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 increasing 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