Color metal profiled steel plates are typically categorized into two main types based on the finished product type processed by the factory: veneer panels and composite panels. Veneer panels are primarily used in buildings that do not require insulation or thermal protection. These panels are often combined with internal rafters or wall beams to create a roofing and wall system. On the other hand, composite panels are designed for structures that demand insulation and heat resistance. They can be further divided into two categories based on construction methods: site-composite panels and factory-composite panels. Factory-composite panels are fully manufactured at the factory, including the core material, and then assembled on-site. Once installed, they are combined with internal rafters or wall beams to form the roof or wall envelope structure. This method significantly reduces on-site labor and speeds up the construction process, making it ideal for large-scale projects with tight deadlines. However, it requires substantial initial investment and is more suitable for projects with significant production volume. In contrast, site-composite panels are produced as individual boards at the factory, while the sandwich core is added on-site. The choice of panel type depends on the specific application. For example, in some roof systems, internal rafters are used along with the core to form the structural framework. Similarly, wall composite panels use wall beams as internal supports, with the core material integrated to create the exterior envelope. Site-composite panels generally take longer to construct but require less equipment investment, making them well-suited for smaller or medium-sized projects. Currently, this method is considered the most practical for color plate installation due to its flexibility and cost-effectiveness. Common materials used in composite panels include polyurethane foam, polystyrene, rock wool, and glass wool. The selection of these materials should be based on factors such as the project size, construction timeline, technical requirements, and local industrial capabilities. Choosing the right type of panel ensures both efficiency and long-term performance in any building application. Image spectrophotometer,Complex color spectrophotometer,Desktop LED spectrophotometer CHNSpec Technology (Zhejiang)Co.,Ltd , https://www.chnspec360.com