We offer Risograph printing up to A3 and Giclée printing up to A1

Please contact hey@jumbo-press.com for more info.

Colours

Below is a list of the colours we currently stock at Jumbo, including their Hex codes for your specific project needs. If you're looking for a colour that's not listed, please feel free to get in touch—we may have recently added it to our collection.

All our colours are translucent, allowing you to mix them to create secondary shades. For assistance with setup or usage, please refer to the guide below.

Risograph Print guide
Format and margin
  • Max sheet size: 297 × 420 mm (A3)
  • Max image area: 287 × 410 mm
  • Safe margins: At least 5 mm all around (10 mm for dense ink areas)

Avoid full-bleed elements right to the edge — ink can easily smudge during handling or printing.
Colour & Coverage
  • Colours blend — each pass is transparent; overlapping inks create new tones
  • Avoid dense fills at 100% — try to use 80–90% opacity for large colour areas
  • Flat colours may print unevenly — this is typical with big blocks of ink
  • Avoid fine lines in overprints — don’t stack text or lines across layers
Text & Line Guidelines
  • Minimum font size: 6 pt
  • Avoid very thin fonts or line weights under 0.25 pt
  • For small type: use solid black only, not layered inks
Paper

We print exclusively on uncoated paper, suitable for Risograph printing.

  • Weight range: 80g to 300g
  • FSC-certified stock – sustainably sourced
  • We frequently work withFedrigoni papers from Italy, as well as a selection oflocally sourced papers from Barcelona. 
  • You’re welcome to provide your own paper (please bring extra for setup)
Preparing Your Files
  • Submit one flattened, grayscale or black & white PDF per colour layer
  • For prints, a psd with colours layers is accepted for A3 prints
  • 300 dpi resolution required
  • Include a colour reference preview (RGB or CMYK OK)
Print Production Notes
  • Minimum run: 30 copies
  • Riso is a duplicator, not a printer — each layer is printed via a stencil and drum
  • Expect imperfections — slight shifts, texture, and roller marks are part of the medium
  • Inks are oil-based and slow-drying (especially in multi-layer prints)
  • Printing with more than two colours requires multiple passes, which may result in slight misalignments or marks.
    At Jumbo, we apply our experience and care to ensure the cleanest and most precise result possible.

Giclée print guide
About Giclée Printing

Giclée is a professional fine art printing process using archival pigment inks and museum-grade paper. It produces vibrant, long-lasting prints that faithfully reproduce your artwork’s colors and details.

At Jumbo Press, we print on Hahnemühle Photo Matt Fibre 200 gsm, ensuring your prints are museum-quality and durable.
File Requirements

To get the best results, please provide:

  • 300 dpi at final print size
  • Adobe RGB (1998) or ProPhoto RGB
  • TIFF or high-quality JPEG (uncompressed or minimal compression)
  • Exact dimensions you want printed (A4, A3, A2, A1, or custom)
  • Leave 5–10 mm around the edges for trimming
Print Sizes

We can print standard and custom sizes:

Size Dimensions

  • A4 (21 × 29.7 cm)
  • A3 (29.7 × 42 cm)
  • A2 (42 × 59.4 cm)
  • A1 (59.4 × 84.1 cm)

Custom sizes are available — contact us for guidance.
Tips for Best Results
  • Label your files clearly with your name and size to avoid mix-ups.
  • For mixed media or unusual colors, consider a test print first.
  • Ensure files are high-resolution and color-corrected.