Annual Review of Wood Drying

Activities in wood drying are covered for the period from July 1, 1964 to June 30, 1965. A bibliography of 60 references is included. The review also includes comments received in personal correspondence. Several college research units reported plans for new studies in air-drying, high-temperature drying, drying costs, and wood-moisture relations. Solar drying research is underway in at least two locations. Industrial work on the West Coast has been pointed at high-temperature drying and increased kiln capacities through use of faster schedules and thinner stickers. In the South, there has been increased interest in schedules for drying the heavier thicknesses of southern pine and southern pine poles. In hardwood drying there is continued interest in high quality of output and ways to reduce degrade. The following definitions are proposed: 1) Forced drying – mechanical air circulation through lumber stacks where there is no control over air temperature and humidity. 2) Low-temperature drying – a process where additional heat, up to 100?F, is supplied, and humidity is controlled, at least to a limited extent. 3) Kiln-drying – drying within the temperature range of 100? to 200?F with control of temperature and humidity. 4) High-temperature drying – drying at temperatures above 200?F or possibly above 212?F.

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