Sending your first artwork to a commercial printer is a bit like handing your car keys to a stranger. You hope everything is fine, but you have no idea what happens next. Then the email arrives: “File rejected: no bleed, RGB images, missing fonts.”
This guide is the fix. Below is a practical, printer-approved routine for how to prepare files for print, built around the checks a pre-press operator runs the moment your PDF lands in their inbox. Follow it in order and your job goes straight to plate instead of straight back to you.
First things first: ask for the printer’s spec sheet
Before you touch a single artboard, email your printer and ask for three things:
- Bleed and safety margin requirements (usually 3 mm / 0.125 in bleed)
- Preferred PDF standard (PDF/X-1a:2001 or PDF/X-4)
- Colour profile and total ink limit (for example FOGRA39 at 300%, or GRACoL 2013 for US work)
Ninety percent of rejected jobs happen because a designer guessed instead of asking. Two minutes of email saves two days of reprints. designhost.gr has a solid rundown on this.
The 6 most common reasons print files get rejected
| Rejection reason | What it looks like on press | The fix |
|---|---|---|
| No bleed | White slivers along trimmed edges | Extend artwork 3 mm past the trim on all sides |
| RGB colour mode | Dull, muddy or shifted colours | Convert to the correct CMYK profile |
| Low resolution images | Soft, pixelated photos | 300 DPI at 100% final size |
| Missing or unembedded fonts | Text reflows or swaps to Courier | Embed or outline all type |
| Text too close to the trim | Cropped phone numbers and logos | Keep 3 to 5 mm safety margin |
| 100% K black on large areas | Washed out grey-black panels | Use a rich black build |
Step 1: Build the document at final size, in the right units
Set your document to the finished trim size, not the paper size. A business card document is 85 x 55 mm (or 3.5 x 2 in), not A4 with a card floating in the middle.
- Work in millimetres or inches, never pixels, for anything that will be printed.
- Multi-page documents such as booklets should be built as single pages in reader order, not as spreads. Your printer imposes them.
- Cover artwork for perfect-bound books needs a spine width supplied by the printer, based on page count and paper thickness.
Step 2: Add bleed and a safety margin
Bleed is extra artwork that extends beyond the trim line so that guillotine movement of a millimetre or two never exposes white paper. Safety margin is the opposite: an interior buffer where no important content lives.
Standard bleed values by product
| Product | Bleed | Safety margin |
|---|---|---|
| Business cards, flyers, leaflets | 3 mm (0.125 in) | 3 to 5 mm |
| Posters up to A1 | 3 to 5 mm | 10 mm |
| Perfect bound covers, catalogues | 5 mm | 10 mm plus spine allowance |
| Stickers and die-cut shapes | 3 mm past the cut line | 3 mm inside the cut line |
| Large format banners | 10 to 25 mm plus hem allowance | 50 mm from eyelets |
Important: bleed only works if the artwork actually fills it. Dragging a photo 0.5 mm over the edge is not bleed. Push it the full 3 mm.
Trim marks (crop marks)
Trim marks tell the finisher where to cut. Rules that keep pre-press happy:
- Turn on crop marks and bleed marks at export, with an offset of at least 3 mm so the marks never sit inside the bleed area.
- Never draw crop marks manually as vector shapes on the artboard.
- Do not include registration marks, colour bars or page information unless the printer asks for them.
- For die-cut or folded jobs, supply the die line as a spot colour set to overprint, named exactly as the printer requests (commonly “CutContour” or “Die”).
Step 3: Convert everything to CMYK
Screens use RGB light, presses use CMYK ink. If you leave RGB in the file, either the RIP converts it with a generic profile or the printer converts it for you. Neither gives you control over the result.
- Set your document colour mode to CMYK from the start (File > Document Color Mode in Illustrator, or choose CMYK when creating an InDesign or Photoshop document).
- Assign the working profile your printer specified. Europe: Coated FOGRA39 or PSO Coated v3. North America: GRACoL 2013 or SWOP for web offset.
- Convert placed images to CMYK, or let InDesign convert at export using the correct destination profile.
- Delete unused swatches and convert stray spot colours to process, unless you are genuinely paying for a Pantone ink.
- Check your total ink coverage. Keep the sum of C+M+Y+K under the limit your printer gives you, typically 300% on coated stock and 240 to 260% on uncoated or newsprint.
