To the naked eye it is just a line, but magnified it is a microcosm. With a minimum font height, we can produce micro lettering really tiny that can only be read with a magnifying glass.
Braille lettering is produced in the same lamination step. No hot stamping necessary! Typical Braille dot height 140-160 µm (according to ISO standard).
Minimum font height 160 µm.
Minimum line width 25 µm.
Typical height of raised lettering 15µm.
Typical depth of indented lettering 15 µm.