The electronic devices using electromagnetic wave increases recently. It has been important to study the electromagnetic compatibility inside building space. In this paper, the recycling board using waste plastics and paper is developed and added electromagnetic wave absorption characteristic mixed with ferrite and carbon. The better mix proportion of absorption is examined with parallel wire line method by small-size specimen. Large-size recycling board with electromagnetic wave absorption is made and has rather than 10dB absorption characteristic of electromagnetic field strength in quasi microwave band. This board will be able to improve the complex condition in electromagnetic environment.
