Heat treatment for quartz glass

Mon, 27 Jul 2026 17:16:21 +0800

Getting the Balance Right: Pattern Sharpness vs. Glass Strength

Here is the struggle when you try to temper glass right after screen-printing: you’re fighting a battle of physics. You need enough heat to lock in the ink and get rid of those internal stresses. But if you push too hard—or if you take too long to get there—your crisp patterns start to blur. Or worse, the ink starts bubbling. Not a great look. Why we lean on Shortwave IR We use shortwave IR lamps because they don’t mess around. They dive straight into the glass surface. Think of it this way: a convection oven just heats the air around the glass, which is slow. IR sends energy directly into the material. You hit that tempering temperature quickly without “soaking” the ink in heat for ten minutes. That’s how you keep your lines sharp. The trick with heat density It really comes down to two things: wattage and distance. If you go too heavy on the heat density, you’ll burn the ink before the core of the glass even gets warm. It’s a common mistake. We usually set up the lamp arrays to ramp up the heat gradually. It keeps the surface from frying while the center of the glass catches up. Power vs. Cooling (The hidden trap) Now, it’s tempting to just crank up those high-wattage quartz lamps to move more product through the line. But there’s a catch. All that power creates a massive amount of heat inside the housing. If your cooling system isn’t built to handle that buildup around the reflectors, the ends of your lamp tubes will just give out. You’ll be replacing bulbs way more often than you’d like. Dialing in the process Getting this right is all about the dance between your conveyor speed and the IR intensity. Move too slow? The ink bleeds. Move too fast? The glass never hits the stress-relief point, and you’re left with pieces that are prone to shattering. The best move is to actually test the flux at the glass surface. Make sure the heat is hitting every inch of that sheet evenly. Once you nail that, everything just clicks.

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Heat treatment for quartz glass

Getting the Balance Right: Pattern Sharpness vs. Glass Strength