http://patio-ir-heater.com/en/tags/cracks/ Recent content in Cracks on Quality Patio Infrared Heaters Hugo en-us Mon, 20 Jul 2026 10:03:44 +0800 http://patio-ir-heater.com/en/posts/why-glass-cracks-in-annealing/ Mon, 20 Jul 2026 10:03:44 +0800 http://patio-ir-heater.com/en/posts/why-glass-cracks-in-annealing/ <p><img src="http://patio-ir-heater.com/images/188f9035a5ed66fdec335fe67762e522.png" alt="Why glass cracks in annealing"></p> <h1 id="stop-your-glass-from-cracking-during-annealing">Stop Your Glass From Cracking During Annealing</h1> <p>It’s a nightmare scenario: you’ve spent hours on a run, only to find your glass cracking during annealing. It happens because the outside is heating or cooling at a different speed than the inside. That internal tug-of-war creates stress, and eventually, the material just gives up. Most shops just throw standard IR lamps at the problem. But here&rsquo;s the thing: those lamps often blast energy at wavelengths that the glass simply ignores or bounces right back. You end up searing the surface while the core stays cold. That&rsquo;s a recipe for a fracture.</p>