Signs are essential in our life,it plays a directive and guidance role. Most common signs are made of aluminum,stainless steel and other materials,aluminum is the most widely used.Aluminum has a full range of applicability,and it has excellent performance in free combination,design and play,so the visual effect of the logo will be more outstanding than other materials,and can accept complex modeling,colorful design,and can carry more content.Aluminum weight is only one-third of stainless steel,light weight,cost is much lower than the traditional stainless steel plate,copper plate.And with light weight,high reflectivity mirror aluminum sheet and color coated aluminum sheet,is widely used in the sign industry.