Glass score line heating lamp

Mon, 27 Jul 2026 17:25:05 +0800

Fixing Those Pesky Cold Spots in Complex Glassware

If you’ve ever worked with glass that has weird shapes—narrow necks, flared rims, or those tricky handles—you know the headache. You put it in the kiln, you do everything by the book, but you still end up with “dead zones.” The problem is that standard kiln heating just floats around the piece. It doesn’t actually get into the recessed areas. That leaves you with uneven stress in the glass, and we all know where that leads: shattered pieces and wasted time. To fix this, we stopped relying on the air and started using shortwave infrared (IR) lamps. Instead of waiting for the heat to drift in, these lamps shoot thermal energy straight at the glass. Hitting the right spots Think of it like a flashlight. By angling these lamps just right, you can point the heat exactly where the glass stays cold. It means the whole piece hits the annealing point at the same time. We use high-wattage quartz tubes because they pack a punch. They get the glass back up to temp fast, so you aren’t sitting around waiting between cycles. The gear (and the gotchas) To get enough power, we usually go with 230V or 400V setups. It keeps the footprint small but pushes a ton of heat into the zone. We use R7s or Sk15 connectors because they just fit. You can usually drop them right into your existing industrial housings without having to tear apart your entire rack and start over. But here’s the thing: you have to watch your tolerances. These lamps get incredibly hot. Not just where the light hits the glass, but at the ends of the tubes too. If your cooling fans aren’t up to the task, you’re going to melt your wiring or fry your connectors. Don’t skip the cooling. Dealing with deep cavities If you’re working with deep bowls or hollow shapes, one lamp isn’t going to cut it. The glass ends up casting shadows on itself. The trick is to use a multi-lamp array. When you overlap the radiation patterns, those shadows disappear. The best part? You don’t have to leave the glass to “soak” in the kiln for nearly as long. You get your pieces out faster and stop burning electricity for no reason.

Line on Warm IR Heating Solutions

Glass score line heating lamp

Fixing Those Pesky Cold Spots in Complex Glassware