Sending an artwork file off to a commercial printer can feel like stepping onto a stage or launching a campaign into the unknown. Once the file hits the print queue and plates are made, there is no turning back. If a telephone number is missing a digit, an image is pixelated, or crucial text sits too close to the trim line, the mistake becomes permanent on thousands of printed brochures, cards, or banners.
Many online “click-to-basket” printing portals operate on automated assembly lines. Their systems process whatever digital file you upload, print it without a second glance, and post it to your door. When the box arrives with cropped logos or muddy colours, you are left with wasted budgets, lost time, and unnecessary embarrassment.
At Print Lord, we believe every piece of print is mission-critical. We guard your brand as if it were our own crest. Decades of working at the coalface of commercial printing have taught us that a systematic pre-flight check prevents virtually every common artwork disaster.
Whether you are designing in Adobe InDesign, Illustrator, or Canva, run your artwork through this comprehensive 10-point pre-flight checklist before hitting send on your next print order.
1. Confirm Accurate Document Dimensions and Safety Margins
Before placing a single graphic or headline on your digital canvas, verify that your document dimensions match your target print size exactly. An A4 brochure must measure precisely 210mm by 297mm, while a standard UK business card measures 85mm by 55mm.
Equally important is establishing a clean safety margin (also known as the quiet zone). Position all critical text, logos, and contact details at least 3mm to 5mm inside the final trim line. Physical cutting guillotines process thousands of sheets at high speeds, and minute natural shifts can occur. Keeping important elements well inside the quiet zone ensures that no letters or essential iconography ever get sliced off.
2. Set the Essential 3mm Bleed Allowance
Bleed is the single most common artwork area where artwork files fail pre-flight inspection. If your design features background colours, photography, or decorative patterns that touch the edge of the finished page, those elements must extend past the trim boundary into what printers call the bleed zone.
For standard commercial print in the UK, a 3mm bleed allowance on all four edges is mandatory. When paper sheets are trimmed after printing, the guillotine cuts directly through this extra 3mm region. Without bleed, tiny millimetre-level variations in cutting will leave unsightly white hairline edges around your finished materials.
3. Verify 300 DPI High-Resolution Image Quality
Screen displays and smartphones present imagery using glowing pixels at relatively low density. What looks crisp on a desktop screen at 72 or 96 dots per inch (DPI) can look fuzzy, grainy, or severely pixelated when transferred onto paper.
Ensure every photograph, illustration, and raster graphic included in your layout is set to at least 300 DPI at 100% of its final printed size. If you enlarge a small 300 DPI thumbnail image to fit a full-page A4 flyer, its effective resolution drops drastically. Always inspect image resolution within your design software’s pre-flight or links panel before exporting.
4. Convert RGB and Spot Colours to CMYK
Digital screens generate colours using light in RGB mode (Red, Green, Blue). Commercial printing presses, however, apply physical inks to paper using CMYK mode (Cyan, Magenta, Yellow, and Key/Black).
Because the screen colour spectrum is wider than the printable ink spectrum, vibrant electric blues, neon greens, and ultra-bright pinks created in RGB cannot be reproduced identically with standard inks. Always convert your document artwork and linked images to CMYK before sending files to press. Reviewing colour values in CMYK mode prevents unexpected, disappointing colour shifts when the final printed job arrives.
5. Outline Fonts and Embed Typefaces
When a printer opens an artwork file that relies on live fonts, their computer software must possess those exact same font files installed. If a typeface is missing, layout software automatically substitutes a generic system font, completely destroying your carefully crafted typography, brand consistency, and spacing.
To prevent font substitution glitches, convert all live text to outlines (also referred to as creating curves or paths) in software like Adobe Illustrator or InDesign. Alternatively, ensure all typefaces are fully embedded when exporting high-resolution print PDFs. Outlining text turns letters into permanent vector shapes, ensuring your headlines look identical on every screen and press worldwide.
6. Check Total Ink Coverage and Master Rich Black Settings
Applying too much physical ink to paper causes heavy saturation, smudging, long drying times, and paper distortion. In commercial printing, total ink density (or Total Ink Limit) should generally never exceed 300% across Cyan, Magenta, Yellow, and Black values combined.
Furthermore, pay close attention to how you apply black ink. For small body text, always use 100% Key/Black alone (0C 0M 0Y 100K) to keep fine lettering crisp and sharp. For large, solid black backgrounds or thick headers, standard 100% black can look washed out or dark grey. Instead, use a Rich Black formula (such as 30C 20M 20Y 100K) to achieve a deep, regal, velvety black finish without overloading the paper stock.
7. Align Fold Lines, Creases, and Panel Widths
Folded print projects, such as tri-fold menus, gatefold brochures, or roll-folded leaflets, require precise mathematical planning. A common mistake is dividing a tri-fold A4 sheet into three equal panels of 99mm each. In reality, the inside panel that folds inward first must be 2mm to 3mm narrower (e.g. 97mm) so that the document lays completely flat without buckling or bowing.
Always double-check fold positions, perforation lines, and crease marks on your digital proof. Ensuring panel widths accommodate paper thickness guarantees that folded literature closes cleanly and presents your content in exact sequence.
8. Flatten Transparency and Audit Overprint Settings
Modern graphic design tools make it easy to apply drop shadows, gradients, opacity blends, and layer effects. However, complex unflattened transparencies can cause unexpected dark blocks, missing elements, or odd box artifacts when processed by commercial print raster image processors (RIPs).
Flatten complex transparency layers during PDF export using high-resolution transparency presets. Additionally, audit your overprint settings carefully. Accidental overprint settings can cause white text set to overprint on a dark background to completely disappear once physical ink hits the sheet.
9. Export to Commercial PDF/X Standards
Word documents, JPEG images, or raw design files should not be sent directly to press unless specifically requested. The gold standard file format for commercial print production is a high-resolution, print-ready PDF, specifically PDF/X-1a or PDF/X-4.
Exporting to PDF/X standards automatically locks in high-resolution settings, embeds fonts, enforces CMYK colour conversion, and includes trim and bleed marks in precise registration. When downloading artwork from online design platforms such as Canva, always choose PDF Print with crop marks and bleed enabled, selecting CMYK colour space where available.
10. Conduct Meticulous Proofreading and Live QR Testing
The final step in your pre-flight routine is thorough, old-fashioned proofreading. Never rely solely on automated spellcheckers. Print out a physical draft copy at 100% scale on your desktop printer, grab a pen, and read through every line of copy, header, price tag, and contact detail.
Read phone numbers out loud, type website URLs directly into a web browser, and scan every QR code on the page using a physical smartphone screen. Checking that digital links point to live landing pages before committing to a full print run saves costly reprints and protects your hard-earned reputation.
Print Lord: Your Partner in Flawless Artwork
Preparing print-ready artwork does not have to be stressful or confusing. While running through this 10-point pre-flight checklist eliminates the overwhelming majority of common artwork headaches, you never have to navigate the process alone.
Unlike faceless web portals that take your money and print faulty files without a second thought, Print Lord operates as your trusted advisor and brand ally. From artwork health checks and Canva rescue missions to bespoke paper stock guidance and custom commercial finishes, we make sure your marketing materials arrive on brand, on time, and finished to the highest royal standard.
When your brand reputation is on the line, leave nothing to guesswork. Run your pre-flight checks, consult the experts, and let us deliver print results you can be truly proud of.
Print Lord. At your service. On brand. On time.