There are various wood modification methods, all of which permanently alter the structure of the cell walls. These include methods like heat treatment, acetylation and polymer grafting.
Kebony modifies wood by forming stable, locked-in furan polymers in the wood cell walls. These increase the dimensional stability as well as durability and hardness of the wood. The process is based on impregnation with furfuryl alcohol which is produced from agricultural crop waste. Kebony thus uses a plant derived waste product to give enhanced strength and durability to another plant product – namely wood.
In order to reach the required level of polymer in the wood, a traditional impregnation process is used. Although there are constraints in the selection of wood species for a successful impregnation, there is a range of Kebony products based on different species available.
After the impregnation step the wood is heated - whereby the in situ polymerisation of the furfuryl alcohol occurs. This step is referred to as the curing step. The resultant polymer, which is locked into the wood cells, is very stable and will not disintegrate or leak out of the wood.
Finally the cured wood is dried and the finished Kebony product is ready for shipment or further machining.