Some projects are remembered for their technical complexity. Others, for what they represent. On January 29, 2026, at Somorrostro Beach (Barcelona), a large-format banner featuring the portrait of Hind Rajab was unfolded as part of an action promoted by Avaaz to amplify a message about protecting children in conflict contexts.

Seen from the air, the image was striking in scale: a piece of approximately 55 metres long and close to 1,000 m² in surface area. At Marc Martí, we were responsible for the production of the banner—a job where “large format” stops being a size and becomes a commitment: to the final result, to safe handling and deployment, and to image fidelity.

A Giant Banner Is Not Just “Printing Big”

In giant banner printing—especially when you’re working with tens of metres—the challenge goes far beyond whether the printer can output the dimensions. What matters is that, when the real moment arrives—the deployment—everything works:

  • That the image reads clearly from far away and from above, with definition and contrast.
  • That the material performs outdoors (wind, humidity, friction, handling).
  • That hems and reinforcements withstand tension, movement and overall weight.
  • That deployment is feasible thanks to technical preparation designed for real-world installation.

That’s why, when we produce large-format advertising banners or special large-surface pieces, we approach them with a project mindset: it’s not “a banner”, it’s a piece that must do a specific job—and do it with no room for error.

Key Technical Considerations in Large-Surface Banner Production

Without going into confidential details, projects of this type typically require a set of technical decisions that make all the difference:

1) Choosing the right substrate and outdoor performance

Outdoor banner printing requires selecting a substrate that maintains dimensional stability, strength and high-quality reproduction. At extreme scale, it also matters how the material behaves during handling and unfolding.

2) Definition and colour consistency at scale

When an image will be viewed from a distance (or from the air), file preparation and colour consistency become even more important: contrast, blacks, skin tones, smooth gradients and overall readability.

3) Seams, reinforcements and finishing

At this size, finishing isn’t an add-on—it’s part of the project’s engineering. Correct reinforcements and finishing help distribute tension and enable controlled deployment.

4) Deployment-ready preparation

Production doesn’t end when printing does. Preparing a banner of this size means making it deployment-ready: planned folding/tensioning, safe handling and a final result with no visual surprises.

Why Large Format Has Such Impact (and Why It Works)

Large format has something unique: it interrupts visual routine. A giant banner in a public space transforms the environment into a communication medium. And when the message is sensitive, scale can also create silence, pause and attention.

For our team, being part of projects like this is a reminder of something essential: printing communicates. Sometimes to sell. Sometimes to guide. And, occasionally, to support a message that calls for humanity.

Banner Printing in Barcelona: What We Do at Marc Martí

At Marc Martí we produce large-format banners for campaigns, events and special actions. We advise on substrates and finishes depending on use (indoor/outdoor), exposure time and the required level of impact.

  • Advertising banners for façades, fencing and urban spaces
  • Hanging banners and textile/PVC banners for events and activations
  • Large-surface pieces and special formats (extreme sizes)
  • Finishing: reinforcements, hems and installation-ready preparation

FAQ: Giant Banner Printing

How big can a giant banner be?

It depends on the use case and installation system. Technically, very large surface pieces can be produced—but the key is planning substrate, reinforcements, finishing and deployment to ensure a safe and stable result.

What’s the difference between a standard banner and a large outdoor banner?

The difference lies in material behaviour and finishing. At large scale, the banner must better resist tension and handling, and finishing is often decisive for correct unfolding and fixing.

How do you ensure image quality on a huge banner?

Through a combination of file preparation, colour consistency and production control. For large pieces, work also focuses on ensuring the image “reads well” at a distance (contrast, detail and overall balance).

Need large-format banner printing in Barcelona?
Tell us about your project and we’ll advise you on materials, finishing and deployment-ready preparation. On special projects, the difference is in planning before printing.