A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute
Hardboards were made individually from the main stem wood, branches and twig as well as from the tree tops and thinnings of kcora, all without bark. Also hardboards were made from the above raw materials by adding 10% bark to each of them. Another set of hardboards were made using 50% main stemwood and 50% branches, tops and thinnings taken together with bark as it occurred in all the components. The boards were tested for determining strength and water resistance properties. It was found that only the unbarked main stem wood produced hardboards that would nearly be equal to class-I boards. The boards made from tops and thinnings did not give the properties of class-I boards, but they seemed to be good enough for making ‘standard hardboards.’ Hardboards made with the branches were very poor in quality. The presence of bark greatly reduced the properties in all the cases. Main stem wood, however, in mixture with 10% bark may not be unsuitable for making hardboards.