Gloss white
The most vivid colour and depth; the standard for photo panels and art prints.
Printing guide
Sublimation Aluminium Sheet: Blanks, Finishes & How to Print
Sublimation aluminium sheet is aluminium coated with a special polyester layer that accepts dye-sublimation inks under heat and pressure, giving photo-quality, scratch-resistant prints. Plain aluminium cannot be sublimated; the coating is what makes it work. This guide explains the alloys, coatings, thicknesses and press settings, and how to fix common print faults. Metline supplies coated sublimation sheet and cut blanks to print shops and converters worldwide.
- Base alloys
- 1100 · 3003 · 5052
- Thickness
- 0.2 – 2.0 mm
- Finishes
- Gloss, matte, brushed, mirror
- Press
- about 190 – 205 °C, 60 – 90 s
How dye-sublimation on aluminium works
Sublimation inks are printed onto transfer paper with an ordinary inkjet head. In the heat press the dyes turn directly from solid to gas and diffuse into a polymer surface, where they become locked in as the panel cools. The image ends up inside the coating rather than sitting on top, which is why a sublimated panel is so durable.
Dyes only bond to polyester-type polymers. Bare aluminium, anodised aluminium and ordinary paint will not take the image. A sublimation blank is therefore an aluminium sheet with a cured polyester coating, usually applied on a coil-coating line for even thickness, then protected with a peelable film until printing.
Aluminium suits the process well: it is flat and dimensionally stable, it conducts heat quickly so the coating heats evenly, it does not rust outdoors, and it is light enough to hang large photo panels on a single cleat.
Alloys, thickness and sizes
| Alloy | Character | Typical blank |
|---|---|---|
| 1100 / 1050 / 1060 | Soft, very flat, easy to cut and punch | Business cards, name badges, ornaments, thin plaques |
| 3003 | Stronger than 1100 with good formability | Signs, photo panels, nameplates, keychain stock |
| 5052 | Highest strength and best outdoor corrosion resistance | Outdoor signage, large wall panels, licence-plate stock |
| Thickness | Common use | Approx. weight |
|---|---|---|
| 0.20 – 0.30 mm (0.008 – 0.012 in) | Business cards, labels, photo magnets | 0.6 – 0.8 kg/m² |
| 0.45 – 0.65 mm (0.018 – 0.025 in) | Badges, small signs, wall art with a backing | 1.2 – 1.8 kg/m² |
| 1.0 – 1.15 mm (0.040 – 0.045 in) | Photo panels and wall art, mid-size signs | 2.7 – 3.1 kg/m² |
| 1.5 – 2.0 mm (0.063 – 0.080 in) | Rigid signs, outdoor and large-format panels | 4.1 – 5.4 kg/m² |
Weights calculated from a density of about 2.71 g/cm³; the coating adds very little. Common blank sizes include 200 × 300, 300 × 400, 305 × 610 (12 × 24 in), 400 × 600 and 610 × 914 mm (24 × 36 in), with full sheets up to about 1220 × 2440 mm for cutting.
Coatings and surface finishes
Matte or satin white
Reduces glare and reflections; preferred for signs read under bright light and for text-heavy work.
Clear over brushed silver or gold
The metal shows through unprinted areas, giving a metallic look for awards and nameplates. White areas must be printed as a colour, since the press cannot create white.
Clear over mirror
Bright reflective base for decorative effects; shows fingerprints easily.
Pearl, champagne and coloured bases
Tinted coatings for awards, giftware and decorative panels.
Wood-grain and textured
Printed or embossed patterns used for interior decoration and signage.
For outdoor use, ask for a coating rated for exterior UV exposure. Most sublimation dyes fade faster in direct sunlight than inkjet pigments; a UV-stabilised coating and, for long exposure, a protective clear laminate extend colour life considerably.
How to print on sublimation aluminium
- Prepare artworkSet the document to the blank size plus about 2 mm bleed on each edge. Use the printer manufacturer's colour profile for the coating and mirror the image if your workflow requires it.
- Print the transferPrint onto sublimation paper with sublimation ink. Let heavy ink coverage dry briefly to avoid blotching.
- Prepare the blankPeel the protective film, then wipe the coating with a lint-free cloth. Any dust or fingerprint will show as a spot.
