Outdoor Aluminium and ACP Printing in the UAE: What to Specify Before You Order
For signage companies, fit-out contractors and brand teams with printed panels going outside: what we need to know about the panel, the site and the cleaning, and how we test before a run.
Outdoor aluminium and ACP printing works when the panel's finish, the site and the cleaning are known before printing, and a sample has been tested against them. On ACP and coated aluminium the ink bonds to the paint, not the metal. On bare and anodised sheet it bonds to a surface we prepare. UAE sun and heat fade colour and work on that bond over time, so we test a sample and do not quote a lifespan in years.
At a glance:
- For: signage companies, fit-out contractors, developers and brand teams.
- Panels: ACP, powder-coated, painted, anodised and bare aluminium.
- Size: panels up to 2.5 metres wide on our belt flatbed.
- You supply: panels already routed, cut and folded, with the protective film on.
- Sample: AED 105 or AED 150 depending on what it is, taken off the invoice if you go ahead.
- Not claimed: a lifespan in years, weatherproof or UV-proof print.
Our ACP panel printing and metal and aluminium printing pages describe the services. This guide covers what changes when the panel is going outside.
Start with the panel finish
"Aluminium" can mean five different print surfaces, and the finish decides how the print bonds. An aluminium composite panel is two thin aluminium skins over a core with a factory-applied paint on the face, as 3A Composites, for example, describes its panels. So on ACP we print that paint, never bare metal.
| Panel finish | Tell us | What we do |
|---|---|---|
| ACP or ACM | The brand, the coating (PVDF, FEVE or polyester), the colour and the gloss | Print the coated face, after testing that coating |
| Powder-coated or painted aluminium | The coating supplier, its class if specified, the colour | Print the coating, after testing it as supplied |
| Anodised aluminium | The finish and, if you know it, whether it is sealed | Test a piece from the batch |
| Bare or brushed sheet | The alloy if known and how it was cut | Degrease, and use an adhesion promoter where the test calls for it |
For how bare, anodised and powder-coated metal compare as print surfaces, read which metal finish takes UV ink. Fluoropolymer faces such as PVDF and FEVE are made to shed dirt and resist weather, which is exactly why they are worth testing before a large run. PRO TECHnology, our sister company in the same Dubai group, explains the coating chemistry and the test standards behind these checks in its technical guide to aluminium and ACP adhesion and outdoor durability, including why a primer helps the bond but cannot stop fading.
Where will the panels live?
The site changes the build, so tell us about it before we quote:
- Which way it faces, and whether it takes direct sun for most of the day or sits in shade.
- Near the sea or inland. Coastal sites add salt and humidity.
- Fully outside or sheltered: a car park, a covered walkway or an atrium under a skylight each behave differently from an open facade.
- How long it needs to last: hoarding for a few months is a different brief from permanent cladding.
- Height and access: panels nobody can reach are hard to clean and to replace.
Those answers decide whether white goes under the colour, whether a clear coat is worth adding, and which colours to favour, because some pigments fade faster than others.
Handling, from your workshop to our press and back
- Keep the protective film on until the panels reach us. We remove it at the press. Panels stored uncovered collect dust and scuffs that show through the print.
- Fabricate first. Rout, cut and fold before printing. Folding a printed panel strains the ink at the fold, which is where it cracks. If routing after printing cannot be avoided, tell us so the artwork allows for the cut line.
- Store them flat with interleaving where you can. Panels left leaning against a wall for long can bow.
- Number the panels in installation order when one artwork runs across several, as on our gradient and raised ACP panels.
- Install with gloves, and keep fixings, sealant and drilling swarf off the printed face.
We print panels; we do not fabricate them or install cladding. We can source ACP for a job we are printing, quoted as its own line.
Cleaning: how will the panels be washed?
Facade and sign cleaning is usually done by a contractor with their own chemicals and equipment, and that matters as much as the sun. Panel makers publish their own advice: the cleaning guide for ALPOLIC panels with a Lumiflon finish recommends a mild detergent or a weak isopropyl alcohol solution, and testing anything stronger on a hidden spot first.
A cleaner the panel coating tolerates may still attack printed ink. So tell us what the cleaning contractor uses, and we test it on a printed offcut. As a general rule, a soft cloth or sponge with a mild detergent, no abrasive pads, and no solvents unless they have been tested on the print.
Sun, heat and what fades
Strong sun fades printed colour over time, and how fast depends mainly on the pigments in the ink, as Fujifilm explains for its own inks. Heat adds daily expansion and contraction of the panel, which works on the bond, and dark colours run hotter than light ones in the same sun.
A clear coat over the print can slow wear and fading, but it has to suit the ink and the cleaning, and it weathers too. Mimaki, a maker of UV printers, says hard UV inks have little weather resistance on their own and that any overcoat has to be tested. We decide on a clear coat per job and test it on the sample.
Accelerated weathering tests compare materials, but Q-Lab, which makes the test chambers, says there is no fixed conversion from test hours to years outdoors. That is why we do not quote a lifespan, and why how long UV printing lasts depends on more than the ink.
The sample test before a large order
- Send an offcut or a spare panel from the same batch as the run.
- We print the real build: white base, colour and any clear coat, with the settings recorded.
- We test adhesion with a cross-cut tape test, as in ISO 2409, after the print has rested.
- We test your cleaning method on the printed sample.
- Keep a retained sample on site, facing the same way as the panels, and an identical one indoors to compare against.
A sample is charged at AED 105 or AED 150, depending on what it is, and the fee comes off the invoice if you go ahead. It is usually ready in one to three working days once the artwork is approved. For a large or unusual piece, we confirm the fee and the time first.
What we print, and what stays with you
We print the panel face in our studio in Al Quoz: full ACP sheets on the IQDEMY EVO 2500, a belt flatbed 2.5 metres wide with no machine limit on length, and smaller panels, plates and badges on our Direct Color Systems UV84 (a 4 x 8 ft bed) and UV44 (130 x 130 cm). Gradients, white and raised detail are all possible on the coated face. See the printer fleet. Sun Studio belongs to the same Dubai group as PRO TECHnology, which distributes these machines in the Middle East, so read our view of them with that in mind.
Fabrication, installation and the structure behind the panels stay with you or your contractor. For signage that needs braille or a full sign schedule, our wayfinding signage guide covers what to specify. For bare metal effects indoors, read how the metal shows through.
Common questions
How long will a printed ACP sign last outdoors in Dubai?
Do you clear coat outdoor panels?
Can you print on powder-coated aluminium?
Can a printed ACP panel be bent or routed afterwards?
Do you install the panels?
Is direct printing better than vinyl on outdoor ACP?
Send the panel make and coating, the sizes and quantity, where the panels will be installed and how they will be cleaned, by WhatsApp or phone on +971 4 346 7422, or by email to info@sunstudio.ae. Sun Studio Dubai has been printing in Al Quoz First since 2011. We will tell you what the sample should prove before the run.