press each half separately. It takes practice to line up and can leave a faint seam, so save it for designs with a gap in the middle.
- Buy large transfers. Order ready-to-press transfers in the size you need and press them on your own blanks. Our guide to making vs buying sublimation transfers covers when that pays off.
If adult fronts are most of your orders, a 13 x 19 printer and a 16 x 20 press are the long-term answer.
Pressing sleeves, pockets and backs
- Sleeves: slide the sleeve over the end of the lower platen, or use a small pressing pad inside the sleeve so the seam sits below the print area.
- Pockets: avoid them. The pocket edge lifts the platen and leaves a pale outline.
- Backs: press the front first and let it cool. Then turn the shirt, put fresh cardstock inside and use new butcher paper, so dye from the first press can't transfer to the second side.
Caring for sublimated shirts
Sublimation dye becomes part of the polyester fiber rather than sitting on top, so a well-pressed shirt won't crack or peel the way vinyl can. Follow the shirt maker's care label, and avoid ironing directly on the design, since high heat can reactivate the dye. Washing inside out with similar colors is a sensible habit for any decorated garment.
FAQ
How long do you sublimate a shirt?
About 35–60 seconds at around 400°F (204°C) for most polyester shirts. Geo Knight's press manuals start at 35 seconds after a 2–4 second pre-press, and HTVRONT's chart gives 35–50 seconds at medium pressure. Your shirt or paper supplier's settings come first.
What temperature do you sublimate a shirt at?
Most press and blank makers start polyester shirts at about 400°F (204°C), with some charts ranging from the high 380s. If you see yellowing on a white shirt, HTVRONT suggests dropping about 10°F or cutting 10–15 seconds.
Do you mirror sublimation on shirts?
Yes, with standard sublimation paper. The printed side faces the shirt, so the design has to be printed in reverse to read correctly. Turn on mirror or reverse in your print settings before every shirt.
Can you sublimate a 50/50 shirt?
You can, but only the polyester half takes the dye, so the print looks faded or vintage by design. Cricut recommends 90% polyester or more for bright results. For full color on cotton or blends, use a sublimation HTV or another method.
Should I put cardstock inside a shirt when sublimating?
Yes. Cricut uses 80 lb white cardstock inside blanks to stop dye from passing through to the back of the shirt. Use butcher paper on top as well, and never reuse either sheet.
Next steps
Choose a blank from our best shirts for sublimation, and if you still need a press, our heat press for shirts guide compares the 15 x 15 and 16 x 20 options most shirt sellers use.