Getting the Heat Right for Your Glass
Making wine glasses is a balancing act. If you don’t get the thermal management exactly right, you’re left with internal stress—which is basically a ticking time bomb for your glassware. The problem is that standard infrared heaters are kind of a “one size fits all” solution, and in this business, that doesn’t work. Different additives change how glass absorbs energy. We fix that by tuning the infrared spectrum to match the specific chemistry of your glass. The trick is in the peaks. Glass isn’t just one thing. Depending on the colors or clarifying agents you’re mixing in, your glass only “wants” to take in heat at certain wavelengths. If your heater isn’t hitting those specific spots, the energy just bounces off the surface. It’s a waste of power and it leaves you with uneven heating. We tweak our lamps to hit those exact absorption peaks. The result? The heat actually sinks deep into the glass wall. It means your pieces spend less time in the lehr and move through the line faster. The gear behind it. We build these heaters to survive the chaos of a real production line. By messing with the filament and the quartz coatings, we can shift the wavelength from shortwave to medium-wave. Now, high-wattage setups are great for a fast ramp-up, but you’ve got to watch your conveyor speed. If you crank the heat density too high without speeding up the line, you’ll start seeing surface deformation. It’s all about the sync. A few things to keep in mind. Custom tuning isn’t a magic wand that fixes every single problem. To keep that target wavelength steady, you need your voltage to be rock solid. If your power supply is jumping around, your spectral peak shifts. It’s a pain, but it’s avoidable. You’ll want a dedicated controller or a stable transformer to keep the heat profile consistent across the whole annealing zone. That’s how you hit the annealing point perfectly without scorching the outside of the glass.