Short answer: raised text with a color contrast is the easiest to read on a printed label. A raised letter catches the light and you can feel it. A painted flat label can fade or rub off.
Why: a raised stroke 0.8 mm wide and 0.6 to 1 mm high casts a small shadow. That shadow makes it readable from arm's length. Letters 5 mm tall work with a 0.4 mm nozzle.
Rules of thumb for bin and shelf labels: - Raised text on a flat plate, printed face up. - Two colors, or a marker on the raised part, for contrast. - Bold sans-serif fonts. Thin or curly fonts fill in. - Add a QR code for the parts list, or raised braille for a blind reader. - Print one test tag first.
Shapiful adds the text to your own STL file in the browser, so you do not need a CAD program.
Make your first label: https://www.shapiful.com/?utm_source=mataroa&utm_medium=social&utm_campaign=labels_oct26