UV lamp for screen printing

Wed, 24 Jun 2026 07:52:27 +0800

Out on the press floor, the part itself calls the shots. Run a non-planar substrate and you get the same predictable problem: the lamp clears the flats, but UV energy gets blocked in the shadows—leaving ink uncured, tacky, and ready for the scrap bin. We built this UV lamp for screen printing with one goal: rework the energy map so those shadows don’t stand a chance. What matters under the hood We anchored the system in a high-pressure mercury vapor lamp, tuned for stable spectral output that lines up with the photoinitiator absorption bands in most screen-printing UV inks. That means strong output at 365 nm, backed by 385 nm and 405 nm. Peak irradiance is set so the photoinitiator hits radical generation fast—before the ink film has time to slump. Then we pair the lamp with a dichroic-coated reflector array that shapes the beam angle, cutting stray light and boosting on-target energy density. The payoff is repeatable curing at 800–1200 mJ/cm² on the print surface, measured with a calibrated spectral radiometer, not guessed at. Why it works in real production These aren’t just heat sources—they’re irradiance profiles matched to shape. On irregular parts—domes, flanges, ribs—we adjust lamp layout and reflector geometry so UV wraps into recesses without hammering the high points. That kills the curing shadow that leaves recesses under-cured and peaks over-cured. You get consistent cross-linking across the whole print, fewer rejects, and cycle times that stay steady even when geometry changes. The practical details you’ll run into These lamps drop into most industrial screen-printing lines, but integration isn’t plug-and-play. You’ll need to specify mounting, airflow, and power to match your machine envelope, and lock in reflector-to-substrate distance to keep the designed irradiance profile intact. Output stability hinges on consistent lamp temperature, so plan for controlled cooling and a routine radiometer check. With scheduled lamp-life maintenance, we’ve seen units run 5,000+ hours with under 5% output drop.

Mercury UV lamp for offset printing

Tue, 23 Jun 2026 09:06:57 +0800

On the PCB line, the offset press is laying down solder mask over 50-micron traces. Undercure here doesn’t just mean a bad board—it means bridging, adhesion loss, and scrap. The lamp has to deliver repeatable energy, right where the ink sits, every time. What matters, technically With Mercury vapor lamps for offset curing, it comes down to spectral output and energy density. We run a dominant 365 nm peak, matched to the photoinitiators in epoxy-acrylate solder masks. Peak irradiance hits 12 W/cm² at the web, and you’re pulling 800–1200 mJ/cm² across the dwell. Reflectors use dichroic coatings to shape the envelope, keeping heat off the substrate while pushing more UV onto the ink. Power is calibrated to press speed. A 1200 W/inch unit will stabilize cure at 300–600 fpm without overshoot. Output stays within ±5% over the first 2000 hours, and we specify lamp life at 5000 hours with a controlled end-of-life ramp—no sudden drop. Ozone-free quartz envelopes keep the cleanroom compliant. Why this works on the PCB line Solder mask cure is a tight-tolerance job. The 365 nm band drives surface and depth cure at the same time, so the ink cross-links across micro-features without under-cure at the line edges. The shaped spectral envelope cuts exotherm that can distort FR-4 and thin laminates. With stable irradiance, you can push press speed up without having to chase ink formulation. You’ll see fewer rejects on fine pitch, consistent pencil hardness, and lower solvent emissions. And because reflector efficiency focuses UV, not heat, energy draw drops. Here’s what to keep in mind Match the lamp to the printer’s reflector geometry and the shutter duty cycle. Mercury lamps need ballast synchronization and stable mains—voltage sag causes arc drift and spectral instability. Confirm substrate temperature limits too. Quartz runs hot, so airflow and heat shielding are mandatory around sensitive boards. Build in an interlock and UV metering. Set a maintenance interval at 2500 hours to verify output. This isn’t a plug-and-play swap unless the fixture, power, and cooling are all aligned.

Printing on UV Curing Techs

UV lamp for screen printing

Mercury UV lamp for offset printing