Substances such as tannin in wood that are not an integral part of the cellular structure and can be removed in solution by solvents, such hot or cold water, that do not react chemically with wood substances.
A comprehensive guide to the most common timber terms from A to Z.
Substances such as tannin in wood that are not an integral part of the cellular structure and can be removed in solution by solvents, such hot or cold water, that do not react chemically with wood substances.
