Go bold and rounded
Heavy, rounded display fonts usually print cleanly because their strokes are wide and their corners are forgiving. Lilita One, Luckiest Guy and Bangers suit playful signs; Poppins Bold and Barlow Condensed SemiBold give desks, labels and lightboxes a cleaner look.
Avoid thin serifs and script
Delicate serifs, hairline strokes and flowing script fonts have very thin sections that can be thinner than your nozzle. They look elegant but tend to print rough, weak, or with gaps. If you love a script look, use a bold brush script rather than a fine one.
Mind the counters and joins
- Letters with small enclosed gaps (a, e, g, 8) can fill in if the font is too heavy at small sizes: scale up rather than bolding further.
- Where letters touch, a halo backing joins them into one connected body, which is stronger and easier to print.
- Very tight letter spacing can merge neighbouring letters; loosen it slightly if strokes are blurring together.
Custom font upload is a Pro feature. Check the thinnest stroke in the preview and use the printability warnings because they measure the generated geometry, not just the font on screen.
Size matters more than font
Even a great font fails if it is too small. Aim for letters at least 25–30 mm tall for a desk sign so the strokes stay comfortably above the minimum printable width.