Angle relaxation: The process of rolling flat sheets into various types of pleats.

The thickness of the color steel sheet is determined by the coil provided at the time of purchase, while the width is decided by the type of roller press machine. Color steel sheets with a thickness of 0.8mm or more are suitable for roofing. Sheets with a thickness under 0.8mm are for walls, and the width of walls should slightly vary (wider widths with lower wave peaks are more aesthetically pleasing). Common wall widths are: 0.82, 0.9, and 0.95.