Gallium lamp for screen print exposure

Mon, 29 Jun 2026 22:48:11 +0800

On the shop floor, screen exposure is where throughput and repeatability collide. Underexposed stencils wash out mid-run. Overexposed stencils choke fine detail and eat up press time. The problem usually isn’t the film—it’s the lamp’s spectral output and how evenly it delivers energy across the frame.

What matters, technically

Gallium lamps for screen exposure are built around a mercury-vapor discharge, tuned with gallium iodide to push output toward the 365–405 nm band—right where most photopolymer emulsions absorb efficiently. We specify peak irradiance at the emulsion plane, not just lamp wattage, because curing is about photoinitiator response, not heat. A stable spectral profile keeps dose consistent from exposure to exposure, and the reflector’s dichroic coating controls infrared, which limits thermal stress on thin frames and delicate films. Ozone-free operation and a controlled arc length translate to repeatable intensity across the whole image area.

Print on UV Curing System

Gallium lamp for screen print exposure

What matters, technically