Getting Your IR Heat Right for Silk-screened Glass
When you’re annealing right after silk-screening, you’re basically walking a tightrope. You need enough heat to fuse the ink and get rid of those internal stresses, but if you go overboard? Your pattern blurs, your glass warps, and you’ve got a mess on your hands. That’s why we lean on short-wave IR lamps. They hit that sweet spot. The battle against “the bleed” Here’s the real headache: the bleed. If your IR intensity is too high or the glass sits under the lamps too long, the ink gets too thin. It runs. Your crisp lines start to smear. We set up these lamps to deliver a fast, heavy punch of heat. It cuts straight through the ink and hits the glass surface instantly. The goal is to cure that ink and relax the glass before the pattern even thinks about moving. The trade-offs (and where people mess up) You can’t just crank the dial and call it a day. You have to balance your wattage with how fast your conveyor is moving. Sure, a high-wattage quartz halogen tube gives you the power you need for thick glass, but it’s a beast on your power supply. Some folks try to over-voltage the lamps to keep up with a fast line, but that’s a shortcut to burning out your filaments. Plus, don’t forget the cooling. If your fans aren’t pulling the heat away from the housing, your sockets will just fry. Keeping things running We made these as drop-in replacements because nobody wants to spend their afternoon rewiring a rig just to swap a bulb. Standard connectors make it fast. One big warning, though:keep those quartz tubes clean. They’re great for letting the IR through, but they hate fingerprints and oil. A single smudge can create a hot spot, and then—pop—your tube is gone. Keep an eye on the ends of the lamps. If they start looking dark, swap them out. Don’t wait until your output drops and you start seeing under-tempered glass coming off the line.