**6. Conclusions**

The maintaining of wood quality in time is usually achieved with the help of preservatives. These are individual chemical compounds or mixtures that make wood less susceptible to attack from a large variety of degradative factors or organisms. These organisms include insects, marine borers, and various types of fungi such as stain and decay. Some of these chemicals are effective against a wide range of organisms, while others are very specific and protect wood from only one type of organism.