Blacks: the detail that separates amateurs from pros
- Body text and small type: 100% K only. Never rich black, or you will see registration fringing.
- Large black panels: use a rich black build such as C60 M40 Y40 K100 (or ask your printer for their house recipe).
- Never use “registration” black (100/100/100/100). It floods the sheet and will be flagged instantly.
Step 4: Hit 300 DPI at final size
The number everyone repeats is 300 DPI, but the part everyone forgets is at 100% of the printed size. A 300 DPI image scaled up to 200% in your layout is effectively 150 DPI.
Quick resolution reference
| Job type | Minimum effective resolution |
|---|---|
| Business cards, brochures, magazines | 300 DPI |
| Line art and bitmap logos | 600 to 1200 DPI |
| Posters viewed from 1 to 2 m | 150 to 200 DPI |
| Banners and billboards | 72 to 100 DPI at full size |
In InDesign, open the Links panel and add the “Effective PPI” column. Anything under your target needs a bigger source file, not an upscale. AI upscaling can rescue a low-res photo in a pinch, but it invents detail, so never use it on logos, text or product shots.
Golden rule: logos, icons and type should be vector wherever possible. Vector is resolution independent and always prints crisp.
Step 5: Deal with fonts (outline or embed)
You have two safe options, and one that will get your file bounced.
- Embed the fonts in the PDF. This is the preferred route. It keeps text searchable, editable by pre-press if a small correction is needed, and renders perfectly. It only works if the font licence permits embedding, which most commercial and Google Fonts do.
- Outline (convert to paths). Bulletproof for logos, display type and anything with tricky OpenType features. In Illustrator use Type > Create Outlines. Do this on a copy of the file, because outlined text cannot be edited again.
- Do not send a native .ai or .indd file with the fonts “probably installed on their machine”. Package the file (File > Package) if native files are requested.
One more trap: outlined text below roughly 6 pt can thicken slightly on press. For very small print, embedding beats outlining. See swosu.edu for their take.
Step 6: Images, links and transparency
- Make sure every link is live and updated. No missing or modified links in the Links panel.
- Save placed images as TIFF, PSD or high quality JPEG. Avoid GIF, WebP and screenshots.
- Remove alpha channels and clipping paths you no longer use.
- Watch for transparency effects (drop shadows, glows, multiply blends) sitting over spot colours. Export to PDF/X-4 to keep transparency live, or flatten with a High Resolution preset if the printer demands PDF/X-1a.
- Turn overprint preview on while you work so you can see how overprints and white objects behave. White set to overprint disappears on press, which is a classic and very expensive mistake.
Step 7: Export the PDF with the right settings
A print-ready PDF is the universal currency of commercial printing. Here is what to choose.
| Setting | Recommended value |
|---|---|
| Preset / standard | PDF/X-4:2010 (or PDF/X-1a:2001 if requested) |
| Compatibility | Acrobat 5 (PDF 1.4) for X-1a, Acrobat 7 (PDF 1.6) for X-4 |
| Pages | Pages, not spreads |
| Compression | Bicubic downsampling to 300 ppi for images above 450 ppi, JPEG Maximum |
| Marks | Crop marks on, offset 3 mm, all other marks off |
| Bleed | Use document bleed settings (3 mm all round) |
| Colour conversion | Convert to destination (preserve numbers), destination = printer’s CMYK profile |
| Profile inclusion | Include destination profile |
| Transparency flattening | High Resolution (only applies to PDF/X-1a) |
| Security | None. No passwords, ever |
Which PDF standard should you pick?
- PDF/X-1a: everything flattened, CMYK and spot only. Maximum compatibility, zero surprises. Safest default for older offset workflows.
- PDF/X-4: live transparency, ICC colour management, layers supported. Better for modern digital presses and complex effects.
Step 8: Pre-flight and proof before you hit send
- Run Preflight in InDesign or Acrobat Pro. Fix every error, then read the warnings.
- Open the exported PDF in Acrobat and use Output Preview to check separations, ink coverage and overprints.
- Turn each plate off one at a time. Black text should live on the K plate alone.
- Print a physical proof at 100% on your office printer. Colour will not match, but layout errors jump out on paper in a way they never do on screen.
- Read every word out loud, backwards if you must. Pre-press does not proofread.
