UV LED Curing for Fiber Optic and Electrical Cable Marking

Every telecom and electrical cable carries print along its jacket: manufacturer, type, rating, fiber count, and sequential length marks that an installer uses to know how much cable is left on the drum. That print has to survive being dragged through conduit, pulled around bends and handled in the field years after it was made — if the legend is illegible the cable cannot be identified without tracing it end to end.

The traditional marking methods each cost something. Embossing and indent printing deform the jacket to form the character, which puts mechanical stress into the cable and, on a fiber cable, risks the fiber underneath. Hot-stamp foil printing needs contact and consumes ribbon, which is waste and a stoppage every time it runs out. Mercury-lamp UV avoids the contact but adds radiant heat onto a jacket that is still warm from extrusion, and generates ozone that has to be extracted from a line that may run for hundreds of metres.

UV inkjet removes the contact entirely. The jacket passes a corona or plasma treater that raises its surface energy so the ink wets rather than beads, an inkjet head lays down the legend without touching the cable, and a high-dose UV LED head immediately downstream cures the ink before it can smear or pick up on the next roller. Nothing presses on the cable and nothing is consumed but ink.

The dose is the constraint: the ink is thin, the cable is moving fast, and the exposure window is short, so irradiance has to be high. From the ETIA catalogue the OmniCure AC8-HD delivers over 15 W/cm² at 385–405 nm — roughly double the standard AC8 — with per-module output addressing and a rated LED life over 20,000 hours. The 300 mm AC8300P-HD, with the 'P' print optics, is the configuration that matches a marking station running 395 nm ink. Being LED, it produces no ozone and carries no infrared load onto the jacket.

OmniCure® AC8-HD (AC8300P-HD) is recommended for cable marking because it gives the high 395 nm dose a thin inkjet film needs in a short exposure window, with print-optimised optics, no ozone extraction and no radiant heat onto a freshly extruded jacket.

As an authorized OmniCure® distributor, ETIA supports application review, product selection, genuine supply, installation, training, troubleshooting, and long-term service.

ETIA helps customers translate UV curing requirements into practical, reliable production solutions.