▁veget able ▁fib ers . ▁ ▁Fl at - pack ▁furn iture ▁is ▁typically ▁made ▁out ▁of ▁man - made ▁wood ▁due ▁to ▁its ▁low ▁manufact uring ▁costs ▁and ▁its ▁low ▁weight . ▁ ▁Types ▁of ▁products ▁ ▁P lywood ▁P lywood , ▁a ▁wood ▁struct ural ▁panel , ▁is ▁sometimes ▁called ▁the ▁original ▁engine ered ▁wood ▁product . ▁P lywood ▁is ▁manufact ured ▁from ▁sheets ▁of ▁cross - lam in ated ▁v ene er ▁and ▁bond ed ▁under ▁heat ▁and ▁pressure ▁with ▁dur able , ▁mo ist ure - res istant ▁ad hes ives . ▁By ▁altern ating ▁the ▁gra in ▁direction ▁of ▁the ▁v ene ers ▁from ▁layer ▁to ▁layer , ▁or ▁“ cross - orient ing ”, ▁panel ▁strength ▁and ▁st iff ness ▁in ▁both ▁directions ▁are ▁maxim ized . ▁Other ▁struct ural ▁wood ▁pan els ▁include ▁orient ed ▁str and ▁board ▁and ▁struct ural ▁composite ▁pan els . ▁ ▁D ens ified ▁wood ▁ ▁D ens ified ▁wood ▁is ▁made ▁by ▁using ▁a ▁mechanical ▁hot ▁press ▁to ▁compress ▁wood ▁fib ers ▁and ▁increase ▁the ▁density ▁by ▁a ▁factor ▁of ▁three . ▁This ▁increase ▁in ▁density ▁is ▁expected ▁to ▁enh ance ▁the ▁strength ▁and ▁st iff ness ▁of ▁the ▁wood ▁by ▁a ▁proportional ▁amount . ▁Early ▁studies ▁confirmed ▁this ▁ends ▁with ▁a ▁reported ▁increase ▁in ▁mechanical ▁strength ▁by ▁a ▁factor ▁of ▁three . ▁ ▁Chem ically ▁dens ified ▁wood ▁ ▁More ▁recent ▁studies ▁have ▁combined ▁chemical ▁process ▁with ▁traditional ▁mechanical ▁hot ▁press ▁methods ▁to ▁increase ▁density ▁and ▁thus ▁mechanical ▁properties