Wood preservatives are usually protecting the wood products from deterioration. Various methods of treatment can be practiced to incorporate the preservatives inside the wood depending upon the application of end product. Ultimately the preservative enhance the dimensional properties and provide resistance to wood products from biological pathogens. Improvement in the present situation of wood preservation in tropical countries would result in a great reduction of wood losses. Losses resulting from lack of preservation are strikingly high compared with the costs of preservation. Chemical and thermal modification are the most popular method of treatment from 20th century. The greatest impact on wood preservation in the 20th century is the invention of Chromated copper arsenate (CCA) preservatives which is gaining a lot of attention afterwards. The preservative used earlier are oily liquid preservatives like creosite, creosote oil and coal tar, petroleum but application of modern technology in the latest developed preservatives have grate efficiency over the earlier. | Enhancement of technology from old preservatives to new preservatives and latest development in the field of preservation
