Smoking heat-treatment and natural drying of Cryptomeria logs in a reservoir

摘要

Cryptomeria japonica logs with bark that did underwater log stock for about four months in the reservoir were heat-treated in smoking, what had lumbered to rectangular lumbers at once after smoking was done, and natural drying was done in the warehouse only for the indoor cold curing. To find the possibility of the system of log stock in reservoir →smoking heat-treatment →natural drying, the weight after logs ware deforested, the weight after underwater logs, and the weight change after smoking, and Moisture Contents during natural drying were assumed to be an index in this report. As a result, it has been understood that the decrease in the weight of about 50% is seen, if it is based on the weight after underwater logs. Internal temperature in log during smoking becomes 80°C or more. The drying check was able to be reduced though a gradual decrease of MC was shown about the cold curing.