Glass Tempering Furnaces c

IV. Comparison of two methods First, as the immersing method uses a stainless container which limits the size and shape of glass, Second, because glass sheets need to be taken out from potassium nitrate solution with high temperature, a set of heat-resistance device is absolutely necessary to make the whole e very expensive. Glass Tempering Furnaces Third, each time before tempering glass, the potassium nitrate in the container must be melt, the melting takes more than 48 hour, some large containers need 72 hours. This not only affects production time, but also causes energy waste, and increases production cost. The whole processing is complex and complicated. But the coating method does not need container, so the shape and size of glass are basically unrestricted, especially some special shaped glass, for example glass sheets with super size and deep curvature only can be processed by coating method. Because without heating resistance device, so the e is relatively simple. The production cost of coating method is much lower than the production cost of the immersing method, usually the cost is no more than 0.8 USD/square meter. Glass Tempering Furnaces