(4) in addition to flavoring agents and formaldehyde capture agents, the free formaldehyde in wood-based panels can be effectively reduced when used in decoration works. The commonly used method is to spray formaldehyde scavengers or formaldehyde traps in indoor air, or to use some preparations that can instantly eliminate odor. These methods only have a scavenging effect on free formaldehyde and can not be effective for formaldehyde released from basic artificial boards. There is also a kind of formaldehyde removal method is to use the closed principle, directly used on the surface of furniture, with this formaldehyde scavenger, will have transparent or bright white film on the furniture surface. Although the sealing method has immediate effect, but the long time closed also has loopholes, and can not fundamentally remove formaldehyde.