a process for the treatment of wood of all kinds to impregnate the wood fully to its core with a resin component system , simultaneously with , or without , a flame retarding agent , or preservative , the process involving enclosing the wood in a chamber , evacuating the chamber in which it is enclosed in a slow time cycle , related to the structure of the wood , while adding a prepolymer aqueous solution to submerge the wood , continuing the vacuum , securing the vacuum , and applying pressure of prepolymer solution until the wood reaches the refusal point and , in certain more dense woods , repeating the vacuum and pressure cycle ; then completely purging the chemicals , evacuating the chamber and drawing a final vacuum on the wood for removal of surface liquid , and finally removing wood from the chamber .