Cunninghamia lanceolate (CL) and Quercus. (QS) treated with PEG-200,PEG-600,PEG-1000,PEG-4000,PEG-8000,were evaluated antishrinkage efficiency of treatment. The effects of soaking, brushing and vacuum penetration methods on wood stability also were included in this study. Results were summarized as follows:
1.ASE of soaking method varied form 38.43%-57.66% for CL and form 35.78%-47.15% for QS. The efficiency of dimensional stability of PEG-600 and PEG-1000 were better than others. ASE of radial treatment was slightly larger than that of tangential treatment which revealed transverse anisotropie antishrinkage became more significant.
2. Bulking cofeeicient of CL and QS was 6.74% and 9.65% respectively, which variation tendency increased with the molecular weight of PEG.ASE showed positive correlation with chemical loading. Relative efficiency of treatment of CL was superior to that of QS.
3.Vacuum penetration method revealed the more stable dimension. Tangential and radial ASE of CL REACHED 74.35% and 60.21% when compared to 60.21% and 65.68%of QS.ASE of soaking method was similar to that of brushing method.
