Drying in Russia: Research and Practice

This report is a discussion of the drying practices used in Russia as of 1963. The comment is made that the drying methods in the Soviet Union are in principle the same as in most other countries. Besides air drying, the common method is kiln-drying at temperatures considerably below the boiling point of water. Special drying methods are known but seldom applied. Drying schedules were developed empirically in research institutes and universities. One modification of standard procedure involves the observance of the shrinkage of lumber stacks in the drying process in lieu of the use of moisture content sample boards. Soviet scientists have paid much attention to experimental studies involving high temperature drying in superheated steam and petrolatum and mixtures of steam with air. In one method the wood is immersed in petrolatum at a temperature of 220 to 280?F. Deepest penetration is obtained with porous woods which are dried to a low moisture content and cooled in the liquid to a temperature below the boiling point of water. Usual veneer dryers are apparently of the roller type.

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