http://warm-ir-fast.com/en/tags/cracks/ Recent content in Cracks on Fast-Response Infrared Heating Hugo en-us Fri, 26 Jun 2026 02:21:34 +0800 http://warm-ir-fast.com/en/posts/why-glass-cracks-in-annealing/ Fri, 26 Jun 2026 02:21:34 +0800 http://warm-ir-fast.com/en/posts/why-glass-cracks-in-annealing/ <p><img src="http://warm-ir-fast.com/images/1a5ec48e569a434982d1c9eda9d619d6.png" alt="Why glass cracks in annealing"></p> <p>On the line, a hairline crack out of the annealing lehr is never just a defect. It&rsquo;s downtime, rework, and heat you paid for that didn&rsquo;t do its job. Glass cracks in annealing when thermal stress overruns the annealing point—usually from uneven heating, overshoot, or unstable convection. You end up scrapping lites, throttling throughput, and running the lehr harder than it needs to run.</p>