The raw materials used are tin tinplate, tin originated in Bohemia (now the Czech Republic and Slovakia). The land is rich in ancient metal, advanced technology, and know how to use water in machine manufacturing, from the 14th century began to produce tinplate. After World War I, the army made a large number of countries in iron containers (cans) and extended use today. Tinplate is coated with a layer of tin metal, it is not easy to rust, also known as tinned iron. Such coated steel in China for a long time called "tin", some people think because at that time manufactured using a tin plate cans (English name Macao read as horses mouth) imported from Macao, so called "tin." There are other claims, such as China's past manufacturing kerosene lamp in this tin plate, shaped like horses mouth, so called "tin." "Tinplate" is the name inaccurate, and therefore, when in 1973 China tin plate meeting has been name the tin plate, official documents no longer use the "tin" is the name. In order to reduce production costs, not all surfaces have tinned tinplate, tin plate did not we call substrates. Portion of the substrate is used or chromium plated, differs from tinplate, which is a tinned steel sheet no. Since tin is a precious metal, chromium and zinc prices of these two metals cheaper than tin. If you do not tinned tin foil surface, the most obvious is to reduce production costs. According to the different requirements of the packaging industry, thickness, tinned amount, the mechanical properties of materials such as tin have different needs. Since its inception, has been toward less tinplate tin, even without tin, tin thinned substrate thickness direction. Its purpose is to adapt to changes in the product and reduce the cost of canning canning.