Why File Preparation Matters
You have invested in professional design for your business cards, brochures, or packaging. The layout looks perfect on your screen. You send the file to your Perth printer, approve the quote, and wait for delivery. When the box arrives, the colours are wrong, the text near the edges has been cut off, and the images look soft and blurry.
This scenario is entirely preventable. The issue is almost never the printer — it is the file. Print production follows strict technical specifications, and files that do not meet those specifications produce disappointing results regardless of how good the design looks on screen.
This guide walks you through every step of preparing print-ready files, from colour profiles and resolution to bleed setup, font handling, and PDF export. Whether you are preparing files yourself or reviewing work from a designer, this checklist ensures your print projects come back looking exactly as intended.
Step 1: Set the Correct Colour Profile
CMYK, Not RGB
Every print file must use the CMYK colour model. This is the single most common source of print problems — files designed in RGB (the colour model for screens) produce colour shifts when printed. Blues appear duller, greens lose vibrancy, and neon or electric tones shift to completely different hues.
Set your document to CMYK before you begin designing — not at the end. In Adobe InDesign, Illustrator, and Photoshop, choose the CMYK colour mode at document creation. If you are working with an existing RGB file, convert it early and manually review every colour after conversion. Our guide on print vs digital design differences covers the technical reasons behind these colour shifts in detail.
Choosing the Right ICC Profile
CMYK is a colour model, but the specific ICC profile determines exactly how CMYK values translate to ink on paper. The most common profiles used in Australia are:
- Fogra39 (ISO Coated v2): Standard for coated stocks — gloss, silk, and satin papers. The default choice for most commercial print in Perth.
- Fogra47 (ISO Uncoated): Standard for uncoated stocks. Accounts for the higher ink absorption and reduced colour gamut of uncoated paper.
- GRACoL 2006: Common in the United States and used by some Australian digital printers. Check with your supplier.
If you are unsure which profile to use, ask your printer before you start the project. Using the wrong profile creates subtle but visible colour differences between what you see on a calibrated screen and what comes off the press.
Step 2: Check Image Resolution
The 300 DPI Rule
Every image in your print file must be at least 300 DPI (dots per inch) at the final printed size. This is the threshold at which individual ink dots are invisible to the naked eye, producing smooth, sharp image reproduction.
The phrase “at the final printed size” is critical. A photograph that is 300 DPI at 10x15 cm is only 150 DPI if you scale it up to 20x30 cm. Resolution and physical size are inversely related — enlarge an image, and its DPI drops proportionally.
How to Check Resolution
In Adobe InDesign, use the Links panel to view the effective resolution of each placed image. Any image showing below 300 PPI (pixels per inch, functionally equivalent to DPI for this purpose) needs to be replaced with a higher-resolution version. In Photoshop, go to Image > Image Size and check resolution at the print dimensions without resampling enabled.
Common Resolution Mistakes
- Using images downloaded from websites: Web images are typically 72-150 PPI — far below print requirements. Even if they look fine on screen, they will appear pixelated in print.
- Scaling images up in the layout: Placing a small image and stretching it to fill a larger space reduces its effective resolution. Always source images at or above the required size.
- Assuming “it looks fine on my screen”: Your monitor displays images at screen resolution (72-150 PPI). A 72 PPI image looks identical to a 300 DPI image on screen — the difference only becomes visible in print.
Step 3: Set Up Bleed, Trim, and Safe Zones
Bleed: 3mm on All Sides
Bleed is the portion of your design that extends beyond the final trim line. It exists to account for the slight variation in where the cutting blade lands during trimming. Without bleed, you risk white strips appearing along edges where colour or imagery should extend to the boundary.
The standard bleed in Australia is 3mm on each side. Set this in your document setup when creating the file:
- InDesign: File > Document Setup > Bleed: 3mm on all sides
- Illustrator: File > Document Setup > Bleeds: 3mm
- Photoshop: Add 6mm to both width and height (3mm bleed per side), then add crop marks manually or through your PDF export
Every background colour, image, or graphic element that touches the edge of the page must extend to the full bleed boundary. If your design has a white background at certain edges, bleed is less critical at those edges — but it is good practice to set bleed uniformly.
