What Are Artwork and Prepress? 3 Checks to Stop Getting Your Files Rejected

Artwork is the design file you've finished. Prepress is all the up-front work to get that file into a printable state. People use them interchangeably, but the responsibility sits in different places. The success or failure of the artwork mostly lives on the design side; the details of prepress belong to the print shop's production team

In practice, prepress covers four jobs: converting RGB to CMYK for print, adding bleed and crop marks, checking that text has been outlined, and making sure resolution and overprint settings are dialed in. Before you hand off, just own the first three; let production handle the rest and the whole thing moves faster

The typical Taiwan workflow goes like this: the designer exports a PDF from Illustrator or InDesign, hands it to a full-service commercial printer like MINDS Print, where the prepress team takes over for checks and imposition. Online retail printing (think business cards and stickers from MINDSprt) usually runs through automated checks, the system catches the usual mistakes the moment you upload your PDF, and that path is the friendliest one for first-timers

Nine out of ten print rejections come from these three places. Line them up as the simplest workable routine:

・Resolution: 300 dpi minimum. This is the published industry baseline for offset print; go lower and the output turns mushy. Stock assets and the general industry consensus both point to ISO 12647 (the international print process standard set by the standards body for print) for image quality requirements. If your camera originals are big enough, you're fine; anything pulled off the web won't cut it

・Color mode: RGB has to become CMYK. Screens emit red, green, and blue light (RGB); printing layers cyan, magenta, yellow, and black ink (CMYK). The two color spaces don't overlap the same way. Bright, almost neon colors on your screen are almost never reproducible in print. There are no exceptions to this. The colors going dull after conversion is normal

・Bleed: 3 mm on every side minimum. Bleed is the extra bit of color that extends past your design edge, so that even with a hair of cutting error, no white sliver shows. Taiwan's print industry generally treats 3 mm as the floor; 5 mm is common in Europe and the US. Skipping bleed before submission is the classic rookie mistake

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

Outlining text (turning editable fonts into paths), imposition, overprint marks, embedding color profiles, these all sit in the prepress pro's wheelhouse, and the printer's prepress team will handle them faster than you will. Outlining fonts yourself is how you end up with missing characters or wrong substitutions, which just creates a new set of problems

Another common trap: people think once bleed is in, they're good to go, and forget about the "safe margin." Keep any important text or graphics at least 3 mm inside the trim line, or a tiny cutting error will slice off a corner. This concept is called the "safe zone," different from bleed, and it gets overlooked just as often

Advanced color management (ICC profile mapping, PSO certification, FOGRA, the German print research association's process standardization certification) is the printer's call on their own production line. Unless the job has very tight color demands (say, a brand color guide), the client side doesn't need to know this layer

Even when you've cleared the three checks, the printer may still kick it back at the prepress stage. Four usual suspects:

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

・Transparency and layers not flattened, so the RIP (the press's raster image processor) can't crack the file open

・Black set as "pure black" instead of "rich black," which leaves big black areas looking patchy and uneven

・Bleed going the wrong direction or missing entirely, messing with any back-print finishing

All four are worth one more pass before you submit. If you're using an online ordering system, the upload itself will catch these errors and save you the back-and-forth

My advice in three steps: finish your layout in Illustrator or InDesign and export as PDF/X-1a (the industry-standard PDF format for print); run your own three-check pass (resolution, color, bleed) before uploading; once it's in, wait for the printer's confirmation message instead of pushing for a print run. If you need small runs of business cards, stickers, or flyers, online ordering is the easiest. If it's a brand annual catalog, packaging boxes, or anything with special finishing, you need a full-service commercial printer

・Artwork is the design file, prepress is the prep pipeline; two different jobs

・Hold the 300 dpi, CMYK, 3 mm bleed line on the design side and rejections drop by half

・Let the printer handle outlining, imposition, and overprint marks; don't DIY it

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

・First print job? Start with online ordering; move up to a full-service printer when you hit edge cases

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

Next step: if you have a rejected file from the past, pull it out and run it against the three checks; the culprit is usually right there. If you're building a team submission SOP, start from the templates at MINDS Knowledge Academy consulting team, write the common rejection reasons into an internal checklist, and new hires ramp up a lot faster

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

・MINDSprt | Budget-friendly online retail printing

・MINDS Knowledge Academy consulting team