The last look before a flyer goes to press is rarely glamorous. It is a quiet pass through measurements, links, and export menus while everyone else is ready to hit send. That pass is where costly mistakes are caught: a logo that looked sharp on screen but prints soft, a headline too close to the trim, a dark background built in RGB that turns muddy on paper.

Use this routine as a preflight habit, not a last-minute panic. Work through it in order, keep the printer’s job notes nearby, and leave enough time to fix a problem rather than debating whether it will be fine. A flyer that has been checked methodically is not only more likely to print cleanly; it is also easier for the printer to process, which reduces the chance of delays and awkward email threads.

The 15-Point Preflight at a Glance

Start with the list, then check the details in the sections that follow. The printer’s template and written requirements override any general default.

1. Trim size and orientation match the printer’s template.
2. Bleed is set correctly and artwork extends into it.
3. Safe margins keep text and key elements away from the trim.
4. Fold or panel layout uses the correct panel widths.
5. Trim marks and other printer marks are included only as requested.
6. Image resolution is adequate at final placed size.
7. Images and graphics are embedded, linked correctly, or supplied separately.
8. Colour mode is CMYK for process printing, with spot colours handled deliberately.
9. Black text and black areas are built for print, not screen.
10. Total ink coverage stays within the printer’s stated limit.
11. Fonts are embedded or outlined according to the printer’s preference.
12. Text and contact details are proofread at full size.
13. QR codes and small marks are high-contrast, well sized, and tested.
14. Pages and artwork order are correct for both sides of the flyer.
15. Export settings produce the requested PDF, then a proof is checked at 100%.

Measure the Page Before You Admire the Design

A flyer can look beautiful on a monitor and still be set up for the wrong piece of paper. Confirm the finished trim size, orientation, and whether the flyer is flat, folded, or part of a set. An A5 portrait flyer is not the same as an A5 landscape flyer, and a three-panel roll fold is not three equal panels.

Write down the finished size and compare it with the printer’s template before moving anything else. If the template says 148 × 210 mm with 3 mm bleed, do not quietly use 2 mm because the design still looks fine on screen. Small differences at this stage become visible cuts, cramped edges, or reprints later.

Trim, bleed, and safe area

Trim is the line the guillotine follows. Bleed is the extra artwork beyond that line, usually a few millimetres, which stops a sliver of white appearing if the cut drifts. Safe area is the zone inside the trim where important text should sit. Use the printer’s figures rather than guessing. If a background colour or photo reaches the edge, it must extend into the bleed. A white border is a design choice, not a substitute for bleed.

A simple example helps: if the flyer has a blue band along the bottom edge, the blue must continue past the trim line into the bleed. If it stops exactly at the trim, a minor cutting shift can leave a thin white line along the finished edge. Keep the headline, logo, address, and other essential elements inside the safe area, where small shifts in trimming will not clip them.

Folds, panels, and page order

Folded flyers add a trap for the unwary. Check panel widths against the printer’s template. On a roll fold, the panel that tucks inside is often slightly narrower so the fold closes cleanly. Content that crosses a fold needs space; a phone number printed across a crease is a nuisance to read. Avoid placing important details within a few millimetres of a fold line unless you have checked a mock-up.

Trim marks help the printer but do not belong inside the artwork. Keep them outside the trim area, and add registration marks or colour bars only if requested. For a two-sided flyer, supply the front and back as separate pages in the correct order. Name the file clearly, for example autumn-open-day_A5_front-back.pdf, so nobody has to open it to discover which side is which.

Check Images at Their Final Size

The resolution question is not “is this image 300 ppi?” It is “is it 300 ppi at the size it appears on the flyer?” A photo that is generous in a thumbnail may be thin when stretched across half the page. Check effective resolution after scaling. If a placed image has been enlarged far beyond its native size, replace it rather than hoping the press will hide the softness.

A rough calculation is useful: an image that is 600 pixels wide, placed 2 inches wide, gives about 300 ppi. Stretch that same image to 6 inches wide and it drops to about 100 ppi. For detailed photographs, that difference is usually visible as softness. For simple graphics, the acceptable figure may differ, but the principle is the same: judge the image at its final placed size, not in isolation.

