In heartwood it occurs only in the first and last forms. Wood that is thoroughly air-dried retains 8–16% of the water in the cell walls, and none, or practically none, in the other forms. Even oven-dried wood retains a small percentage of moisture, but for all except chemical purposes, may be considered absolutely dry.
What kind of dried wood retains a small quantity of water but is considered absolutely dry?
{'text': 'oven-dried', 'answer_start': 193}