The Outlook for High-Temperature Seasoning in Canada

Kiln drying at temperatures above the boiling point of water was suggested as early as 1917. By 1940, German investigators had found the method worked well on selected species, and some commercial kilns were made. The Forest Products Laboratories of Canada acquired a high temperature kiln in 1952 to use in evaluating the process. The major shortcoming was large variation in moisture content throughout the dried charge. Degrade and discoloration were not excessively high. High temperature kilns will have greater initial cost than conventional kilns. Also, extra steam will be required. Operating costs are likely to be somewhat higher. The method seems to be most applicable to medium-to-small woodworking plants, where small loads must be dried as rapidly as possible.

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