On the tempering line, the marver section is where you lock in the edge profile and set the thermal gradient before the glass hits the quench. If the marver heat isn’t even, you lose edge compression, you get optical distortion, and you end up with scrap—whether it shows up as breakage during cutout or as field failures. We built our marver heating lamp for glass to take that variability out of the equation. What actually matters under the hood It runs on short-wave infrared (NIR) quartz emitters. The response is fast, and the radiation is directional, so you heat the glass surface without leaning on air convection. That gives you a uniform thermal field across the contact zone, which means edge temperature stays repeatable, sheet after sheet. Typical units run 5,000+ hours with less than 5% output drop, and the emitters swap out quickly—no need to re-tune the whole zone. Power density and lamp length are matched to the marver geometry, so the heat lands exactly where it needs to, where edge stress is controlled. Why it holds up on the line In production, the payoff is straightforward. The quicker thermal response cuts cycle time and keeps output stable when you change thicknesses, which means less off-spec tempered glass. With more uniform heat, thermal stress spikes drop, and you see better edge strength and cleaner opticals. Energy use falls because the lamp heats on demand and doesn’t waste time heating the surrounding structure. On a tempering line, that shows up as fewer rejects, more consistent bend control, and uptime you can actually count on. A few shop-floor details you’ll want to get right Installation comes down to reflector alignment and clearance to the glass path—get it off, and you’ll create hot spots. The lamp works with standard mounting and electrical interfaces, but verify local voltage and terminal ratings before you integrate it. And keep the emitter surface clean; dust and debris knock down emissivity and can drift the heat profile. Set up routine inspections, and the marver zone stays stable—no surprises, no drift.