Logos and line art are usually better as vectors. Screenshots, images pulled from a website, and pictures saved from social media are common weak points. Check that linked images are not missing, that transparency is handled according to the printer’s guidance, and that any image supplied separately has a clear filename. If the printer asks for a packaged folder, include fonts and links as instructed.

Treat Colour as Ink, Not Light

Screens mix light; printing lays down ink. That difference is why a vivid screen blue can print duller, and why a deep screen black can turn into a flat grey. For standard process printing, build the flyer in CMYK and check it in a print-oriented proof, ideally using the printer’s profile or a calibrated soft proof. Do not judge final colour from an uncalibrated office monitor.

Spot colours need a deliberate decision. If the design uses a brand spot colour, confirm whether the printer supports it and whether the job will actually be printed with that ink or converted to process. A spot colour that is silently converted to CMYK can shift, especially in bright oranges, greens, and deep blues. If the printer asks for spot colours to be listed clearly, name them consistently and avoid nearly identical swatches.

Black text, rich black, and total ink

Small black text is usually safest as 100% black only. Building small type from several inks can cause registration problems and fuzzy edges. Large solid black areas are different; a rich black can look deeper, but use the printer’s recommended build rather than inventing one. Total ink coverage matters too. The printer may specify a limit for the stock, often lower for uncoated paper. Over-limit shadows and dark backgrounds can set off, scuff, or dry poorly. The stated limit overrides any general default.

Check Type, Links, and Small Details

Fonts should be embedded or outlined according to the printer’s preference. If text is outlined, keep an editable copy of the source file so a late correction does not mean rebuilding the flyer. Proofread the flyer at full size, not at fit-to-screen. Check phone numbers, web addresses, dates, prices, and venue details one by one. Read the copy aloud or have someone else check it; the same typo can survive multiple passes when you know what it is supposed to say.

QR codes deserve their own check. Give them enough quiet space, keep them high-contrast, and avoid placing them over busy photographs. Print a test proof and scan the code with more than one phone. A code that works on screen can fail on paper if it is too small or printed with insufficient contrast. The same care applies to small icons, social handles, and legal text.

Export, Then Proof at 100%

Export settings are part of the design, not an afterthought. Use the PDF preset the printer requests, include bleed, and add trim marks only as instructed. Check the exported PDF rather than trusting the source file. Open it fresh, confirm the page count and order, and look for missing images or substituted fonts. If the printer provides a preflight report, read it instead of dismissing warnings.

Finally, print a plain-paper proof at 100% and check it with the printer’s notes nearby. Confirm that the front and back are in the correct order, that the fold positions make sense, and that the file name matches the job. Keep the source file and a copy of the final PDF together so a future correction does not start from a mystery file.

Questions Worth Asking Before Upload

A short email before upload can prevent most preflight surprises. Ask only what the job notes do not already answer, and keep the replies with the job file.

• Bleed and safe margin: what exact figures should I use for this trim size?
• Colour: which CMYK profile and total ink limit apply to this stock?
• Folds: is there a panel template, especially for roll folds or nested panels?
• Output: which PDF preset do you prefer, and should I include marks?
• Proofing: do you provide a digital proof, a hard-copy proof, or both?

A Final Two-Minute Check

Before sending, do one last pass that ignores design taste and checks only production facts. Does the PDF open cleanly? Are both sides present? Is the trim size correct? Does the artwork bleed? Are the fonts embedded? Are the contact details right? Is the QR code tested? If a detail is visible at 100% on a plain-paper proof and still looks right, it will usually survive the press. If it only looks right on screen at 40%, it is not ready.

Preflight is not about making the design perfect. It is about making sure the file the printer receives is the flyer you intended to send.

Work through the checklist in order, fix what needs fixing, and then send the file with the printer’s job notes attached. The quiet pass before press is worth the time; it is far easier than explaining a reprint after the flyers have been cut.

Photo: 652234 / Pixabay