Abstract

Experiments were made on freshly sawn rubber wood (Hevea brasiliensis) to determine economical treatment schedules for green wood (about 75 moisture content (m. c.) ), partially air-dried wood (about 50 m.c.) and air-dried wood (12-18 m.c.) For air-dried wood, a suitable schedule was 15 min initial vacuum of 85 kPa, 15 min pressure of 1000 kPa and 5 min final vacuum of 85 kPa. Treatment with 3 boric acid equivalent solution gave a dry salt retention of 13. 1 kg/m3. Green wood could be treated with the same schedule by increasing the concentration of the solution to 6 boric acid equivalent