Getting the Heat Right in Your Glass Annealing Lehrs
Here is the problem with standard infrared lamps: they’re generic. They’re built for “average” glass. But if you’re working with specialty glass—the kind with specific additives or chemical dopants—those materials don’t play by the same rules. They have their own unique absorption peaks. Using a standard lamp on specialty glass is a waste. You’re paying for energy that the glass just bounces right back. We fix that by tuning the infrared spectrum to match the exact chemistry of your glass. It’s about precision, not power. We don’t just crank up the wattage and hope for the best. Instead, we tweak the filament and use specific quartz coatings to shift the emission curve. Think of it this way: instead of just scorching the surface, we’re pushing the heat deep into the bulk of the glass. It’s a much more efficient way to get the job done. Now, there is a catch. When you narrow the spectrum to hit a specific peak, you lose some of that raw, total output. You can’t have a surgical strike of heat and maximum raw wattage at the same time. It’s a trade-off. To make up for that loss, you might need to add a few more lamps to your lehr or move the lamps a bit closer to the glass. It’s a small adjustment to keep your temperature profile exactly where it needs to be. The best part? You don’t have to tear everything down. These lamps are designed as drop-in replacements. We match the voltage and length to your current racks and wiring, so you can skip the headache of rebuilding your frames. You’ll notice the glass responds faster to the heat, which means more consistent annealing cycles. Just a heads-up: you’ll want to recalibrate your PID controllers. Since the heat penetration is so much more efficient, your old settings might be a bit too aggressive.