The approval of a chemical for use as a timber preservative and the design of in service retention requirements represents an act linking fundamental research and commercial timber preservation. How difficult is it to translate figures generated through controlled experimentation into working specifications and how confident can we be in the methods used to provide such figures? The chairman of Working Group III recently highlighted the important link that that group forges between those workers involved in fundamental research and those actually practising timber preservation (IRG Document No. IRG/WP/5177). In this way, continuing progress is made in the development of environmentally safe and effective wood preservatives and methods of applying these. A further aim is to provide a special link between tropical and temperate wood preservation problems.

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