What Is Large Format Printing?
Large format printing (also called wide format printing) refers to printing on substrates wider than the standard sheet fed press can handle — typically anything wider than 457mm (18 inches). It covers a massive range of applications: from roller banners and trade show displays to building wraps and vehicle graphics.
Common Large Format Print Applications
- Roller/pull-up banners: Portable display stands used at events, exhibitions, and retail.
- PVC banners: Outdoor advertising, events, scaffolding signage.
- Foam board and Foamex: Rigid indoor signs, point-of-sale displays, wayfinding.
- Dibond (aluminium composite): Durable outdoor signs, estate agent boards, shop fascias.
- Canvas prints: Art reproduction, hospitality, and interior décor.
- Vehicle graphics and wraps: Fleet branding, promotional vehicles.
- Window graphics: Frosted film, perforated vinyl, full-colour window decals.
- Trade show displays: Pop-up fabric displays, modular exhibition stands.
Understanding Resolution for Large Format
One of the most confusing aspects of large format printing is the resolution requirement. Unlike small format print (which requires 300 DPI), large format can work at lower resolutions because the output is viewed from a greater distance.
- 100–150 DPI at final size: Suitable for most large format applications viewed at 1–3 metres.
- 72–100 DPI at final size: Acceptable for building wraps and billboards viewed from far away.
- 300 DPI at final size: Only necessary for close-up examination (e.g., window graphics, counter displays).
Important: Always specify DPI at the final output size, not at the design file size. A file designed at 100% size at 100 DPI is very different from one designed at 25% size at 300 DPI (which would be 75 DPI when scaled up).
File Setup and Preparation Tips
Work at a Reduced Scale
Designing a 3-metre-wide banner at 100% size creates enormous files. Instead, design at 1:10 scale (e.g., 300mm wide = 3m output) at 100 DPI. This gives you 100 DPI at the final output size without unmanageable file sizes.
Bleed Requirements
Large format items require more bleed than standard print:
- Banners with hemming and eyelets: 15–30mm bleed all round.
- Rigid boards (Foamex, Dibond): 5–10mm bleed.
- Always confirm bleed requirements with your specific printer.
Colour Mode
Use CMYK colour mode for all large format work. Some large format printers (particularly those using UV-curable or solvent inks) may have specific colour profiles — ask your printer for an ICC profile if critical colour accuracy is required.
Choosing the Right Material
| Material | Best Use | Indoor/Outdoor |
|---|---|---|
| PVC Banner | Events, scaffolding, fencing | Both |
| Foamex (PVC foam) | Point-of-sale, lightweight signs | Indoor |
| Dibond | Permanent outdoor signage | Outdoor |
| Self-adhesive vinyl | Wall graphics, vehicle decals | Both |
| Fabric (tension frame) | Exhibition displays, interiors | Indoor |
| Canvas | Art prints, hospitality décor | Indoor |
Finishing Options for Large Format
- Lamination: Gloss, matt, or satin — protects against UV, scratching, and moisture.
- Eyelets/grommets: Reinforced holes for hanging banners outdoors.
- Hemming: Stitched or welded edge to prevent tearing on PVC banners.
- Mounting: Foam board, aluminium rails, or snap frames for rigid displays.
Getting the Best Results
The key to great large format print output is good communication with your printer. Share intended viewing distance, environmental conditions (indoor vs. outdoor), and any specific colour accuracy requirements before you finalise your file setup. A good print partner will guide you through their preferred specifications and flag any issues with your artwork before going to press.