What Registration Marks Do in Screenprinting

Registration marks don't look like much. Tiny crosshairs in the corners of your films. Small pencil marks on the print bed. But they're what separates a tight four-colour edition from a bin of misprints.

I've been hand-pulling screenprints for twenty-six years. Every multi-colour print I make uses registration marks. Without them, you're guessing where layer two lands. By layer four, you're in trouble.

What Registration Marks Actually Are

They're alignment guides. Small targets placed outside your image area on every colour separation. When you expose each screen, these marks show through the emulsion alongside your artwork.

I use simple crosshairs. Two perpendicular lines forming a plus sign, roughly 5mm across. Some printers prefer corner boxes or dots. The shape matters less than consistency.

Each colour layer gets identical marks in identical positions. That's the whole system. When you print layer one, those marks transfer to your paper. Layers two, three, and four line up against them.

Where I Place Them

Bottom corners of the print area, outside the image. Far enough that they won't show in the final trimmed print, close enough that I can see them clearly when positioning the screen.

For a 50 x 70cm print on 56 x 76cm Somerset Satin, I place marks 2cm outside the image on each corner. Four marks total. Sometimes two is enough for smaller prints, but four gives better accuracy.

The marks need to be on your artwork file, your film positives, and transferred through to every screen. Miss them on one layer and that colour floats.

How They Work When Printing

First colour goes down. Let's say it's a Prussian blue base layer. The screen prints the blue ink plus those tiny registration marks in the same blue ink. Now your paper has reference points.

While the blue dries, I set up the second screen. Burnt sienna, let's say. This screen also has registration marks in exactly the same position relative to its colour layer.

I lower the screen carefully. Look through the mesh. The burnt sienna marks on the screen need to sit directly over the blue marks already on the paper. When they align, I lock the screen and pull.

If they don't align, I shift the screen a millimetre left or back or forward. Check again. Lock. Pull. That's registration.

The Paper Moves

This is what beginners miss. Paper isn't stable. Somerset Satin is 300gsm, dimensionally reliable, and it still shifts. Humidity swells it. Ink layers add moisture. The squeegee pressure pushes it.

You can't measure once and assume every sheet lands in the same spot. Registration marks let you check each print individually. The marks on the paper tell you where that specific sheet is sitting right now.

I've printed editions where sheet fourteen needed a 2mm adjustment compared to sheet thirteen. Same paper stock, same conditions. The marks caught it.

Transparent Base vs Snap-Off

Some printers use a transparent registration base with fixed pins or tabs. You line the paper up against physical guides for every sheet. It's faster for large runs.

I don't use one. Hand-pulled editions are small — thirty prints, maybe fifty. The time saved doesn't justify losing the ability to adjust for individual sheets.

Snap-off is the gap between screen and paper when the screen's at rest. I run a 2mm snap-off. Enough that the screen lifts cleanly after each pull, not so much that I lose registration accuracy. Registration marks let me check that the snap-off hasn't shifted mid-run.

What Happens When Registration Fails

You see it immediately. A colour layer prints half a millimetre off. Now you've got a white gap along one edge where two colours should meet. Or worse, an overlap that muddies both colours.

On a geometric print, half-millimetre drift is glaring. Even on loose, painterly images, poor registration looks uncontrolled. Not expressive. Just sloppy.

I've binned whole runs. Twenty prints, four colours each, eighty pulls total. One screen shifted during layer three. Registration marks showed me the problem at print six. I could've kept going, pretended it was intentional variation. But it wasn't. It was a mistake.

Pencil Marks vs Printed Marks

Some printers draw registration marks directly on the print bed in pencil. You line your paper up against the pencil guides, print the first colour, then use those printed marks for subsequent layers.

I did that for the first five years. It works fine if your paper stock is perfectly consistent and you're printing in controlled humidity. Once you're working with heavier gsm sheets or fluctuating conditions, printed marks on the paper itself are more reliable.

Trimming Them Off

Registration marks live outside the image area. When the edition's finished and dry, I trim them off. The final print shows no trace of the system that built it.

I leave 2–3cm of blank margin around the image for handling and framing. The marks sit just beyond that, in the area that gets cut away.

Occasionally a collector asks to keep them visible. They like seeing the process. I've done that twice. It feels a bit like leaving the scaffolding up after the building's done, but it's their print.

Why You Can't Skip Them

Single-colour prints don't need registration marks. The image is the image. One screen, one pull, done.

The moment you add a second colour, you need a system. Registration marks are that system. Crude, simple, effective. They've been standard practice for screenprinters since the medium existed.

I've watched printers try to eyeball it. Line up the screen by looking at the image edges, trust their spatial sense. It falls apart by colour three. Always.

If you'd like to see the prints I'm currently making, visit olifowler.com. Every edition is strictly limited and hand-pulled. Once they're gone, they're gone.