We developed an accelerated test for leaching at elevated temperatures (75-85°C). This test was used for the examination of 11 preservative formulations containing Cu, Zn and As. The data obtained from these experiments were compared with data on some formulations tested by ASTM standard leaching test. The method consists in making a large surface to volume ratio of wood from a treated block by cutting into sections approx 40 µm thick and in cyclic extracting preservative salt with a total of 250 ml of distilled water at the elevated temeratures for 24 hours. In conclusion, the new accelerated teet proved to be a fast method which provided reproducible dala on the leech-resistance of various inorganic preservatives. The data are comparable with data of traditional leaching tests at room temperature.

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