Q1: Is it normal for tempered glass to exhibit rainbow patterns on its surface?
It is normal for tempered glass to display slight rainbow patterns on its surface, primarily caused by uneven furnace temperatures or variations in stress distribution during the tempering process. However, high-quality tempered glass minimizes the visibility of such rainbow patterns through optimized manufacturing processes—for instance, Suzhou Fuxin Glass employs CNC cutting combined with a secondary verification process, along with tempering technology that adjusts the furnace temperature profile, effectively controlling stress distribution to render the rainbow patterns fainter and more uniform, without affecting normal use.