COMPOSITION FOR TREATI NG MATERIALS, METHOD FOR TREATMENT OF MATERIALS AND MATERIALS TREATED WITH T

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A composition for the treatment of wood contains formate together with alkylketene dimer, dissolved in an aqueous liquid carrier. The formate is particularly an alkali metal salt, an alkaline-earth salt, an aluminum salt, or an ammonium salt. The composition is used for preservation of the materials, such as wood, simultaneously against surface mould and wood-rotting and blue stain fungi.