Registration

Nothing tanks a multi-color order faster than bad registration — the alignment of each ink color relative to every other color on the same print. On press, every color gets its own screen locked into an indexed frame, called a head, and the press rotates each shirt under each head in the same fixed spot. If one screen sits even a sixteenth of an inch off from where the last one printed, edges that should butt cleanly instead show a sliver of shirt color or a stray halo of the wrong ink.

For a buyer, registration is the flaw you'll spot before anything else on a proof — a logo where the black outline doesn't quite sit over the red fill reads as cheap no matter how good the rest of the shirt is. On a detailed four-color job printed on a manual six-station press, we've walked a customer through a hundred-shirt run and pulled a dozen shirts off the line mid-press because the third color had drifted just enough to blur a thin outline.

Printers fight registration drift with micro-adjustment knobs on the press heads, tight screen tensioning, and checking every twenty-five to fifty shirts against a strike-off sample rather than trusting the first good print to hold. Designs with thin outlines or color-on-color detail need tighter tolerance than a bold single-color chest hit, one reason fine line art costs more to run cleanly.

Buyers often assume registration is locked in once at setup and can't shift mid-run, but shirts stretch differently depending on fabric and humidity, screens can loosen in their clamps, and a press that was dead-on at shirt ten can drift out of alignment by shirt three hundred — which is why quality shops spot-check throughout a run, not just at the start.