How do you tanalise timber?

Timber is 'TANALISED' (treated) in an industrial treatment vessel using TANALITH preservative applied using vacuum pressure technology. TANALITH and TANALISED are registered trade marks of the preservative manufacturer, Arch Timber Protection, and may only be used to describe industrial timber treatment using TANALITH preservative. The treatment process consists of 5 stages: 1. Timber is loaded into the treatment vessel. An initial vacuum is applied, and the timber cells are evacuated of air. This vacuum is held. 2. The cylinder is flooded under vacuum with TANALITH wood preservative. 3. Hydraulic pressure is applied, forcing the preservative deep into the structure of the timber. 4. A final vacuum extracts excess preservative solution, which is then pumped back into storage. 5. Low pressure inside timber draws in surface solution when vented to atmosphere. The treated timber is then left to dry - a minimum holding time of 48 hours is recommended. In Europe, TANALITH E preservative is used, which contains copper and triazole biocides, which are commonly used to protect food crops. TANALISED E pressure treated timber can be used in a range of applications, from construction timbers through to heavy duty, highway fencing applications, where a desired service life of 15 years plus can reasonably be expected. Note that where TANALISED treated timber is cross cut, notched or bored following treatment, liberal coating of ENSELE end grain preservative is required to maintain the integrity of the preservative system. Further information on TANALITH E and the treatment process can be found on the Arch Timber Protection website at General information regarding timber treatments is available on the Wikipedia site: