Masson's Pine is a large resource of softwood in south-China. Its hardness and mechanical properties are middling. But there are lots of resin in Masson's Pine. The rosin acid will permeate from the lumber. Because of the resin, the utilization of Masson's Pine is limited. In order to enhance its utilization sufficiently, deresinning and drying of Masson's Pine are researched in this paper.
The results are as follows:

It is feasible to eliminate the resin by the alkaline liquor of NaHC03.
The main factors inflecting the effect of deresinning are the concentration of the liquor, the temperature of the liquor, the time of the processing and the proportion of the volume of water to that of the lumber.
After deresining, the permeability of water is improved, and the time of the drying process is decreased.
The main mechanical properties of Masson's Pine lumber are not changed.

CONCLUSION

It is feasible to deresin Masson's Pine by the alkaline reagent NaHC03. The best parameters are as follows: the time is 12 hours; the concentration of alkaline liquor is 0.5%; the temperature is 90°C; the volume proportion is 4.
The deresinning rate is more than 90%;
The permeability in radial direction is greater than that in tangential direction and all of them improve after deresinning.
The high temperature is feasible to dry Masson's Pine deresinned and the drying quality is fine.