What are artwork and prepress? A 3-step checklist so your file doesn't get rejected

Artwork is the finished design file on your end. Prepress is all the work that gets that file into a press-ready state. People mash the two terms together, but the responsibility sits in different places: artwork lives mostly with the designer, while prepress falls on the printer's production team

In practice, prepress covers four jobs: converting RGB to print-ready CMYK, adding bleed and crop marks, checking that text is outlined, and confirming resolution and overprint settings are in order. Before you hand off the file, you only need to own the first three, let production handle the rest, and you'll move faster

The typical Taiwan workflow goes like this: designers export a PDF from Illustrator or InDesign and hand it to a full-service commercial printer like MINDS, whose prepress team takes over checking and imposition. Online retail printing (think business cards and stickers from places like Mai Print) runs mostly on automated checks, upload a PDF and the system flags common errors before a human ever sees it. That's the friendlier path for first-timers

Nine out of ten print rejections come from the same three places. Here's the simplest workable order:

・Resolution: 300 dpi minimum. That's the flat-out industry baseline for offset printing, go lower and the print comes out blurry. You can find the image-quality requirements in ISO 12647 (the international standard for print production processes) through stock-photo guidelines or general industry consensus; if your original camera file is large enough, you're fine. Anything you grabbed off the web is not

・Color mode: RGB must convert to CMYK. Screens emit RGB light (red, green, blue), printing layers CMYK ink (cyan, magenta, yellow, black), the two color spaces don't overlap. Those punchy neon colors you see on screen? They almost never survive the trip to press. No exceptions. If the colors look duller after conversion, that's normal

・Bleed: at least 3 mm on every side. Bleed is the extra bit of color your design extends past the trim line, so a hair of cutter error doesn't leave a white sliver. Taiwan's print industry treats 3 mm as the floor; Europe and the US often want 5 mm. Skipping bleed is the number-one rookie mistake

These three are the first gate you can hold on your own, and they make up the front end of the MINDS three-checkpoint submission flow. Clear this gate and your rejection rate drops by half

Outlining text (converting editable fonts to paths), imposition, overprint marks, embedding color profiles, these all sit in the printer's prepress lane. Trying to outline fonts yourself is how you end up with missing glyphs or wrong characters, and you've just made new problems for the file

Another common misconception: people think the moment bleed is added, the file is safe to send. They forget the "safe zone." Keep important text and graphics at least 3 mm inside the trim line, otherwise a sliver of cutter drift can clip a corner off your text. That's the safe-zone rule, it's not the same thing as bleed, but the two often get lumped together and ignored

Advanced color management, ICC profile mapping, PSO certification (the process-standardization certification pushed by FOGRA, the German printing research association), that's internal to the printer's production workflow. Unless you're printing something with brutal color demands (like a brand color bible), you don't need to understand that layer

Even after you've cleared the three checkpoints, the printer can still reject the file at the prepress stage. Four usual suspects:

・Fonts not embedded or outlined, the press throws a missing-font error when it boots up

・Transparency and layers not flattened, the RIP (the raster image processor inside the press) can't untangle them

・Black set as "pure black" instead of "rich black", large solid black areas come out with uneven ink set-off

・Bleed direction is wrong or bleed is missing, interferes with back-print finishing

All four are worth a final eyeball pass before you submit. If you're using an online upload system, the system catches these at that step and saves you the back-and-forth

Three steps: finish the layout in Illustrator or InDesign and export as PDF/X-1a (the industrial-standard PDF format for print); run through your three checkpoints (resolution, color, bleed) before uploading; once it's uploaded, wait for the printer's confirmation reply instead of pushing to print right away. For small runs of business cards, stickers, or flyers, online ordering is the easiest path. For a brand's annual catalog, packaging boxes, or anything with specialty finishing, you need a full-service commercial printer

・Artwork is the design file, prepress is the pre-flight workflow, different owners, different responsibilities

・Hold the line on 300 dpi, CMYK, and 3 mm bleed at the design stage; rejection rates drop by half

・Let the printer handle outlining, imposition, and overprint marks, don't do it yourself

・Safe zone and bleed are two different things; keep important elements at least 3 mm inside the trim line

・For a first print job, start with online ordering; upgrade to a full-service printer when you hit issues

For designers, how clean the artwork is sets the cost of talking to the printer. For printers, how standardized the prepress is sets the schedule and the yield. When both ends speak the same language (resolution, color, bleed, safe zone, file format), the whole supply chain moves a lot smoother

Next step suggestion: if you've got an old rejected file lying around, pull it out and run it against the three checkpoints, you'll usually find what went wrong. If you're building a team-wide submission SOP, start with the print templates from the Mai Strategy Knowledge Academy consulting team; turn the common rejection reasons into an internal checklist and new hires get up to speed way faster

・MINDS | Mid-to-high-end full-service commercial printing

・Mai Print | Affordable online retail printing

・Mai Strategy Knowledge Academy consulting team