PVC advertising boards use a type of rigid polyvinyl chloride (PVC) foam board, also known as snowflake board or flannel board. Its core is polyvinyl chloride resin, which is made into lightweight and sturdy boards through foaming technology, with a smooth and flat surface and a honeycomb structure in cross-section.

This material is corrosion-resistant, flame-retardant, insulating, and easy to process. It can be carved, painted, and bonded, so it is loved for outdoor advertising and indoor decoration.