Green gauged 100 x 50 mm radiata pine timber was preservative treated by brush application of "Boracol 20" followed by diffusion storage. Preservative retention analyses indicated that retention requirements in the core could be achieved within a six week diffusion period, thus representing a time saving of 25% over conventional boron treatment of rough-sawn radiata pine. Similar treatment of kiln dried radiata pine resulted in approximately 5 mm penetration. A longer diffusion period did not result in improved preservative penetration.

Download document (750 kb)
free for the members of IRG. Available if purchased.

Purchase this document