Wood-based materials are generally prone to colonization by mould fungi and other discoloring microorganisms, but their resistance to fungal discoloration varies. Different standardized test methods for determining the susceptibility to mould fungi have been used to evaluate various wood-based materials, but the obtained results suggest that mould resistance depends on the method applied. Therefore, this study aimed at a comparative evaluation of two commonly used methods for determining the mould resistance of wood-based materials, i.e. the chamber method according to BS 3900—Part G6 and the malt agar plate method according to ISO 16869. Solid wood, wood fiber insulation boards and wood polymer composites were inoculated, incubated for different time intervals, and assessed with regard to superficial mould growth. Mould growth ratings obtained with the two methods did not correlate well, neither within one type of material nor across different materials, which can be attributed to higher moisture contents and additional nutrients available for the specimens in the agar plate test compared to those in the chamber test. It was concluded, that the experimental set up could have an overriding effect on the results of mould resistance tests.

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不同的木质材料对霉菌的抗性：方法的比较

木质材料通常容易被霉菌和其他变色微生物定植，但它们对真菌变色的抵抗力却有所不同。用于确定霉菌敏感性的不同标准化测试方法已用于评估各种木质材料，但是获得的结果表明，耐霉菌性取决于所使用的方法。因此，本研究旨在对两种常用的确定木基材料耐霉菌性的方法进行比较评估，即根据BS 3900-G6部分的室法和根据ISO 16869的麦芽琼脂板法。接种木质纤维绝缘板和木质聚合物复合材料，在不同的时间间隔下进行孵育，并评估其表面霉菌的生长。两种方法获得的霉菌生长等级在一种类型的材料内或在不同的材料上都没有很好的相关性，这可以归因于琼脂平板测试中的水分含量较高，并且样品中的营养成分比室内的更高测试。结论是，该实验装置可能对防霉性测试的结果具有压倒性的影响。