- AssemblePlace the paper image-side down on the coating and fix it with heat-resistant tape so it cannot shift. Use a sheet of protective paper above and below.
- PressStart around 190 – 205 °C (375 – 400 °F) for 60 – 90 seconds at medium pressure, coated side facing the heat source as the blank maker recommends. Thicker blanks need the longer end of the range.
- Cool and finishRemove the paper immediately and let the panel cool flat on a level surface to avoid bowing. Drill or attach hangers after cooling.
Always follow the coating supplier's settings: dwell times and temperatures vary between coatings and press types, and a short test on an offcut is the quickest way to confirm them.
Common faults and how to fix them
| Fault | Likely cause | Fix |
|---|---|---|
| Dull or weak colours | Too little heat, time or pressure; wrong colour profile | Raise temperature or dwell slightly, check press calibration, use the correct ICC profile |
| Blurred or ghosted image | Paper moved when the press opened or closed | Tape all edges, lift the press cleanly, remove paper in one movement |
| Yellowed whites | Overheating or too long a dwell | Reduce temperature or time; check thermostat accuracy |
| Spots or specks | Dust or fibres under the paper, moisture in the paper | Clean the blank, store paper dry, pre-press the protective sheet |
| Uneven density | Uneven platen pressure or a cold zone | Use a pressure pad, check the platen with a temperature probe |
| Panel bowed after pressing | Cooled unevenly or handled while hot | Cool flat under light weight; use thicker blanks for large panels |
What sublimation aluminium is used for
- Photo panels and wall art: high-gloss prints with depth and long life indoors
- Signage: wayfinding, office and room signs, menu boards and indicator plates
- Awards and identification: plaques, nameplates, badges, medals and asset tags
- Promotional items: converters cut sheet into business cards, magnets, keychain and tag blanks
- Interior decoration: printed wall panels, lift interiors and furniture inlays
Metline supplies the coated aluminium sheet and cut blanks; finished printed products such as tags, magnets or tumblers are made by printers and converters.
What drives quality and cost
- Coating type and thickness, and whether it is rated for outdoor use
- Surface base: brushed and mirror bases cost more than plain white
- Alloy and thickness: 5052 and thicker gauges cost more per piece
- Cutting: rounded corners, custom shapes and pre-drilled holes add processing
- Packing: interleaving and film protection to prevent scratches in transit
Common mistakes include using uncoated or anodised aluminium, choosing too thin a sheet for large panels (it flexes and bows), and ordering a clear-coat metallic blank for artwork that needs bright whites.
References and standards
- ASTM B209 – Aluminum and Aluminum-Alloy Sheet and Plate
- EN 1396 – Coil coated sheet and strip for general applications
- EN 485-2 – Aluminium sheet, strip and plate: mechanical properties
- Penn State Maker Commons – Dye sublimation
Sublimation aluminium (aluminum) sheet: FAQ
Can you sublimate on plain aluminium?
No. Sublimation dyes only bond to polyester-type coatings. Plain, anodised or painted aluminium will not hold the image; you need sheet with a sublimation coating.
What temperature and time are used for aluminium sublimation?
A common starting point is about 200 °C (400 °F) for 60 – 90 seconds at medium pressure. Thin blanks need less time; thick panels and some coatings need more. Always test with the coating supplier's settings.
What thickness of aluminium is best for photo panels?
Around 1.0 – 1.15 mm (0.040 – 0.045 in) is typical for wall photo panels; it stays flat and rigid. Use 0.2 – 0.3 mm for cards and 1.5 mm or more for large or outdoor signs.
Are sublimated aluminium prints suitable outdoors?
Yes, with an exterior-rated coating, but dye colours fade faster in direct sun than indoors. For long outdoor life use a UV-stable coating and consider a clear protective laminate.
Why are whites missing on my brushed silver blank?
Clear-coated metallic blanks have no white layer, and sublimation cannot print white. Unprinted areas show the metal. Use a white-coated blank if the design needs white.
Can sublimation blanks be cut to custom sizes?
Yes. Sheets can be guillotined, punched or CNC-cut, with square or rounded corners and drilled holes, before printing.
Looking for sublimation aluminium blanks?
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