Trim: The Finished Size
The trim line marks the actual finished size of your printed piece. This is the boundary where the cutting blade is aimed. Your design is built to the trim dimensions, with bleed extending beyond.
Safe Zone: 5mm Inside Trim
The safe zone — or safety margin — is the area 5mm inside the trim line. All critical content must sit within this zone: text, logos, barcodes, and any information that would be lost if partially trimmed. Cutting blades have a tolerance of 1-2mm, so content placed near the trim edge risks being cropped unevenly.
A common mistake in brochure design is placing phone numbers or website URLs too close to the edge of a panel. In a tri-fold brochure, this applies to every fold line as well — keep text at least 5mm away from fold lines to avoid distortion.
Step 4: Convert Text to Outlines
Fonts are software. If your printer does not have the exact same font files installed on their system, your text will either fail to render or be substituted with a different font — changing the look of your entire design.
Converting text to outlines (also called “creating outlines” or “converting to curves”) transforms each character from an editable font reference into a vector shape. The result looks identical but no longer depends on the font file being present.
How to Convert
- Illustrator: Select All > Type > Create Outlines
- InDesign: The preferred method is to embed fonts in your PDF export settings rather than outlining in the layout file. If you must outline, Edit > Find/Change can help locate all text frames.
- Photoshop: Text in Photoshop is rasterised when saved as a flattened file. Ensure the document resolution is 300 DPI before flattening.
Important: Keep an Editable Copy
Always save a separate editable version of your file before converting text to outlines. Once outlined, text cannot be re-edited — you cannot fix a typo, change a phone number, or update a price without redoing the outline conversion from the editable source.
Step 5: Embed All Images
When working in layout applications like InDesign, images can be either linked (referenced from an external file) or embedded (contained within the document). For print-ready files, all images must be embedded.
Linked images create a dependency on external files. If a linked image is moved, renamed, or not included when you send the file to your printer, it will either print at low resolution (the preview thumbnail) or not appear at all.
InDesign Workflow
Before exporting your print PDF, use File > Package to collect all linked images, fonts, and the InDesign file into a single folder. This ensures nothing is missing. When exporting to PDF, InDesign embeds all linked images at their placed resolution — but always verify the Links panel shows no missing or modified links before export.
Illustrator and Photoshop
In Illustrator, use the Links panel to check for linked images and choose Embed from the panel menu. In Photoshop, images are inherently embedded in the document — but if you are using Smart Objects linked to external files, convert them to embedded Smart Objects before saving the final file.
Step 6: Export the Print-Ready PDF
PDF/X-1a (Recommended)
PDF/X-1a is the most universally accepted print-ready format. It enforces several quality controls:
- All fonts are embedded or outlined
- All images are at placed resolution (not downsampled)
- Transparency is flattened
- Colour is locked to the specified CMYK profile
- No RGB objects are permitted
In InDesign, choose File > Export > Adobe PDF (Print) and select the PDF/X-1a:2001 preset. Review the following settings:
- Compression: Set image quality to Maximum and resolution to “Do Not Downsample” or a minimum of 300 PPI.
- Marks and Bleeds: Include crop marks and use the document bleed settings (3mm).
- Output: Confirm the colour profile matches your target (usually Fogra39 for coated stock).
- Advanced: Set transparency flattener to High Resolution.
PDF/X-4 (Alternative)
PDF/X-4 supports live transparency, layers, and ICC colour management. It is preferred by some digital and large-format printers. If your printer accepts PDF/X-4, it preserves more of your design’s original structure — but confirm compatibility before sending.
Step 7: Run a Preflight Check
Preflight is the final quality control step before sending your file to print. It catches errors that are invisible on screen but cause problems in production.
