Effect of Kiln-Drying on Distribution of BFCA Preservatives

In 5-cm beech wood the core retentions of components in BFCA formulation increased significantly with increasing diffusion time. All chemicals were redistributed, leading to core depletion during drying. This effect was most pronounced for the 4-week diffusion treatment, and only in this period the redistribution and less of chemicals were found to have an appreciable effect on the toxic threshold values. Following an 8-week diffusion period, net dry salt retention was high enough to achieve an acceptable threshold value provided wood is not resawn after treatment or drying.

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