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Complexes of sulfited tannin extract and a copper(II) ion effectively protect wood against fungal attack. The complex can be impregnated into wood in a single step treatment using a water/organic solvent system, or formed in situ by treating the wood with an aqueous solution containing the extract and subsequently treating the wood with an aqueous solution containing a copper (II) salt.
Board of Control of Michigan Technological University, Houghton, Mich.
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Chemical Engineering | Engineering
Laks, Peter E., "Method for treating wood against fungal attack" (1991). Michigan Tech Patents. 59.