What Preflight Checks For
- Low-resolution images: Any image below 300 DPI at its placed size is flagged.
- RGB objects: Any element still in RGB colour mode that was not converted to CMYK.
- Missing or modified links: Images that have been moved, renamed, or edited since placement.
- Font issues: Missing fonts, incomplete font embedding, or corrupted font references.
- Bleed violations: Content that extends to the trim edge without sufficient bleed, or critical content outside the safe zone.
- Overprint settings: Accidental overprint that could cause elements to disappear or change colour on press.
How to Run Preflight
In InDesign, open Window > Output > Preflight. The built-in preflight runs continuously and flags errors in real time. For more thorough checking, use a custom preflight profile that matches your printer’s specifications. Many Perth print suppliers provide downloadable preflight profiles tailored to their presses.
In Acrobat Pro, open the exported PDF and run Edit > Preflight > Analyze. Select a PDF/X compliance check to verify the file meets print-ready standards.
Common Mistakes That Cause Reprints
Even experienced designers occasionally miss these issues. Double-check before sending:
- Black text set in four-colour CMYK instead of 100% K: Body text should be set in 100% Black (K only), not a rich black build (C:40 M:40 Y:40 K:100). Four-colour black on small text causes registration issues and fuzzy edges.
- Rich black for large areas not built correctly: For large solid black areas (backgrounds, panels), use a rich black build — typically C:40 M:30 Y:30 K:100. 100% K alone looks washed out on large surfaces.
- Hairline rules set too thin: Lines thinner than 0.25pt may not print visibly, especially on uncoated stock. Set minimum rule weights at 0.5pt for reliability.
- Forgetting to update linked images after editing: If you edit a source image after placing it, InDesign flags it as “modified.” Always update links before export.
- Not checking the print-side orientation for double-sided jobs: Ensure front and back pages align correctly, especially for items like business cards, tent cards, and folded brochures where orientation matters.
Working with Perth Printers
Perth has a strong network of commercial printers, from large offset operations to boutique digital print studios. Here are practical tips for a smooth working relationship:
- Ask for specifications before you start: Every printer has preferred file formats, ICC profiles, and bleed requirements. Getting these upfront prevents rework.
- Request a printed proof: For colour-critical work or first-time projects, always request a physical proof before approving the full run. Screen colours and printed colours are never identical.
- Provide organised files: Name your files clearly, include a brief with specifications (size, stock, quantity, finishing), and package all assets in a single folder. Printers appreciate well-organised submissions — it reduces back-and-forth and speeds up production.
- Build a relationship: Working with the same printer consistently means they learn your brand’s colour standards, preferred stocks, and quality expectations. This consistency improves output quality over time.
If you are managing your own print production for marketing collateral, business cards, or event materials, these relationships are worth investing in.
The Complete Print-Ready Checklist
Use this checklist before sending any file to print:
- Document colour mode is CMYK with the correct ICC profile
- All images are 300 DPI minimum at placed size
- Bleed is set to 3mm on all sides
- All critical content is within the 5mm safe zone
- All text is converted to outlines (or fonts are fully embedded in PDF)
- All images are embedded, not linked
- Body text uses 100% K black, large black areas use rich black
- No RGB objects remain in the document
- Exported as PDF/X-1a or PDF/X-4
- Crop marks and bleed marks are included
- Preflight check passes with zero errors
- Double-sided alignment is verified for multi-sided jobs
Outsource Your Print Design
At Amplify Creative Lab, we handle every stage of the print design process — from initial concept through to print-ready file delivery. Our marketing collateral and print design services include full file preparation, preflight checking, and direct coordination with Perth print suppliers to ensure your pieces come back perfect every time.
Whether you need business cards, brochures, packaging, or large-format signage, we deliver files that are production-ready from day one — no reprints, no colour surprises, no wasted budget.
Get in touch to discuss your next print project and let us handle the technical details.
Read our guide on print vs digital design differences or explore our full graphic design services in Perth.