How to Sublimate License Plates: Time, Temperature and Pressure Guide

Sublimated aluminum plates are one of the best products to learn on: the blanks are cheap, the print is forgiving, and a finished plate looks like a real product the first time you get it right. We have pressed well over 100,000 of them in our Phoenix shop. This is the process, the settings, and the mistakes we made so you don’t have to.

What you need

• Sublimation printer with sublimation ink (Epson SureColor F170/F570, Sawgrass SG500/SG1000, or a converted EcoTank). See our equipment guide.
• Sublimation paper (A-Sub or TexPrint work well for hard goods).
• Heat press with a flat platen at least 12″ wide for 6×12 plates. A 15×15 clamshell works; a swing-away is nicer for hard goods.
• Sublimation-coated aluminum plate blanks, gloss white, 0.025″. Not just any aluminum; it must be polyester coated. We sell the blanks we use.
• Heat-resistant tape, butcher paper (unwaxed), heat gloves, and a lint-free cloth.

Step 1: Print

Design at the plate’s full size plus 1/8″ bleed on every side (6.25 x 12.25″ for a 6×12). Mirror the image. Print on the coated side of the paper at the highest quality setting using your printer’s sublimation ICC profile. Let the print dry for a minute; wet ink transfers unevenly.

Step 2: Prep the blank

Peel the protective film. Wipe the plate with a lint-free cloth (a little isopropyl if there are fingerprints). Any speck of dust becomes a white dot in the print.

Step 3: Tape

Lay the print face down on the plate, centered with even bleed. Tape two short pieces on the back edges, not across the front. If the paper can shift even slightly you will get ghosting (a faint doubled image). Tape only where the plate has no print you care about, because tape edges can leave a faint pressure line on some coatings.

Step 4: Press

Our starting point for gloss aluminum plates:

Setting	Value
Temperature	400°F (204°C)
Time	60-75 seconds
Pressure	Medium (firm, not straining)
Orientation	Plate face up, paper on top, butcher paper over everything

Every press reads a little different. Start at 60 seconds and adjust in 5-second steps. When the timer ends, open the press quickly and lift the paper straight up in one motion with gloves on. Do not slide it.

Step 5: Cool

Set the plate on a cooling rack or a clean towel face up. The print is fully set when the plate is at room temperature. Do not stack hot plates; they will mark each other.

Troubleshooting

• Faint “watermark” or cloudy haze: too much time or too much heat. Cut 5 seconds and try again. This is the most common plate problem.
• Ghosting / double image: paper moved. Tape better, open the press faster, lift straight up.
• Dull colors: not enough time or temperature, or the paper printed on the wrong side. Also check your ICC profile; sublimation ink looks dull on paper and blooms with heat.
• Uneven transfer, one edge light: pressure is uneven. Check that the platen is level and add a thin silicone pad under the plate.
• Yellowing on white areas: too hot for the coating. Drop to 385°F and add time.
• White dots: dust or lint. Wipe the blank and change your butcher paper often.
• Line at the tape edge: the pressure differential at the tape edge. Tape on the back, or use a lower-tack tape.

UV protected plates

For plates that will live on the front of a car in full sun, add a UV-blocking clear coat after pressing (a spray automotive clear works, or a dedicated sublimation UV laminate). It roughly doubles fade life. Let it cure fully before packaging.

Mini plates (4×7 and 3×6)

Same settings, same process. Small plates press well in batches; you can nest several under one sheet of butcher paper if your press is large enough and the pressure is even. Trim the transfer sheets between plates so the paper doesn’t bridge and wrinkle.

Prefer to skip the equipment? We’ll print it for you, shipped in 1-3 days. Want to do it yourself? The Sublimation Center has the blanks, the settings and the videos.