There is a special kind of frustration that comes from designing something beautiful on screen only to receive a printed version that looks nothing like what you intended. Colours shift, text gets cut off, images turn pixelated. The good news is that almost every print problem is preventable with proper file preparation. This guide covers the technical essentials that separate professional print results from amateur disasters.
Resolution: The 300 DPI Rule
Print requires far higher resolution than screen. While 72 pixels per inch looks fine on a monitor, print demands 300 dots per inch (DPI) for sharp, professional results. An image that fills a quarter of your phone screen may print clearly, but the same image stretched across an A4 brochure will look blurry and amateur. Always source high-resolution images for print, and check the effective resolution after scaling — a 300 DPI image placed at 200% becomes 150 DPI, which is unacceptable for most print.
Colour Modes: RGB vs CMYK
Screens display colour in RGB (Red, Green, Blue); printers use CMYK (Cyan, Magenta, Yellow, Key/Black). If you design in RGB and send the file to print without conversion, the printer converts it for you — and the results are often disappointing, with vibrant screen colours turning muddy or dull. Always design print files in CMYK from the start, and for brand-critical colours, use Pantone spot colours which are mixed specifically and reproduce consistently across printers.
Bleed, Trim, and Safe Zones
- Bleed — the area beyond the final cut size, usually 3mm, that ensures colour runs to the edge after trimming.
- Trim line — the exact edge where the printed piece will be cut.
- Safe zone — typically 5mm inside the trim line, where all important text and elements must stay to avoid being cut off.
- Crop marks — small lines outside the bleed area that tell the printer where to cut.
- Always export with bleed and crop marks unless your printer specifies otherwise.
File Formats and Fonts
PDF is the universal format for print, and a high-resolution PDF/X-1a or PDF/X-4 file is the gold standard. Convert all fonts to outlines (or embed them) to ensure they render correctly regardless of whether the printer has the same fonts installed. Avoid sending native files like Adobe InDesign or Photoshop unless your printer specifically requests them — a properly prepared PDF is what most printers expect and what produces the most predictable results.
If all of this sounds technical, that is because it is — but you do not need to master it yourself. We handle file preparation for every print project we deliver, and we are happy to prepare your existing artwork for print if you have designed it elsewhere. The cost of professional file prep is minimal compared to the cost of a print run that has to be redone because of avoidable errors.
