The board density affects the IB and MOR values of RSTIB,as shown in Table 5. An increase in the boards’ IB and MOR is observed with in creasing board density. At a board density of 200–350 kg/m3, the IB and MOR in creased 8- and 15-fold, respectively. In fact, during the mat forming process, the in creased board density produces more intimate contact between the particles to