- Name the file clearly: ClientName_Product_Size_v3_PRINT.pdf. Not “final_final_2.pdf”.
Software-specific quick notes
Adobe InDesign
The correct tool for anything multi-page. Set bleed in File > Document Setup, check the Links panel for effective PPI, run Preflight, then export with Adobe PDF (Print). Use File > Package if the printer wants native files.
Adobe Illustrator
Set bleed in the New Document dialog or File > Document Setup. Use Document Color Mode: CMYK. Before export, run Select > Object > All Text Objects then Create Outlines on a copy, or simply embed fonts on export. Save as Adobe PDF with the Press Quality or PDF/X preset.
Adobe Photoshop
Photoshop is for images, not layouts, but if you must: create the document at final size plus 6 mm total (3 mm each side), 300 DPI, CMYK, 8-bit. Keep type as live text layers, then Save As Photoshop PDF with High Quality Print. Flatten only if your printer explicitly asks for a flat file.
Canva
Canva can produce usable print files. Design at the correct size, then Share > Download > PDF Print, tick Crop marks and bleed and choose CMYK (Pro feature). Without CMYK, expect a colour shift, especially in blues and oranges.
Microsoft Word, PowerPoint and Publisher
Office apps are RGB only, cannot create true bleed and handle fonts unpredictably. If you have no alternative, build the page oversized, export to PDF with maximum quality, and warn your printer in advance that colours will need conversion. For anything commercial, rebuild it in a real layout application. A similar approach shows up on 212plus.org.
The final pre-flight checklist
- Document built at exact trim size
- 3 mm bleed on all four sides, artwork actually filling it
- Important content at least 3 to 5 mm inside the trim
- Colour mode CMYK with the printer’s profile assigned
- Total ink coverage within limit, rich black on large solids, 100% K on small text
- All images 300 DPI effective at final size
- All links present, updated and embedded in the export
- Fonts embedded or outlined, nothing missing
- No stray spot colours, no white overprints, no registration black
- Exported as PDF/X-1a or PDF/X-4, pages not spreads
- Crop marks on with 3 mm offset, no security, no annotations
- Checked in Acrobat Output Preview and proofed on paper
Tick all twelve and your file will sail through pre-press. Skip one and you will meet it again in an email with the subject line “Issue with your artwork”.
FAQ
How do I get a file ready for print?
Build the document at final trim size, add 3 mm bleed, work in CMYK using the profile your printer supplies, keep all images at 300 DPI at 100% size, embed or outline your fonts, then export a PDF/X-1a or PDF/X-4 with crop marks and bleed included. Check it in Acrobat Output Preview before sending. The Guide to Creating Print-Ready Artwork tackles the same question from another angle.
What is the best file format to save for printing?
A print-ready PDF is the industry standard, specifically PDF/X-1a:2001 or PDF/X-4:2010. It locks in fonts, colour and layout in a single file every RIP can read. For individual images inside that layout, TIFF and PSD are the safest choices, with high quality JPEG acceptable for photos.
How much bleed do I need?
3 mm (0.125 in) on every side covers most standard commercial print. Increase to 5 mm for perfect bound covers and large posters, and 10 to 25 mm for large format banners. Your printer’s spec sheet always wins.
Should I outline fonts or embed them?
Embedding is generally preferred because it keeps text correctable and renders small type accurately. Outline when a font licence blocks embedding, when you use unusual OpenType features, or for logos and display type you never want touched. If you outline, always keep an editable master file.
Is 300 DPI always required?
No. 300 DPI is the benchmark for anything held in the hand. Large format work viewed from a distance is fine at 150 DPI for posters and as low as 72 to 100 DPI for billboards. What matters is the effective resolution at the final printed size, not the number in the original file.
Why did my colours look different on paper?
Almost always an RGB to CMYK conversion issue. Screens emit light and can display colours that ink physically cannot reproduce, particularly vivid blues, greens and neons. Convert to CMYK yourself, soft proof with the printer’s profile, and request a hard copy proof for colour-critical jobs.
Can I send a Canva or Word file to a printer?
Most printers accept a PDF exported from Canva if you enable crop marks, bleed and CMYK. Word files are far riskier because of RGB colour, font substitution and no true bleed support. For any job you are paying real money for, use InDesign or Illustrator, or ask a designer to prepare the final artwork.