▁of ▁the ▁wood . ▁In ▁these ▁methods , ▁chemical ▁processes ▁break ▁down ▁l ign in ▁and ▁hem ic ell ul ose ▁that ▁is ▁found ▁naturally ▁in ▁wood . ▁Following ▁dissol ution , ▁the ▁cell ul ose ▁str ands ▁that ▁remain ▁are ▁mechan ically ▁hot ▁com pressed . ▁Comp ared ▁to ▁the ▁three - fold ▁increase ▁in ▁strength ▁observed ▁from ▁hot ▁pressing ▁alone , ▁chem ically ▁processed ▁wood ▁has ▁been ▁shown ▁to ▁yield ▁an ▁ 1 1 - fold ▁improvement . ▁This ▁extra ▁strength ▁comes ▁from ▁hydro gen ▁b onds ▁formed ▁between ▁the ▁aligned ▁cell ul ose ▁nan of ib ers . ▁▁ ▁The ▁dens ified ▁wood ▁possessed ▁mechanical ▁strength ▁properties ▁on ▁par ▁with ▁steel ▁used ▁in ▁building ▁construction , ▁opening ▁the ▁door ▁for ▁applications ▁of ▁dens ified ▁wood ▁in ▁situations ▁where ▁regular ▁strength ▁wood ▁would ▁fail . ▁Environment ally , ▁wood ▁requires ▁significantly ▁less ▁carbon ▁dio x ide ▁to ▁produce ▁than ▁steel ▁and ▁acts ▁as ▁a ▁source ▁for ▁carbon ▁se quest r ation . ▁ ▁F ib re board ▁Med ium - dens ity ▁fib re board ▁and ▁high - dens ity ▁fib re board ▁( ▁hard board ▁) ▁is ▁made ▁by ▁breaking ▁down ▁hard wood ▁or ▁soft wood ▁resid uals ▁into ▁wood ▁fib res , ▁combining ▁it ▁with ▁w ax ▁and ▁a ▁res in ▁b inder , ▁and ▁forming ▁pan els ▁by ▁applying ▁high ▁temperature ▁and ▁pressure . ▁ ▁Part icle ▁board ▁Part icle ▁board ▁is ▁manufact ured ▁from ▁wood ▁ch ips , ▁saw mill ▁sh av ings , ▁or ▁even ▁saw