http://ir-heat-warm.com/en/tags/replacing/ Recent content in Replacing on Efficient Infrared Warming Systems Hugo en-us Fri, 24 Jul 2026 10:22:36 +0800 http://ir-heat-warm.com/en/posts/eliminating-cold-spots-in-glassware-annealing-kilns-using-infrared-quartz-heating-tubes/ Fri, 24 Jul 2026 10:22:36 +0800 http://ir-heat-warm.com/en/posts/eliminating-cold-spots-in-glassware-annealing-kilns-using-infrared-quartz-heating-tubes/ <p><img src="http://ir-heat-warm.com/images/9da744b25495c57ae28487141cd7aec3.png" alt="Replacing quartz heater tube"></p> <h1 id="dealing-with-cold-spots-in-complex-glassware">Dealing with Cold Spots in Complex Glassware</h1> <p>Ever try to anneal a piece of glass with a weird shape or a deep curve, only to find a &ldquo;cold spot&rdquo; that ruins the whole thing? It happens. Standard convective heating just doesn&rsquo;t cut it because the hot air can&rsquo;t actually get into those tight corners or deep recesses. It’s like trying to dry a wet sponge by blowing air at the outside of it. That’s why we use <a href="https://goldisgood.com">shortwave</a> infrared (IR) quartz heating tubes. Instead of relying on air, the IR radiation goes straight through the glass surface. It hits the core and the edges at the same time, so everything reaches that soak temperature together. No more guessing.</p>