Stop Your Glassware From Shattering During Cooling
Ever had a batch of glassware just… snap? It’s frustrating. Usually, it happens because the internal stress wasn’t handled right while the glass was cooling down. To fix this, we use shortwave infrared (IR) heating lamps for what we call “flash annealing.” It’s basically a way to stop thermal shock—that nasty temperature gap that makes glass crack. Don’t just blast it with heat. If you just crank the power to max, you’re asking for trouble. You need a system that can pivot fast. We pair our IR lamps with SCR controllers so you can dial the wattage up or down in milliseconds. It’s all about controlling the heat flux. By modulating the power, you make sure the outside of the glass doesn’t expand way faster than the core. That’s usually where the shatter-points hide. The gear under the hood We stick with halogen-filled quartz tubes. Why? Because quartz doesn’t warp when things get screaming hot. We also go with the shortwave spectrum because it actually sinks into the glass rather than just bouncing off the surface. Now, a heads-up: these lamps run at high wattages to get the heat density you need. But more power means more stress on your electrical panels. If you’re installing a big array, double-check your wiring and make sure your cooling fans can actually move the heat away from the housing. Otherwise, you’re just baking your own equipment. Getting it on your line The best part is that these are basically drop-in replacements for your standard annealing tunnels. We use precision connectors to keep the electrical fit tight, which means you don’t have to worry about arc-overs when the temperature spikes. You end up with a smooth thermal curve. The internal stress disappears, and you don’t accidentally push the glass past its transition temperature. It just works.