The influence of artifical UV- and IR-radiation on the leaching of copper and chromium components of a CCB-preservative from freshly treated pine and spruce was evaluated. On small pinewood samples it could be shown, that the leaching of copper and chromium can considerabely be reduced by UV-radiation. A Philips HPA lamp type reduced the leaching most effective. IR-radiation lead to higher leaching. Leaching decreased with a higher intensity of radiation and a longer duration. Experiments with larger specimens showed, that a reduction in leaching of copper and chromium of ca. 70% can be reached with a 60 sec. radiation.

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