Preparing Files For A Print Shop

Why preparation matters

A print shop receives files from many designers, using many different tools and habits. To run jobs quickly and predictably, shops publish requirements and expect files to follow them. Files that do not may be delayed, fixed at an extra charge, or printed in a way that differs from what you intended. Getting the file right the first time is usually the quickest path.

Every shop has its own specifications, so treat this article as a general list of things to check. The shop’s own instructions always win.

Start from the shop’s requirements

Before finalizing, ask or look up:

• The preferred file format (most commonly a flattened or press-oriented PDF).
• The required bleed and safety margins.
• Preferred color setup.
• Maximum file size and how to upload.
• Whether pages should be single or combined, and whether crop marks are wanted.
• Whether any special elements, such as foil or die cuts, need separate layers.

Some shops provide templates or export presets. Using them removes many guesses.

Document size and bleed

Build the file at the finished size with bleed extended beyond it, and keep key content inside a safe margin. The mechanics are explained in the article on bleed and trim. Check that page count and order are right, especially for booklets, where the count often must be a multiple of a certain number depending on binding.

Images and resolution

Photographs and other pixel-based images need adequate resolution at the size they appear on the page. A figure of around 300 pixels per inch at final size is commonly cited for standard handheld print, though shops differ and large formats usually accept less. What matters is the effective resolution after scaling: a small image enlarged to twice its size loses half its pixel density, and the result can look soft. The basics of image resolution are worth understanding before you place pictures.

Related tips:

• Use original, uncompressed or lightly compressed images where possible, rather than versions saved from web pages.
• Do not rely on enlarging a low-quality image in the layout to fix it; upscaling cannot invent missing detail.
• Embed images or package them with the file so none go missing.

Logos and line art look sharpest when supplied as vector graphics, since they scale to any size without losing crispness. If a logo exists only as a small raster file, ask the client for a better version. Good logo scalability also makes this easier.

Fonts

Missing fonts are one of the most common causes of print problems. If a font is not embedded or supplied, the system may substitute another one, changing line breaks and spacing. Options include:

• Embedding fonts in the exported PDF, which is the usual approach.
• Converting text to outlines, which turns letters into shapes so no font is needed. It prevents substitution but makes the text uneditable and can slightly alter rendering of very small type, so keep an editable copy of the file.
• Supplying the font files if the shop requests editable artwork. Check the license first, as not every font license permits sharing; see the guidance on asset licensing.

Also confirm that small text is not too thin. Very fine strokes in light colors on a textured sheet can drop out.

Color setup

Print uses a different color model from screens, which means colors you choose on a monitor may shift. Shops often want files set up in the model used by their presses, and may ask you to avoid mixing several color definitions in one file. The reasons are covered in the article on color modes. A few specific notes:

• Convert or define colors according to shop guidance, not by guesswork.
• Large areas of very dark color may be specified in a particular way; ask about “rich black” and total ink limits if the job has heavy dark backgrounds.
• If a brand uses special named inks, the shop needs to know whether they should be printed as those inks or simulated with standard process colors.
• Small black text is usually best kept as a single ink, since layered inks in tiny type can look fuzzy if registration shifts slightly.

Transparency, effects and flattening

Drop shadows, soft glows and transparency effects are routine in design files but can sometimes behave unexpectedly during output. Flattening merges layers and transparency into a single flat result, and some workflows do this automatically at export. Check the exported file to be sure shadows and overlaps still look right. Some shops prefer you to flatten files yourself; others prefer a PDF that preserves live elements. Follow their instructions, and keep your editable working file separate from the version you send.

Hairline strokes thinner than the printer can reproduce may vanish or print inconsistently, so use a reasonable minimum line weight, commonly around a quarter of a point or more depending on the process. Ask the shop for its minimum.

Links, layers and extra items

• Make sure every linked image is present and up to date, or embedded.
• Remove unused layers, hidden objects, stray items off the page and leftover notes.
• Keep guides, comments and non-printing marks out of the exported file.
• Name files clearly, with the job name and version, to avoid confusion. A tidy system for brand assets helps you find the right logo or image quickly.

Check the exported file, not just the original

After exporting, open the PDF and look through it carefully:

1. Zoom in on text, edges and fine detail.
2. Confirm page size, bleed and page order.
3. Look for missing or substituted fonts.
4. Compare colors against what you expected.
5. Read all text again, including phone numbers, addresses and dates.

Many shops also offer automated preflight checks, which flag common issues. Use them as a safety net. A flagged warning may or may not matter, but it is worth understanding before you approve.

Keep communication open

If you are unsure about anything, ask. A short email with questions about size, color setup and delivery rarely annoys a shop, and it often saves a revision. Keep copies of what you sent and what the shop confirmed, since later questions about the job are easier to resolve with a record. When a project involves several people, defining who prepares the final files in the project scope prevents confusion about responsibility.

Good file preparation becomes routine with practice. Build a personal checklist from your shop’s requirements and reuse it on every job.