UV lamp wavelength 365nm 420nm

Mon, 29 Jun 2026 22:50:56 +0800

On the press, a good run and a pile of scrap come down to the lamp spectrum and the dose you actually deliver. Under-cure the ink and it stays tacky. Get the peak irradiance wrong, and the substrate heats up, the register drifts, and you’re chasing problems down the line. We build UV lamps with tight spectral control at 365nm and 420nm so the energy hits the photoinitiator absorption where it counts, and keeps the heat off sensitive films. What matters under the hood 365nm drives the strong absorption of common photoinitiators in epoxy and pigmented systems, pushing cross-linking deep instead of just skinning over. 420nm penetrates better, giving a more uniform cure through thicker ink layers and supporting LED-like formulations that need longer wavelengths. Peak irradiance, measured in mW/cm², sets cure speed; energy density, in mJ/cm², sets throughput. We shape the spectral output with reflector geometry and dichroic coatings, cut wasted IR, and keep output stable over lamp life. You can expect stable output past 2,000 hours, with predictable decay curves you can model for scheduling. Here’s the payoff in UV offset, flexo, and screen work: you need repeatable cure at web speeds without scorching paperboard or warping PET. Lean on 365nm for high-speed clear coats and 420nm for thick builds, and you’re using two precise tools instead of guessing. You get faster cycle times, fewer rejects, and lower energy draw per cured square meter. Maintenance drops, too, because lamp life is predictable and replacements are quick-swap, with consistent arc gaps and terminations. Matching lamp length, arc gap, and reflector to your curing module is non-negotiable. Output falls off as reflectors age and get contaminated, so keep the optics clean and measure with a calibrated spectral radiometer. Confirm your power supply ballast and connector compatibility; mismatched drivers cause arc instability. Ozone management depends on the quartz envelope and operating conditions—run adequate airflow and stick to the specified clearances.

365nm on UV Curing Link

UV lamp wavelength 365nm 420nm