High intensity mercury UV tube

Fri, 05 Jun 2026 06:18:50 +0800

Old offset, flexo, and screen lines don’t slow down because the mechanicals give up—they stall when the curing window shrinks. Output falls when peak irradiance drops, the spectral output drifts, and reflector reflectivity degrades. On the floor, that shows up as slower web speeds, tail-end tack, pinholes, and adhesion problems. We built high-intensity mercury UV tubes to claw that performance back on legacy equipment. What actually matters under the hood We anchor the tube in a high-pressure mercury vapor discharge with a stable spectral profile: strong 365 nm for deep cross-linking, balanced 385–405 nm for surface cure and photoinitiator response, plus broadband output to handle pigmented and thick-film jobs. Peak irradiance at the substrate hits 1200–1600 mW/cm² (geometry dependent), putting energy density in the 400–800 mJ/cm² range at typical press speeds. The quartz envelope is doped to control ozone and keep output stable. A dichroic-coated elliptical reflector recovers short-wave energy, so the lamp stays effective at 30–60 mm working distances. Specs are only useful if they repeat—these lamps hold under 5% output drop at 5,000 hours. Why it plays on the shop floor On an older offset press, the same lamp position now delivers more curing energy at the sheet, so you can bump speed without fighting tail tack. On flexo, the broader spectrum and tight arc profile reduce cure-through-thickness gradients, which helps dot integrity and color density. On screen, the intensity supports thicker deposits and higher solids, so you cut pass count. You get back the throughput you lost to the “just slow down” compromise, with fewer rejects and less solvent load. Here is the practical part Retrofit isn’t plug-and-play. Check arc length, end fittings, and reflector geometry—mismatched reflectors waste intensity and can overheat the lamp. Confirm ballast compatibility; if the current doesn’t match the tube, output and life both collapse. Expect higher instantaneous power draw, so make sure the electrical path and cooling airflow can handle it. Treat the lamp as part of a system: keep reflectors clean, align the focal plane, and use spectral radiometry to set a repeatable cure baseline.

Intensity on UV Curing Link

High intensity mercury UV tube